latexmkL - Online in the Cloud

PROGRAM:

NAME

latexmk - generate LaTeX document

SYNOPSIS

latexmk [options] [file ...]

DESCRIPTION

Latexmk completely automates the process of compiling a LaTeX document. Essentially, it
is like a specialized relative of the general make utility, but one which determines
dependencies automatically and has some other very useful features. In its basic mode of
operation latexmk is given the name of the primary source file for a document, and it
issues the appropriate sequence of commands to generate a .dvi, .ps, .pdf and/or hardcopy
version of the document.

By default latexmk will run the commands necessary to generate a .dvi file.

Latexmk can also be set to run continuously with a suitable previewer. In that case the
latex program (or one of its relatives), etc, are rerun whenever one of the source files
is modified, and the previewer automatically updates the on-screen view of the compiled
document.

Latexmk determines which are the source files by examining the log file. (Optionally, it
also examines the list of input and output files generated by the -recorder option of
modern versions of latex (and pdflatex, xelatex, lualatex, etc). See the documentation
for the -recorder option of latexmk below.) When latexmk is run, it examines properties
of the source files, and if any have been changed since the last document generation,
latexmk will run the various LaTeX processing programs as necessary. In particular, it
will repeat the run of latex (or a related program)) often enough to resolve all cross
references; depending on the macro packages used. With some macro packages and document
classes, four, or even more, runs may be needed. If necessary, latexmk will also run
bibtex, biber, and/or makeindex. In addition, latexmk can be configured to generate other
necessary files. For example, from an updated figure file it can automatically generate a
file in encapsulated postscript or another suitable format for reading by LaTeX.

Latexmk has two different previewing options. In the simple -pv option, a dvi, postscript
or pdf previewer is automatically run after generating the dvi, postscript or pdf version
of the document. The type of file to view is selected according to configuration settings
and command line options.

The second previewing option is the powerful -pvc option (mnemonic: "preview
continuously"). In this case, latexmk runs continuously, regularly monitoring all the
source files to see if any have changed. Every time a change is detected, latexmk runs
all the programs necessary to generate a new version of the document. A good previewer
(like gv) will then automatically update its display. Thus the user can simply edit a
file and, when the changes are written to disk, latexmk completely automates the cycle of
updating the .dvi (and possibly the .ps and .pdf) file, and refreshing the previewer's
display. It's not quite WYSIWYG, but usefully close.

For other previewers, the user may have to manually make the previewer update its display,
which can be (some versions of xdvi and gsview) as simple as forcing a redraw of its
display.

Latexmk has the ability to print a banner in gray diagonally across each page when making
the postscript file. It can also, if needed, call an external program to do other
postprocessing on generated dvi and postscript files. (See the options -dF and -pF, and
the documentation for the $dvi_filter and $ps_filter configuration variables.) These
capabilities are leftover from older versions of latexmk. More flexibility can be
obtained in current versions, since the command strings for running latex, pdflatex, etc
can now be configured to run multiple commands. This also extends the possibility of
postprocessing generated files to pdf files. files.

Latexmk is highly configurable, both from the command line and in configuration files, so
that it can accommodate a wide variety of user needs and system configurations. Default
values are set according to the operating system, so latexmk often works without special
configuration on MS-Windows, cygwin, Linux, OS-X, and other UNIX systems (notably
Solaris).

A very annoying complication handled very reliably by latexmk, is that LaTeX is a multiple
pass system. On each run, LaTeX reads in information generated on a previous run, for
things like cross referencing and indexing. In the simplest cases, a second run of LaTeX
suffices, and often the log file contains a message about the need for another pass.
However, there is a wide variety of add-on macro packages to LaTeX, with a variety of
behaviors. The result is to break simple-minded determinations of how many runs are
needed and of which programs. In its new version, latexmk has a highly general and
efficient solution to these issues. The solution involves retaining between runs
information on the source files, and a symptom is that latexmk generates an extra file
(with extension .fdb_latexmk, by default) that contains the source file information.

LATEXMK OPTIONS AND ARGUMENTS ON COMMAND LINE

In general the command line to invoke latexmk has the form

latexmk [options] [file]

All options can be introduced by single or double "-" characters, e.g., "latexmk -help" or
"latexmk --help".

Note 1: In addition to the options in the list below, latexmk recognizes almost all the
options recognized by the latex, pdflatex programs (and their relatives) in their current
TeXLive and MiKTeX implementations. Some of the options for these programs also trigger
special action or behavior by latexmk, in which case they have specific explanations in
this document. Otherwise, they are just passed through to a called latex or pdflatex
program. Run latexmk with the -showextraoptions to get a list of the options that latexmk
accepts and that are simply passed through to latex or pdflatex (etc). See also the
explanation of the -showextraoptions option for more information.

Note 2: In this documentation, the program pdflatex is often referred to. Users of
programs like lualatex and xelatex should know that from latexmk's point of view, these
other programs behave like pdflatex, i.e., they make a pdf file from a tex file, etc. So
whenever pdflatex is mentioned without mention of the other programs, the statements apply
equally to lualatex, xelatex, and any other similar programs. Latexmk can be easily
configured to use whichever of these programs is needed. See the documentation for the
following options: -pdflatex="COMMAND", -lualatex, and -xelatex, and also see the
documentation for the $pdflatex configuration variable. At present latexmk cannot do
automatic detection of which program is to be used.

Definitions of options and arguments

file One or more files can be specified. If no files are specified, latexmk will, by
default, run on all files in the current working directory with a ".tex" extension.
This behavior can be changed: see the description concerning the @default_files
variable in the section "List of configuration variables usable in initialization
files".

If a file is specified without an extension, then the ".tex" extension is automatically
added, just as LaTeX does. Thus, if you specify:

latexmk foo

then latexmk will operate on the file "foo.tex".

-auxdir=FOO or -aux-directory=FOO

Sets the directory for auxiliary output files of (pdf)latex (.aux, .log etc). This
achieves its effect by the -aux-directory option of (pdf)latex, which currently is
only implemented on the MiKTeX version of (pdf)latex.

See also the -outdir/-output-directory options, and the $aux_dir, $out_dir, and
$search_path_separator configuration variables of latexmk. In particular, see the
documentation of $out_dir for some complications on what directory names are
suitable.

-bibtex
When the source file uses bbl files for bibliography, run bibtex or biber as needed
to regenerate the bbl files.

This property can also be configured by setting the $bibtex_use variable to 2 in a
configuration file

-bibtex-
Never run bibtex or biber.

A common use for this option is when a document comes from an external source,
complete with its bbl file(s), and the user does not have the corresponding bib
files available. In this situation use of the -bibtex- option will prevent latexmk
from trying to run bibtex or biber, which would result in overwriting of the bbl
files.

-bibtex-cond
When the source file uses bbl file(s) for the bibliography, run bibtex or biber as
needed to regenerate the bbl files, but only if the relevant bib file(s) exist.
Thus when the bib files are not available, bibtex or biber is not run, thereby
avoiding overwriting of the bbl file(s). This is the default setting.

(Note that it is possible for latexmk to decide that the bib file does not exist,
even though the bib file does exist and bibtex or biber finds it. The problem is
that the bib file may not be in the current directory but in some search path; the
places latexmk and bibtex or biber cause to be searched need not be identical. On
modern installations of TeX and related programs this problem should not arise,
since latexmk uses the kpsewhich program to do the search, and kpsewhich should use
the same search path as bibtex and biber. If this problem arises, use the -bibtex
option when invoking latexmk.)

-bm <message>
A banner message to print diagonally across each page when converting the dvi file
to postscript. The message must be a single argument on the command line so be
careful with quoting spaces and such.

Note that if the -bm option is specified, the -ps option is assumed.

-bi <intensity>
How dark to print the banner message. A decimal number between 0 and 1. 0 is
black and 1 is white. The default is 0.95, which is OK unless your toner cartridge
is getting low.

-bs <scale>
A decimal number that specifies how large the banner message will be printed.
Experimentation is necessary to get the right scale for your message, as a rule of
thumb the scale should be about equal to 1100 divided by the number of characters
in the message. The default is 220.0 which is just right for 5 character messages.

-commands
List the commands used by latexmk for processing files, and then exit.

-c Clean up (remove) all regeneratable files generated by latex and bibtex or biber
except dvi, postscript and pdf. These files are a combination of log files, aux
files, latexmk's database file of source file information, and those with
extensions specified in the @generated_exts configuration variable. In addition,
files specified by the $clean_ext configuration variable are removed.

This cleanup is instead of a regular make. See the -gg option if you want to do a
cleanup then a make.

If $bibtex_use is set to 0 or 1, bbl files are counted as non-regeneratable.

If $cleanup_includes_cusdep_generated is nonzero, regeneratable files are
considered as including those generated by custom dependencies and are also
deleted. Otherwise these files are not deleted.

-C Clean up (remove) all regeneratable files generated by latex and bibtex or biber.
This is the same as the -c option with the addition of dvi, postscript and pdf
files, and those specified in the $clean_full_ext configuration variable.

This cleanup is instead of a regular make. See the -gg option if you want to do a
cleanup than a make.

If $bibtex_use is set to 0 or 1, bbl files are counted as non-regeneratable.

If $cleanup_includes_cusdep_generated is nonzero, regeneratable files are
considered as including those generated by custom dependencies and are also
deleted. Otherwise these files are not deleted.

-CA (Obsolete). Now equivalent to the -C option. See that option for details.

-cd Change to the directory containing the main source file before processing it. Then
all the generated files (aux, log, dvi, pdf, etc) will be relative to the source
file.

This option is particularly useful when latexmk is invoked from a GUI configured to
invoke latexmk with a full pathname for the source file.

-cd- Do NOT change to the directory containing the main source file before processing
it. Then all the generated files (aux, log, dvi, pdf, etc) will be relative to the
current directory rather than the source file.

This is the default behavior and corresponds to the behavior of the latex and
pdflatex programs. However, it is not desirable behavior when latexmk is invoked
by a GUI configured to invoke latexmk with a full pathname for the source file.
See the -cd option.

-CF Remove the file containing the database of source file information, before doing
the other actions requested.

-d Set draft mode. This prints the banner message "DRAFT" across your page when
converting the dvi file to postscript. Size and intensity can be modified with the
-bs and -bi options. The -bm option will override this option as this is really
just a short way of specifying:

latexmk -bm DRAFT

Note that if the -d option is specified, the -ps option is assumed.

-deps Show a list of dependent files after processing. This is in the form of a
dependency list of the form used by the make program, and it is therefore suitable
for use in a Makefile. It gives an overall view of the files without listing
intermediate files, as well as latexmk can determine them.

By default the list of dependent files is sent to stdout (i.e., normally to the
screen unless you've redirected latexmk's output). But you can set the filename
where the list is sent by the -deps-out= option.

See the section "USING latexmk WITH make" for an example of how to use a dependency
list with make.

Users familiar with GNU automake and gcc will find that the -deps option is very
similar in its purpose and results to the -M option to gcc. (In fact, latexmk also
has options -M, -MF, and -MP options that behave like those of gcc.)

-dependents
Equivalent to -deps.

-deps- Do not show a list of dependent files after processing. (This is the default.)

-dependents-
Equivalent to -deps-.

-deps-out=FILENAME
Set the filename to which the list of dependent files is written. If the FILENAME
argument is omitted or set to "-", then the output is sent to stdout.

Use of this option also turns on the output of the list of dependent files after
processing.

-dF Dvi file filtering. The argument to this option is a filter which will generate a
filtered dvi file with the extension ".dviF". All extra processing (e.g.
conversion to postscript, preview, printing) will then be performed on this
filtered dvi file.

Example usage: To use dviselect to select only the even pages of the dvi file:

latexmk -dF "dviselect even" foo.tex

-diagnostics
Print detailed diagnostics during a run. This may help for debugging problems or
to understand latexmk's behavior in difficult situations.

-dvi Generate dvi version of document.

-dvi- Turn off generation of dvi version of document. (This may get overridden, if some
other file is made (e.g., a .ps file) that is generated from the dvi file, or if no
generated file at all is requested.)

-e <code>
Execute the specified initialization code before processing. The code is Perl code
of the same form as is used in latexmk's initialization files -- for more details,
see the information on the -r option, and the section about
"Configuration/initialization (RC) files". The code is typically a sequence of
assignment statements separated by semicolons.

The code is executed when the -e option is encountered during latexmk's parsing of
its command line. See the -r option for a way of executing initialization code
from a file. An error results in latexmk stopping. Multiple instances of the -r
and -e options can be used, and they are executed in the order they appear on the
command line.

Some care is needed to deal with proper quoting of special characters in the code
on the command line. For example, suppose you want to set the latex command to use
its -shell-escape option, then under UNIX/LINUX you could use the line

latexmk -e '$latex=q/latex %O -shell-escape %S/' file.tex

Note that the single quotes block normal UNIX/LINUX command shells from treating
the characters inside the quotes as special. (In this example, the q/.../
construct is a Perl idiom equivalent to using single quotes. This avoids the
complications of getting a quote character inside an already quoted string in a way
that is independent of both the shell and the operating-system.)

The above command line will NOT work under MS-Windows with cmd.exe or command.com
or 4nt.exe. For MS-Windows with these command shells you could use

latexmk -e "$latex=q/latex %O -shell-escape %S/" file.tex

or

latexmk -e "$latex='latex %O -shell-escape %S'" file.tex

The last two examples will NOT work with UNIX/LINUX command shells.

-f Force latexmk to continue document processing despite errors. Normally, when
latexmk detects that LaTeX or another program has found an error which will not be
resolved by further processing, no further processing is carried out.

Note: "Further processing" means the running of other programs or the rerunning of
latex (etc) that would be done if no errors had occurred. If instead, or
additionally, you want the latex (etc) program not to pause for user input after an
error, you should arrange this by an option that is passed to the program, e.g., by
latexmk's option -interaction=nonstopmode.

-f- Turn off the forced processing-past-errors such as is set by the -f option. This
could be used to override a setting in a configuration file.

-g Force latexmk to process document fully, even under situations where latexmk would
normally decide that no changes in the source files have occurred since the
previous run. This option is useful, for example, if you change some options and
wish to reprocess the files.

-g- Turn off -g.

-gg "Super go mode" or "clean make": clean out generated files as if -C had been given,
and then do a regular make.

-h, -help
Print help information.

-jobname=STRING
Set the basename of output files(s) to STRING, instead of the default, which is the
basename of the specified TeX file.

This is like the same option for current implementations of the latex, pdflatex,
etc, and the passing of this option to these programs is part of latexmk's
implementation of -jobname.

-l Run in landscape mode, using the landscape mode for the previewers and the dvi to
postscript converters. This option is not normally needed nowadays, since current
previewers normally determine this information automatically.

-l- Turn off -l.

-latex="COMMAND"
This sets the string specifying the command to run latex, and is typically used to
add desired options. Since the string normally contains spaces, it should be
quoted, e.g.,

latexmk -latex="latex --shell-escape %O %S" foo.tex

The specification of the contents of the string are the same as for the $latex
configuration variable. Depending on your operating system and the command-line
shell you are using, you may need to change the single quotes to double quotes (or
something else).

To set the command for running pdflatex (rather than the command for latex) see the
-pdflatex option.

Note that the effect of this option can also be achieved by using the -e option
with a suitable line of Perl code to set the $latex variable. See the explanation
of the -e option.

-lualatex
Use lualatex. That is, use lualatex to process the source file(s) to pdf (in place
of pdflatex). This option is exactly equivalent to specifying the following
sequence of options:
-pdflatex="lualatex %O %S" -pdf -dvi- -ps-
-M Show list of dependent files after processing. This is equivalent to the -deps
option.

-MF file
If a list of dependents is made, the -MF specifies the file to write it to.

-MP If a list of dependents is made, includes phony target for each source file. If
you use the dependents list in a Makefile, the dummy rules work around errors make
gives if you remove header files without updating the Makefile to match.

-new-viewer
When in continuous-preview mode, always start a new viewer to view the generated
file. By default, latexmk will, in continuous-preview mode, test for a previously
running previewer for the same file and not start a new one if a previous previewer
is running. However, its test sometimes fails (notably if there is an already-
running previewer that is viewing a file of the same name as the current file, but
in a different directory). This option turns off the default behavior.

-new-viewer-
The inverse of the -new-viewer option. It puts latexmk in its normal behavior that
in preview-continuous mode it checks for an already-running previewer.

-nobibtex
Never run bibtex or biber.

A common use for this option is when a document comes from an external source,
complete with its bbl file(s), and the user does not have the corresponding bib
files available. In this situation use of the -nobibtex option will prevent
latexmk from trying to run bibtex or biber, which would result in overwriting of
the bbl files.

-norc Turn off the automatic reading of initialization (rc) files.

N.B. Normally the initialization files are read and obeyed, and then command line
options are obeyed in the order they are encountered. But -norc is an exception to
this rule: it is acted on first, no matter where it occurs on the command line.

-outdir=FOO or -output-directory=FOO

Sets the directory for the output files of (pdf)latex. This achieves its effect by
the -output-directory option of (pdf)latex, which currently (Dec. 2011 and later)
is implemented on the common versions of (pdf)latex, i.e., MiKTeX and TeXLive. It
may not be present in other versions.

See also the -auxdir/-aux-directory options, and the $aux_dir, $out_dir, and
$search_path_separator configuration variables of latexmk. In particular, see the
documentation of $out_dir for some complications on what directory names are
suitable.

-p Print out the document. By default the file to be printed is the first in the list
postscript, pdf, dvi that is being made. But you can use the -print=... option to
change the type of file to be printed, and you can configure this in a start up
file (by setting the $print_type variable).

However, printing is enabled by default only under UNIX/LINUX systems, where the
default is to use the lpr command and only on postscript files. In general, the
correct behavior for printing very much depends on your system's software. In
particular, under MS-Windows you must have suitable program(s) available, and you
must have configured the print commands used by latexmk. This can be non-trivial.
See the documentation on the $lpr, $lpr_dvi, and $lpr_pdf configuration variables
to see how to set the commands for printing.

This option is incompatible with the -pv and -pvc options, so it turns them off.

-pdf Generate pdf version of document using pdflatex. (If you wish to use lualatex or
xelatex, you can use whichever of the options -lualatex or -xelatex applies.) To
configure latexmk to have such behavior by default, see the section on
"Configuration/initialization (rc) files".

-pdfdvi
Generate pdf version of document from the dvi file, by default using dvipdf.

-pdfps Generate pdf version of document from the ps file, by default using ps2pdf.

-pdf- Turn off generation of pdf version of document. (This can be used to override a
setting in a configuration file. It may get overridden if some other option
requires the generation of a pdf file.)

-pdflatex="COMMAND"
This sets the string specifying the command to run pdflatex, and is typically used
to add desired options. Since the string normally contains spaces, it should be
quoted, e.g.,

latexmk -pdf -pdflatex="pdflatex --shell-escape %O %S" foo.tex

The specification of the contents of the string are the same as for the $pdflatex
configuration variable. Depending on your operating system and the command-line
shell you are using, you may need to change the single quotes to double quotes (or
something else).

This option can also be used to set a program to be used instead of the standard
pdflatex program, e.g.,

latexmk -pdf -pdflatex="lualatex %O %S" foo.tex

to use lualatex or

latexmk -pdf -pdflatex="xelatex %O %S" foo.tex

to use xelatex.

To set the command for running latex (rather than the command for pdflatex) see the
-latex option.

Note that the effect of this option can also be achieved by using the -e option
with a suitable line of Perl code to set the $pdflatex variable. See the
explanation of the -e option.

-print=dvi, -print=ps, -print=pdf, -print=auto,
Define which kind of file is printed. This option also ensures that the requisite
file is made, and turns on printing.

The (default) case -print=auto determines the kind of print file automatically from
the set of files that is being made. The first in the list postscript, pdf, dvi
that is among the files to be made is the one used for print out.

-ps Generate postscript version of document.

-ps- Turn off generation of postscript version of document. This can be used to
override a setting in a configuration file. (It may get overridden by some other
option that requires a postscript file, for example a request for printing.)

-pF Postscript file filtering. The argument to this option is a filter which will
generate a filtered postscript file with the extension ".psF". All extra
processing (e.g. preview, printing) will then be performed on this filtered
postscript file.

Example of usage: Use psnup to print two pages on the one page:

latexmk -ps -pF 'psnup -2' foo.tex

or

latexmk -ps -pF "psnup -2" foo.tex

Whether to use single or double quotes round the "psnup -2" will depend on your
command interpreter, as used by the particular version of perl and the operating
system on your computer.

-pv Run file previewer. If the -view option is used, this will select the kind of file
to be previewed (dvi, ps or pdf). Otherwise the viewer views the "highest" kind of
file selected, by the -dvi, -ps, -pdf, -pdfps options, in the order dvi, ps, pdf
(low to high). If no file type has been selected, the dvi previewer will be used.
This option is incompatible with the -p and -pvc options, so it turns them off.

-pv- Turn off -pv.

-pvc Run a file previewer and continually update the .dvi, .ps, and/or .pdf files
whenever changes are made to source files (see the Description above). Which of
these files is generated and which is viewed is governed by the other options, and
is the same as for the -pv option. The preview-continuous option -pvc can only
work with one file. So in this case you will normally only specify one filename on
the command line. It is also incompatible with the -p and -pv options, so it turns
these options off.

The -pvc option also turns off force mode (-f), as is normally best for continuous
preview mode. If you really want force mode, use the options in the order -pvc -f.

With a good previewer the display will be automatically updated. (Under some but
not all versions of UNIX/Linux "gv -watch" does this for postscript files; this can
be set by a configuration variable. This would also work for pdf files except for
an apparent bug in gv that causes an error when the newly updated pdf file is
read.) Many other previewers will need a manual update.

Important note: the acroread program on MS-Windows locks the pdf file, and prevents
new versions being written, so it is a bad idea to use acroread to view pdf files
in preview-continuous mode. It is better to use a different viewer: SumatraPDF and
gsview are good possibilities.

There are some other methods for arranging an update, notably useful for many
versions of xdvi and xpdf. These are best set in latexmk's configuration; see
below.

Note that if latexmk dies or is stopped by the user, the "forked" previewer will
continue to run. Successive invocations with the -pvc option will not fork new
previewers, but latexmk will normally use the existing previewer. (At least this
will happen when latexmk is running under an operating system where it knows how to
determine whether an existing previewer is running.)

-pvc- Turn off -pvc.

-quiet Same as -silent

-r <rcfile>
Read the specified initialization file ("RC file") before processing.

Be careful about the ordering: (1) Standard initialization files -- see the section
below on "Configuration/initialization (RC) files" -- are read first. (2) Then the
options on the command line are acted on in the order they are given. Therefore if
an initialization file is specified by the -r option, it is read during this second
step. Thus an initialization file specified with the -r option can override both
the standard initialization files and previously specified options. But all of
these can be overridden by later options.

The contents of the RC file just comprise a piece of code in the Perl programming
language (typically a sequence of assignment statements); they are executed when
the -r option is encountered during latexmk's parsing of its command line. See the
-e option for a way of giving initialization code directly on latexmk's command
line. An error results in latexmk stopping. Multiple instances of the -r and -e
options can be used, and they are executed in the order they appear on the command
line.

-recorder
Use the -recorder option with latex and pdflatex. In (most) modern versions of
these programs, this results in a file of extension .fls containing a list of the
files that these programs have read and written. Latexmk will then use this file
to improve its detection of source files and generated files after a run of latex
or pdflatex.

For further information, see the documentation for the $recorder configuration
variable.

-recorder-
Do not use the -recorder option with latex and pdflatex.

-rules Show a list of latemk's rules and dependencies after processing.

-rules-
Do not show a list of latexmk's rules and dependencies after processing. (This is
the default.)

-showextraoptions
Show the list of extra latex and pdflatex options that latexmk recognizes. These
are options for the latex and pdflatex that latexmk recognizes, but simply passes
through to these programs when they are run. These options are (currently) a
combination of those allowed by the TeXLive and MiKTeX implementations. (If a
particular option is given to latexmk but is not handled by the particular
implementation of latex or pdflatex that is being used, that program will probably
give an error message.) These options are very numerous, but are not listed in
this documentation because they have no effect on latexmk's actions.

There are a few options (-includedirectory=dir, -initialize, -ini) that are not
recognized, either because they don't fit with latexmk's intended operations, or
because they need special processing by latexmk that isn't implemented (at least,
not yet).

There are also options that are accepted by latex etc, but instead trigger actions
by latexmk: -help, -version.

Finally, there are certain options for latex and pdflatex (e.g., -recorder) that
trigger special actions or behavior by latexmk itself as well as being passed in
some form to the called latex and pdflatex program, or that affect other programs
as well. These options do have entries in this documentation. These options are:
-jobname=STRING, -aux-directory=dir, -output-directory=DIR, -quiet, and -recorder.

-logfilewarninglist
-logfilewarnings After a run of (pdf)latex, give a list of warnings about undefined
citations and references (unless silent mode is on).

See also the $silence_logfile_warnings configuration variable.

-logfilewarninglist-
-logfilewarnings- After a run of (pdf)latex, do not give a list of warnings about
undefined citations and references. (Default)

See also the $silence_logfile_warnings configuration variable.

-silent
Run commands silently, i.e., with options that reduce the amount of diagnostics
generated. For example, with the default settings, the command "latex
-interaction=batchmode" is used for latex.

See also the -logfilewarninglist and -logfilewarninglist- options.

Also reduce the number of informational messages that latexmk generates.

To change the options used to make the commands run silently, you need to configure
latexmk with changed values of its configuration variables, the relevant ones being
$bibtex_silent_switch, $biber_silent_switch, $dvipdf_silent_switch,
$dvips_silent_switch, $latex_silent_switch, $makeindex_silent_switch, and
$pdflatex_silent_switch.

-use-make
When after a run of latex or pdflatex, there are warnings about missing files
(e.g., as requested by the LaTeX \input, \include, and \includgraphics), latexmk
tries to make them by a custom dependency. If no relevant custom dependency with an
appropriate source file is found, and if the -use-make option is set, then latexmk
will try as a resort using the make program to try to make the missing files.

Note that the filename may be specified without an extension, e.g., by
\includegraphics{drawing} in a LaTeX file. In that case, latexmk will try making
drawing.ext with ext set in turn to the possible extensions that are relevant for
latex (or as appropriate pdflatex).

See also the documentation for the $use_make_for_missing_files configuration
variable.

-use-make-
Do not use the make program to try to make missing files. (Default.)

-v, -version
Print version number of latexmk.

-verbose
Opposite of -silent. This is the default setting.

-view=default, -view=dvi, -view=ps, -view=pdf
Set the kind of file used when previewing is requested (e.g., by the -pv or -pvc
switches). The default is to view the "highest" kind of requested file (in the
order dvi, ps, pdf).

-xelatex
Use xelatex. That is, use xelatex to process the source file(s) to pdf (in place
of pdflatex). This option is exactly equivalent to specifying the following
sequence of options:
-pdflatex="xelatex %O %S" -pdf -dvi- -ps-
Compatibility between options

The preview-continuous option -pvc can only work with one file. So in this case you will
normally only specify one filename on the command line.

Options -p, -pv and -pvc are mutually exclusive. So each of these options turns the
others off.

EXAMPLES

% latexmk thesis # run latex enough times to resolve
cross-references

% latexmk -pvc -ps thesis# run latex enough times to resolve
cross-references, make a postscript
file, start a previewer. Then
watch for changes in the source
file thesis.tex and any files it
uses. After any changes rerun latex
the appropriate number of times and
remake the postscript file. If latex
encounters an error, latexmk will
keep running, watching for
source file changes.

% latexmk -c # remove .aux, .log, .bbl, .blg, .dvi,
.pdf, .ps & .bbl files

HOW TO CHANGE THE WAY LATEXMK BEHAVES, DEALING WITH PROBLEMS, ETC

Some possibilities:

a. If you get a strange error, do look carefully at the output that is on the screen and
in log files. While there is much that is notoriously verbose in the output of latex (and
that is added to by latexmk), the verbosity is there for a reason: to enable the user to
diagnose problems. Latexmk does repeat some messages at the end of a run that it thinks
would otherwise be easy to miss in the middle of other output.

b. If latexmk doesn't do things the way you would like, the first step in finding out what
to do is to look in this documentation at the list of command line options and then at the
sections on configuration/initialization files. A lot of latexmk's behavior is
configurable to deal with particular situations. (But there is a lot of reading.)

c. Further tricks can involve replacing the standard commands that latexmk by other
commands or scripts.

d. For possible examples of code for use in an RC file, see the directory example_rcfiles
in the distribution of latexmk (e.g., at http://www.ctan.org/tex-
archive/support/latexmk/example_rcfiles). Even if these examples don't do what you want,
they may provide suitable inspiration.

e. There's a useful trick that can be used when you are lualatex instead of pdflatex (and
in some related situations). The problem is that latexmk won't notice a dependency on a
file, bar.baz say, that is input by the lua code in your document instead of by the LaTeX
part. (Thus if you change bar.baz and rerun latexmk, then latexmk will think no files
have changed and not rerun lualatex, whereas if you had '\input{bar.baz}' in the LaTeX
part of the document, latexmk would notice the change.) One solution is just to put the
following somewhere in the LaTeX part of the document:

\typeout{(bar.baz)}

This puts a line in the log file that latexmk will treat as implying that the file bar.baz
was read. (At present I don't know a way of doing this automatically.) Of course, if the
file has a different name, change bar.baz to the name of your file.

f. Look on tex.stackexchange, i.e., at
http://tex.stackexchange.com/questions/tagged/latexmk Someone may have already solved
your problem.

g. Ask a question at tex.stackexchange.com.

h. Or ask me (the author of latexmk). My e-mail is at the end of this documentation.

CONFIGURATION/INITIALIZATION (RC) FILES

Latexmk can be customized using initialization files, which are read at startup in the
following order:

1) The system RC file, if it exists.
On a UNIX system, latexmk searches for following places for its system RC file, in the
following order, and reads the first it finds:
"/opt/local/share/latexmk/LatexMk",
"/usr/local/share/latexmk/LatexMk",
"/usr/local/lib/latexmk/LatexMk".
On a MS-WINDOWS system it looks for "C:\latexmk\LatexMk".
On a cygwin system (i.e., a MS-Windows system in which Perl is that of cygwin), latexmk
reads for the first it finds of
"/cygdrive/c/latexmk/LatexMk",
"/opt/local/share/latexmk/LatexMk",
"/usr/local/share/latexmk/LatexMk",
"/usr/local/lib/latexmk/LatexMk".
In addition, it then tries the same set of locations, but with the file name replaced
"LatexMk" replaced by "latexmkrc".

2) The user's RC file, "$HOME/.latexmkrc", if it exists. Here $HOME is the user's home
directory. [Latexmk determines the user's home directory as follows: It is the value of
the environment variable HOME, if this variable exists, which normally is the case on
UNIX-like systems (including LINUX and OS-X). Otherwise the environment variable
USERPROFILE is used, if it exists, which normally is the case on MS-Windows systems.
Otherwise a blank string is used instead of $HOME.]

3) The RC file in the current working directory. This file can be named either
"latexmkrc" or ".latexmkrc", and the first of these to be found is used, if any.

4) Any RC file(s) specified on the command line with the -r option.

Each RC file is a sequence of Perl commands. Naturally, a user can use this in creative
ways. But for most purposes, one simply uses a sequence of assignment statements that
override some of the built-in settings of Latexmk. Straightforward cases can be handled
without knowledge of the Perl language by using the examples in this document as
templates. Comment lines are introduced by the "#" character.

Note that command line options are obeyed in the order in which they are written; thus any
RC file specified on the command line with the -r option can override previous options but
can be itself overridden by later options on the command line. There is also the -e
option, which allows initialization code to be specified in latexmk's command line.

For possible examples of code for in an RC file, see the directory example_rcfiles in the
distribution of latexmk (e.g., at http://www.ctan.org/tex-
archive/support/latexmk/example_rcfiles).

HOW TO SET VARIABLES IN INITIALIZATION FILES

The important variables that can be configured are described in the section "List of
configuration variables usable in initialization files". Syntax for setting these
variables is of the following forms:

$bibtex = 'bibtex %O %B';

for the setting of a string variable,

$preview_mode = 1;

for the setting of a numeric variable, and

@default_files = ('paper', 'paper1');

for the setting of an array of strings. It is possible to append an item to an array
variable as follows:

push @default_files, 'paper2';

Note that simple "scalar" variables have names that begin with a $ character and array
variables have names that begin with a @ character. Each statement ends with a semicolon.

Strings should be enclosed in single quotes. (You could use double quotes, as in many
programming languages. But then the Perl programming language brings into play some
special rules for interpolating variables into strings. People not fluent in Perl will
want to avoid these complications.)

You can do much more complicated things, but for this you will need to consult a manual
for the Perl programming language.

FORMAT OF COMMAND SPECIFICATIONS

Some of the variables set the commands that latexmk uses for carrying out its work, for
example to generate a dvi file from a tex file or to view a postscript file. This section
describes some important features of how the commands are specified.

Placeholders: Supposed you wanted latexmk to use the command elatex in place of the
regular latex command, and suppose moreover that you wanted to give it the option
"--shell-escape". You could do this by the following setting:

$latex = 'elatex --shell-escape %O %S';

The two items starting with the % character are placeholders. These are substituted by
appropriate values before the command is run. Thus %S will be replaced by the source file
that elatex will be applied to, and %O will be replaced by any options that latexmk has
decided to use for this command. (E.g., if you used the -silent option it would replace
%O by "-interaction=batchmode".)

The available placeholders are:

%B base of filename for current command. E.g., if a postscript file document.ps is
being made from the dvi file document.dvi, then the basename is document.

%D destination file (e.g., the name of the postscript file when converting a dvi file
to postscript).

%O options

%R root filename. This is the base name for the main tex file.

%S source file (e.g., the name of the dvi file when converting a dvi file to ps).

%T The name of the primary tex file.

%Y Name of directory for auxiliary output files (see the configuration variable
$aux_dir). A directory separation character ('/') is appended if $aux_dir is non-
empty and does not end in a suitable character, with suitable characters being
those appropriate to UNIX and MS-Windows, i.e., ':', '/' and '\'.

%Z Name of directory for output files (see the configuration variable $out_dir). A
directory separation character ('/') is appended if $out_dir is non-empty and does
not end in a suitable character, with suitable characters being those appropriate
to UNIX and MS-Windows, i.e., ':', '/' and '\'.

If for some reason you need a literal % character in your string not subject to the above
rules, use a pair of these characters. Thus with the command specification $ps_previewer
= 'latex -ad=%%Sfile.ad %S', the %%S will become %S when the command is executed, but the
%S will be replaced by the source filename, which in this case would be the name of a
postscript file to be viewed.

Appropriate quoting will be applied to the filename substitutions, so you mustn't supply
them yourself even if the names of your files have spaces in them. (But if your TeX
filenames have spaces in them, beware that many versions of the TeX program cannot
correctly handle filenames containing spaces.) In case latexmk's quoting does not work
correctly on your system, you can turn it off -- see the documentation for the variable
$quote_filenames.

The distinction between %B and %R needs a bit of care, since they are often the same, but
not always. For example on a simple document, the basename of a bibtex run is the same as
for the texfile. But in a document with several bibliographies, the bibliography files
will have a variety of names. Since bibtex is invoked with the basename of the
bibliography file, the setting for the bibtex command should therefore be

$bibtex = 'bibtex %O %B';

Generally, you should use %B rather than %R. Similarly for most purposes, the name %T of
the primary texfile is not a useful placeholder.

See the default values in the section "List of configuration variables usable in
initialization files" for what is normally the most appropriate usage.

If you omit to supply any placeholders whatever in the specification of a command, latexmk
will supply what its author thinks are appropriate defaults. This gives compatibility
with configuration files for previous versions of latexmk, which didn't use placeholders.

"Detaching" a command: Normally when latexmk runs a command, it waits for the command to
run to completion. This is appropriate for commands like latex, of course. But for
previewers, the command should normally run detached, so that latexmk gets the previewer
running and then returns to its next task (or exits if there is nothing else to do). To
achieve this effect of detaching a command, you need to precede the command name with
"start ", as in

$dvi_previewer = 'start xdvi %O %S';

This will be translated to whatever is appropriate for your operating system.

Notes: (1) In some circumstances, latex will always run a command detached. This is the
case for a previewer in preview continuous mode, since otherwise previewing continuously
makes no sense. (2) This precludes the possibility of running a command named start. (3)
If the word start occurs more than once at the beginning of the command string, that is
equivalent to having just one. (4) Under cygwin, some complications happen, since cygwin
amounts to a complicated merging of UNIX and MS-Windows. See the source code for how I've
handled the problem.

Command names containing spaces: Under MS-Windows it is common that the name of a command
includes spaces, since software is often installed in a subdirectory of "C:\Program
Files". Such command names should be enclosed in double quotes, as in

$lpr_pdf = '"c:/Program Files/Ghostgum/gsview/gsview32.exe" /p %S';
$pdf_previewer = 'start "c:/Program Files/SumatraPDF/SumatraPDF.exe" %O %S';
$pdf_previewer = 'start "c:/Program Files/SumatraPDF (x86)/SumatraPDF.exe" %O %S';

(Note about the above example: Forward slashes are equivalent to backslashes in filenames
under MS-Windows, provided that the filename is inside double quotes. It is easier to use
forward slashes in examples like the one above, since then one does not have to worry
about the rules for dealing with forward slashes in strings in the Perl language.)

Command names under Cygwin: If latexmk is executed by Cygwin's Perl, be particularly
certain that pathnames in commands have forward slashes not the usual backslashes for the
separator of pathname components. See the above examples. Backslashes often get
misinterpreted by the Unix shell used by Cygwin's Perl to execute external commands.
Forward slashes don't suffer from this problem, and (when quoted, as above) are equally
acceptable to MS-Windows.

Using MS-Windows file associations: A useful trick under modern versions of MS-Windows
(e.g., WinXP) is to use just the command 'start' by itself:

$dvi_previewer = 'start %S';

Under recent versions of MS-Windows, this will cause to be run whatever program the system
has associated with dvi files. (The same applies for a postscript viewer and a pdf
viewer.) But note that this trick is not always suitable for the pdf previwer, if your
system has acroread for the default pdf viewer. As explained elsewhere, acroread under
MS-Windows does not work well with latex and latexmk, because acroread locks the pdf file.

Not using a certain command: If a command is not to be run, the command name NONE is used,
as in

$lpr = 'NONE lpr';

This typically is used when an appropriate command does not exist on your system. The
string after the "NONE" is effectively a comment.

Options to commands: Setting the name of a command can be used not only for changing the
name of the command called, but also to add options to command. Suppose you want latexmk
to use latex with source specials enabled. Then you might use the following line in an
initialization file:

$latex = 'latex --src-specials %O %S';

Running a subroutine instead of an external command: Use a specification starting with
"internal", as in

$latex = 'internal mylatex %O %S';
sub mylatex {
my @args = @_;
# Possible preprocessing here
return system 'latex', @args;
}

Advanced tricks: Normally one specifies a single command for the commands invoked by
latexmk. Naturally, if there is some complicated additional processing you need to do in
your special situation, you can write a script (or batch file) to do the processing, and
then configure latexmk to use your script in place of the standard program.

It is also possible to configure latexmk to run multiple commands. For example, if when
running pdflatex to generate a pdf file from a tex file you need to run another program
after pdflatex to perform some extra processing, you could do something like:

$pdflatex = 'pdflatex --shell-escape %O %S; pst2pdf_for_latexmk %B';

This definition assumes you are using a UNIX-like system (which includes Linux and OS-X),
so that the two commands to be run are separated by the semicolon in the middle of the
string.

If you are using MS-Windows, you would replace the above line by

$pdflatex = 'cmd /c pdflatex --shell-escape %O %S'
. '&& pst2pdf_for_latexmk %B';

Here, the UNIX command separator ; is replaced by &&. In addition, there is a problem
that some versions of Perl on MS-Windows do not obey the command separator; this problem
is overcome by explicitly invoking the MS-Windows command-line processor cmd.exe.

LIST OF CONFIGURATION VARIABLES USABLE IN INITIALIZATION FILES

Default values are indicated in brackets.

$always_view_file_via_temporary [0]
Whether ps and pdf files are initially to be made in a temporary directory and then
moved to the final location. (This applies to dvips, dvipdf, and ps2pdf
operations, and the filtering operators on dvi and ps files. It does not apply to
pdflatex, unfortunately.)

This use of a temporary file solves a problem that the making of these files can
occupy a substantial time. If a viewer sees that the file has changed, it reads
the new file, and this can cause havoc if the program writing the file has not yet
finished its work.

See the $pvc_view_file_via_temporary variable for a setting that applies only if
preview-continuous mode (-pvc option) is used. See $tmpdir for the setting of the
directory where the temporary file is created.

$auto_rc_use [1]
Whether to automatically read the standard initialization (rc) files, which are the
system RC file, the user's RC file, and the RC file in the current directory. The
command line option -norc can be used to turn this setting off. Each RC file could
also turn this setting off, i.e., it could set $auto_rc_use to zero to prevent
automatic reading of the later RC files.

This variable does not affect the reading of RC files specified on the command line
by the -r option.

$aux_dir [""]
The directory in which auxiliary files (aux, log, etc) are to be written by a run
of (pdf)latex. If this variable is not set, but $out_dir is set, then $aux_dir is
set to $out_dir, which is the directory to which general output files are to be
written.

Important note: The effect of $aux_dir, if different from $out_dir, is achieved by
giving (pdf)latex the -aux-directory. Currently (Dec. 2011 and later) this only
works on the MiKTeX version of (pdf)latex.

See also the documentation of $out_dir for some complications on what directory
names are suitable.

$banner [0]
If nonzero, the banner message is printed across each page when converting the dvi
file to postscript. Without modifying the variable $banner_message, this is
equivalent to specifying the -d option.

Note that if $banner is nonzero, the $postscript_mode is assumed and the postscript
file is always generated, even if it is newer than the dvi file.

$banner_intensity [0.95]
Equivalent to the -bi option, this is a decimal number between 0 and 1 that
specifies how dark to print the banner message. 0 is black, 1 is white. The
default is just right if your toner cartridge isn't running too low.

$banner_message ["DRAFT"]
The banner message to print across each page when converting the dvi file to
postscript. This is equivalent to the -bm option.

$banner_scale [220.0]
A decimal number that specifies how large the banner message will be printed.
Experimentation is necessary to get the right scale for your message, as a rule of
thumb the scale should be about equal to 1100 divided by the number of characters
in the message. The Default is just right for 5 character messages. This is
equivalent to the -bs option.

@BIBINPUTS
This is an array variable, now mostly obsolete, that specifies directories where
latexmk should look for .bib files. By default it is set from the BIBINPUTS
environment variable of the operating system. If that environment variable is not
set, a single element list consisting of the current directory is set. The format
of the directory names depends on your operating system, of course. Examples for
setting this variable are:

@BIBINPUTS = ( ".", "C:\bibfiles" );
@BIBINPUTS = ( ".", "\\server\bibfiles" );
@BIBINPUTS = ( ".", "C:/bibfiles" );
@BIBINPUTS = ( ".", "//server/bibfiles" );
@BIBINPUTS = ( ".", "/usr/local/texmf/bibtex/bib" );

Note that under MS Windows, either a forward slash "/" or a backward slash "\" can
be used to separate pathname components, so the first two and the second two
examples are equivalent. Each backward slash should be doubled to avoid running
afoul of Perl's rules for writing strings.

Important note: This variable is now mostly obsolete in the current version of
latexmk, since it has a better method of searching for files using the kpsewhich
command. However, if your system is an unusual one without the kpsewhich command,
you may need to set the variable @BIBINPUTS.

$biber ["biber %O %S"]
The biber processing program.

$biber_silent_switch ["--onlylog"]
Switch(es) for the biber processing program when silent mode is on.

$bibtex ["bibtex %O %S"]
The BibTeX processing program.

$bibtex_silent_switch ["-terse"]
Switch(es) for the BibTeX processing program when silent mode is on.

$bibtex_use [1]
Under what conditions to run BibTeX or biber. When latexmk discovers from the log
file that one (or more) BibTeX/biber-generated bibliographies are used, it can run
BibTeX or biber whenever it appears necessary to regenerate the bbl file(s) from
their source bib database file(s).

But sometimes, the bib file(s) are not available (e.g., for a document obtained
from an external archive), but the bbl files are provided. In that case use of
BibTeX or biber will result in incorrect overwriting of the precious bbl files.
The variable $bibtex_use controls whether this happens. Its possible values are:
0: never use BibTeX or biber. 1: only use BibTeX or biber if the bib files exist.
2: run BibTeX or biber whenever it appears necessary to update the bbl files,
without testing for the existence of the bib files.

$cleanup_includes_cusdep_generated [0]
If nonzero, specifies that cleanup also deletes files that are generated by custom
dependencies. (When doing a clean up, e.g., by use of the -C option, custom
dependencies are those listed in the .fdb_latexmk file from a previous run.)

$cleanup_includes_generated [0]
If nonzero, specifies that cleanup also deletes files that are detected in log file
as being generated (see the \openout lines in the log file). It will also include
files made from these first generation generated files.

$cleanup_mode [0]
If nonzero, specifies cleanup mode: 1 for full cleanup, 2 for cleanup except for
dvi, ps and pdf files, 3 for cleanup except for dep and aux files. (There is also
extra cleaning as specified by the $clean_ext, $clean_full_ext and @generated_exts
variables.)

This variable is equivalent to specifying one of the -c or -C options. But there
should be no need to set this variable from an RC file.

$clean_ext [""]
Extra extensions of files for latexmk to remove when any of the clean-up options
(-c or -C) is selected. The value of this variable is a string containing the
extensions separated by spaces.

It is also possible to specify a more general pattern of file to be deleted, by
using the place holder %R, as in commands, and it is also possible to use
wildcards. Thus setting

$clean_ext = "out %R-blx.bib %R-figures*.log";

in an initialization file will imply that when a clean-up operation is specified,
not only is the standard set of files deleted, but also files of the form FOO.out,
FOO-blx.bib, and %R-figures*.log, where FOO stands for the basename of the file
being processed (as in FOO.tex).

$clean_full_ext [""]
Extra extensions of files for latexmk to remove when the -C option is selected,
i.e., extensions of files to remove when the .dvi, etc files are to be cleaned-up.

More general patterns are allowed, as for $clean_ext.

$compiling_cmd [undefined], $failure_cmd [undefined], $success_cmd [undefined]

These variables specify commands that are executed at certain points of
compilations during preview-continuous mode. One motivation for their existance is
to allow convenient visual indications of compilation status even when the window
receiving the screen output of the compilation is hidden.

The commands are executed at the following points: $compiling_cmd at the start of
compilation, $success_cmd at the end of a successful compilation, and $failure_cmd
at the end of an unsuccessful compilation. If any of above variables is undefined
(the default situation) or blank, then the corresponding command is not executed.

An example of a typical setting of these variables is as follows

$compiling_cmd = "xdotool search --name \"%D\" set_window --name \"%D
compiling\"";
$success_cmd = "xdotool search --name \"%D\" set_window --name \"%D OK\"";
$failure_cmd = "xdotool search --name \"%D\" set_window --name \"%D
FAILURE\"";

These assume that the program xdotool is installed, that the previewer is using an
X-Window system for display, and that the title of the window contains the name of
the displayed file, as it normally does. When the commands are executed, the
placeholder string %D is replaced by the name of the destination file, which is the
previewed file. The above commands result in an appropriate string being appended
to the filename in the window title: " compiling", " OK", or " FAILURE".

Other placeholders that can be used are %S, %T, and %R, with %S and %T normally
being identical. These can be useful for a command changing the title of the edit
window. The visual indication in a window title can useful, since the user does not
have to keep shifting attention to the (possibly hidden) compilation window to know
the status of the compilation.

@cus_dep_list [()]
Custom dependency list -- see section on "Custom Dependencies".

@default_files [("*.tex")]
Default list of files to be processed.

Normally, if no filenames are specified on the command line, latexmk processes all
tex files specified in the @default_files variable, which by default is set to all
tex files ("*.tex") in the current directory. This is a convenience: just run
latexmk and it will process an appropriate set of files. But sometimes you want
only some of these files to be processed. In this case you set the @default_files
in an initialization file (e.g., the file "latexmkrc" in the current directory).
Then if no files are specified on the command line then the files you specify by
setting @default_files are processed.

Three examples:

@default_files = ("paper_current");

@default_files = ("paper1", "paper2.tex");

@default_files = ("*.tex", "*.dtx");

Note that more than file may be given, and that the default extension is ".tex".
Wild cards are allowed. The parentheses are because @default_files is an array
variable, i.e., a sequence of filename specifications is possible.

$dependents_phony [0]
If a list of dependencies is output, this variable determines whether to include a
phony target for each source file. If you use the dependents list in a Makefile,
the dummy rules work around errors make gives if you remove header files without
updating the Makefile to match.

$dependents_list [0]
Whether to display a list(s) of dependencies at the end of a run.

$deps_file ["-"]
Name of file to receive list(s) of dependencies at the end of a run, to be used if
$dependesnt_list is set. If the filename is "-", then the dependency list is set
to stdout (i.e., normally the screen).

$do_cd [0]
Whether to change working directory to the directory specified for the main source
file before processing it. The default behavior is not to do this, which is the
same as the behavior of latex and pdflatex programs. This variable is set by the
-cd and -cd- options on latexmk's command line.

$dvi_filter [empty]
The dvi file filter to be run on the newly produced dvi file before other
processing. Equivalent to specifying the -dF option.

$dvi_mode [See below for default]
If nonzero, generate a dvi version of the document. Equivalent to the -dvi option.

The variable $dvi_mode defaults to 0, but if no explicit requests are made for
other types of file (postscript, pdf), then $dvi_mode will be set to 1. In
addition, if a request for a file for which a .dvi file is a prerequisite, then
$dvi_mode will be set to 1.

$dvi_previewer ["start xdvi %O %S" under UNIX]
The command to invoke a dvi-previewer. [Default is "start" under MS-WINDOWS; under
more recent versions of Windows, this will cause to be run whatever command the
system has associated with .dvi files.]

Important note: Normally you will want to have a previewer run detached, so that
latexmk doesn't wait for the previewer to terminate before continuing its work. So
normally you should prefix the command by "start ", which flags to latexmk that it
should do the detaching of the previewer itself (by whatever method is appropriate
to the operating system). But sometimes letting latexmk do the detaching is not
appropriate (for a variety of non-trivial reasons), so you should put the "start "
bit in yourself, whenever it is needed.

$dvi_previewer_landscape ["start xdvi %O %S"]
The command to invoke a dvi-previewer in landscape mode. [Default is "start" under
MS-WINDOWS; under more recent versions of Windows, this will cause to be run
whatever command the system has associated with .dvi files.]

$dvipdf ["dvipdf %O %S %D"]
Command to convert dvi to pdf file. A common reconfiguration is to use the dvipdfm
command, which needs its arguments in a different order:

$dvipdf = "dvipdfm %O -o %D %S";

WARNING: The default dvipdf script generates pdf files with bitmapped fonts, which
do not look good when viewed by acroread. That script should be modified to give
dvips the options "-P pdf" to ensure that type 1 fonts are used in the pdf file.

$dvipdf_silent_switch ["-q"]
Switch(es) for dvipdf program when silent mode is on.

N.B. The standard dvipdf program runs silently, so adding the silent switch has no
effect, but is actually innocuous. But if an alternative program is used, e.g.,
dvipdfmx, then the silent switch has an effect. The default setting is correct for
dvipdfm and dvipdfmx.

$dvips ["dvips %O -o %D %S"]
The program to used as a filter to convert a .dvi file to a .ps file. If pdf is
going to be generated from pdf, then the value of the $dvips_pdf_switch -- see
below -- will be included in the options substituted for "%O".

$dvips_landscape ["dvips -tlandscape %O -o %D %S"]
The program to used as a filter to convert a .dvi file to a .ps file in landscape
mode.

$dvips_pdf_switch ["-P pdf"]
Switch(es) for dvips program when pdf file is to be generated from ps file.

$dvips_silent_switch ["-q"]
Switch(es) for dvips program when silent mode is on.

$dvi_update_command [""]
When the dvi previewer is set to be updated by running a command, this is the
command that is run. See the information for the variable $dvi_update_method for
further information, and see information on the variable $pdf_update_method for an
example for the analogous case of a pdf previewer.

$dvi_update_method [2 under UNIX, 1 under MS-Windows]
How the dvi viewer updates its display when the dvi file has changed. The values
here apply equally to the $pdf_update_method and to the $ps_update_method
variables.
0 => update is automatic,
1=> manual update by user, which may only mean a mouse click on the viewer's
window or may mean a more serious action.
2 => Send the signal, whose number is in the variable $dvi_update_signal. The
default value under UNIX is suitable for xdvi.
3 => Viewer cannot do an update, because it locks the file. (As with acroread
under MS-Windows.)
4 => run a command to do the update. The command is specified by the variable
$dvi_update_command.

See information on the variable $pdf_update_method for an example of updating by
command.

$dvi_update_signal [Under UNIX: SIGUSR1, which is a system-dependent value]
The number of the signal that is sent to the dvi viewer when it is updated by
sending a signal -- see the information on the variable $dvi_update_method. The
default value is the one appropriate for xdvi on a UNIX system.

$failure_cmd [undefined]
See the documentation for $compiling_cmd.

$fdb_ext ["fdb_latexmk"]
The extension of the file which latexmk generates to contain a database of
information on source files. You will not normally need to change this.

$force_mode [0]
If nonzero, continue processing past minor latex errors including unrecognized
cross references. Equivalent to specifying the -f option.

@generated_exts [( aux , bbl , idx , ind , lof , lot , out , toc , $fdb_ext )]
This contains a list of extensions for files that are generated during a LaTeX run
and that are read in by LaTeX in later runs, either directly or indirectly.

This list has two uses: (a) to set the kinds of file to be deleted in a cleanup
operation (with the -c, -C, -CA, -g and -gg options), and (b) in the determination
of whether a rerun of (pdf)LaTeX is needed after a run that gives an error.

(Normally, a change of a source file during a run should provoke a rerun. This
includes a file generated by LaTeX, e.g., an aux file, that is read in on
subsequent runs. But after a run that results in an error, a new run should occur
until the user has made a change in the files. But the user may have corrected an
error in a source .tex file during the run. So latexmk needs to distinguish user-
generated and automatically generated files; it determines the automatically
generated files as those with extensions in the list in @generated_exts.)

A convenient way to add an extra extension to the list, without losing the already
defined ones is to use a push command in the line in an RC file. E.g.,

push @generated_exts, "end";

adds the extension "end" to the list of predefined generated extensions. (This
extension is used by the RevTeX package, for example.)

$go_mode [0]
If nonzero, process files regardless of timestamps, and is then equivalent to the
-g option.

%hash_calc_ignore_pattern
!!!This variable is for experts only!!!

The general rule latexmk uses for determining when an extra run of some program is
needed is that one of the source files has changed. But consider for example a
latex package that causes an encapsulated postscript file (an "eps" file) to be
made that is to be read in on the next run. The file contains a comment line
giving its creation date and time. On the next run the time changes, latex sees
that the eps file has changed, and therefore reruns latex. This causes an infinite
loop, that is only terminated because latexmk has a limit on the number of runs to
guard against pathological situations.

But the changing line has no real effect, since it is a comment. You can instruct
latex to ignore the offending line as follows:

$hash_calc_ignore_pattern{'eps'} = '^%%CreationDate: ';

This creates a rule for files with extension .eps about lines to ignore. The left-
hand side is a Perl idiom for setting an item in a hash. Note that the file
extension is specified without a period. The value, on the right-hand side, is a
string containing a regular expresssion. (See documentation on Perl for how they
are to be specified in general.) This particular regular expression specifies that
lines beginning with "%%CreationDate: " are to be ignored in deciding whether a
file of the given extension .eps has changed.

There is only one regular expression available for each extension. If you need
more one pattern to specify lines to ignore, then you need to combine the patterns
into a single regular expression. The simplest method is separate the different
simple patterns by a vertical bar character (indicating "alternation" in the jargon
of regular expressions). For example,

$hash_calc_ignore_pattern{'eps'} = '^%%CreationDate: |^%%Title: ';

causes lines starting with either "^%%CreationDate: " or "^%%Title: " to be
ignored.

It may happen that a pattern to be ignored is specified in, for example, in a
system or user initialization file, and you wish to remove this in a file read
later. To do this, you use Perl's delete function, e.g.,

delete $hash_calc_ignore_pattern{'eps'};

$kpsewhich ["kpsewhich %S"]
The program called to locate a source file when the name alone is not sufficient.
Most filenames used by latexmk have sufficient path information to be found
directly. But sometimes, notably when .bib files are found from the log file of a
bibtex or biber run, the name of the file, but not its path is known. The program
specified by $kpsewhich is used to find it.

See also the @BIBINPUTS variable for another way that latexmk also uses to try to
locate files; it applies only in the case of .bib files.

$landscape_mode [0]
If nonzero, run in landscape mode, using the landscape mode previewers and dvi to
postscript converters. Equivalent to the -l option. Normally not needed with
current previewers.

$latex ["latex %O %S"]
The LaTeX processing program. Note that as with other programs, you can use this
variable not just to change the name of the program used, but also specify options
to the program. E.g.,

$latex = "latex --src-specials";

%latex_input_extensions
This variable specifies the extensions tried by latexmk when it finds that a LaTeX
run resulted in an error that a file has not been found, and the file is given
without an extension. This typically happens when LaTeX commands of the form
\input{file} or \includegraphics{figure}, when the relevant source file does not
exist.

In this situation, latexmk searches for custom dependencies to make the missing
file(s), but restricts it to the extensions specified by the variable
%latex_input_extensions. The default extensions are 'tex' and 'eps'.

(For Perl experts: %latex_input_extensions is a hash whose keys are the extensions.
The values are irrelevant.) Two subroutines are provided for manipulating this and
the related variable %pdflatex_input_extensions, add_input_ext and
remove_input_ext. They are used as in the following examples are possible lines in
an initialization file:

remove_input_ext( 'latex', 'tex' );

removes the extension 'tex' from latex_input_extensions

add_input_ext( 'latex', 'asdf' );

add the extension 'asdf to latex_input_extensions. (Naturally with such an
extension, you should have made an appropriate custom dependency for latexmk, and
should also have done the appropriate programming in the LaTeX source file to
enable the file to be read. The standard extensions are handled by LaTeX and its
graphics/graphicx packages.

$latex_silent_switch ["-interaction=batchmode"]
Switch(es) for the LaTeX processing program when silent mode is on.

If you use MikTeX, you may prefer the results if you configure the options to
include -c-style-errors, e.g., by the following line in an initialization file

$latex_silent_switch = "-interaction=batchmode -c-style-errors";

$lpr ["lpr %O %S" under UNIX/LINUX, "NONE lpr" under MS-WINDOWS]
The command to print postscript files.

Under MS-Windows (unlike UNIX/LINUX), there is no standard program for printing
files. But there are ways you can do it. For example, if you have gsview
installed, you could use it with the option "/p":

$lpr = '"c:/Program Files/Ghostgum/gsview/gsview32.exe" /p';

If gsview is installed in a different directory, you will need to make the
appropriate change. Note the combination of single and double quotes around the
name. The single quotes specify that this is a string to be assigned to the
configuration variable $lpr. The double quotes are part of the string passed to
the operating system to get the command obeyed; this is necessary because one part
of the command name ("Program Files") contains a space which would otherwise be
misinterpreted.

$lpr_dvi ["NONE lpr_dvi"]
The printing program to print dvi files.

$lpr_pdf ["NONE lpr_pdf"]
The printing program to print pdf files.

Under MS-Windows you could set this to use gsview, if it is installed, e.g.,

$lpr = '"c:/Program Files/Ghostgum/gsview/gsview32.exe" /p';

If gsview is installed in a different directory, you will need to make the
appropriate change. Note the double quotes around the name: this is necessary
because one part of the command name ("Program Files") contains a space which would
otherwise be misinterpreted.

$make ["make"]
The make processing program.

$makeindex ["makeindex %O -o %D %S"]
The index processing program.

$makeindex_silent_switch ["-q"]
Switch(es) for the index processing program when silent mode is on.

$max_repeat [5]
The maximum number of times latexmk will run latex/pdflatex before deciding that
there may be an infinite loop and that it needs to bail out, rather than rerunning
latex/pdflatex again to resolve cross-references, etc. The default value covers
all normal cases.

(Note that the "etc" covers a lot of cases where one run of latex/pdflatex
generates files to be read in on a later run.)

$MSWin_back_slash [1]
This configuration variable only has an effect when latexmk is running under MS-
Windows. It determines whether, when a command is executed under MS-Windows, there
should be substituted "\" for the separator character between components of a
directory name. Internally, latexmk uses "/" for the directory separator
character, which is the character used by Unix-like systems.

For many programs under MS-Windows, both "\" and "/" are acceptable as the
directory separator character. But some programs only accept "\". So for safety
latexmk makes a translation, by default. It is conceivable that under certain
situations this is undesirable, so the configuration can be changed. (A possible
example might be when some of the software is implemented using Cygwin, which
provides an Unix-like environment inside MS-Windows.)

$new_viewer_always [0]
This variable applies to latexmk only in continuous-preview mode. If
$new_viewer_always is 0, latexmk will check for a previously running previewer on
the same file, and if one is running will not start a new one. If
$new_viewer_always is non-zero, this check will be skipped, and latexmk will behave
as if no viewer is running.

$out_dir [""]
The directory in which output files are to be written by a run of (pdf)latex. See
also the variable $aux_dir.

The effect of this variable (when non-blank) is achieved by using the -output-
directory option of (pdf)latex. This exists in the usual current (Dec. 2011 and
later) implementations of TeX, i.e., MiKTeX and TeXLive. But it may not be present
in other versions.

Commonly, the directory specified for output files is a subdirectory of the current
working directory. However, if you specify some other directory, e.g., "/tmp/foo"
or "../output", be aware that this could cause problems, e.g., with makeindex or
bibtex. This is because modern versions of these programs, by default, will refuse
to work when they find that they are asked to write to a file in a directory that
appears not to be the current working directory or one of its subdirectories. This
is part of security measures by the whole TeX system that try to prevent malicious
or errant TeX documents from incorrectly messing with a user's files. If for
$out_dir or $aux_dir you really do need to specify an absolute pathname (e.g.,
"/tmp/foo") or a path (e.g., "../output") that includes a higher-level directory,
then you need to disable the security measures (and assume any risks). This can be
done by temporarily setting the operating system's environment variable openout_any
to "a" (as in "all"), to override the default "paranoid" setting.

$pdf_mode [0]
If zero, do NOT generate a pdf version of the document. If equal to 1, generate a
pdf version of the document using pdflatex. If equal to 2, generate a pdf version
of the document from the ps file, by using the command specified by the $ps2pdf
variable. If equal to 3, generate a pdf version of the document from the dvi file,
by using the command specified by the $dvipdf variable.

Equivalent to the -pdf-, -pdf, -pdfdvi, -pdfps options.

$pdflatex ["pdflatex %O %S"]
The LaTeX processing program in a version that makes a pdf file instead of a dvi
file.

An example of the use of this variable is to arrange for lualatex, xelatex or some
similar program to be used instead of pdflatex. Note that lualatex and xelatex
only produce .pdf files (and not .dvi), so to use them you will also need to turn
on production of .pdf files, and to turn off the production of .dvi (and .ps)
files, either by command line options or by suitable settings in a configuration
file. Thus to use lualatex, the following settings are appropriate:

$pdflatex = "lualatex %O %S";
$pdf_mode = 1; $postscript_mode = $dvi_mode = 0;

To use xelatex, the corresponding settings are:

$pdflatex = "xelatex %O %S";
$pdf_mode = 1; $postscript_mode = $dvi_mode = 0;

Another use of the same variable is to add certain options to the command line for
the program, e.g.,

$pdflatex = "pdflatex --shell-escape %O %S";

%pdflatex_input_extensions
This variable specifies the extensions tried by latexmk when it finds that a
pdflatex run resulted in an error that a file has not been found, and the file is
given without an extension. This typically happens when LaTeX commands of the form
\input{file} or \includegraphics{figure}, when the relevant source file does not
exist.

In this situation, latexmk searches for custom dependencies to make the missing
file(s), but restricts it to the extensions specified by the variable
%pdflatex_input_extensions. The default extensions are 'tex', 'pdf', 'jpg, and
'png'.

(For Perl experts: %pdflatex_input_extensions is a hash whose keys are the
extensions. The values are irrelevant.) Two subroutines are provided for
manipulating this and the related variable %latex_input_extensions, add_input_ext
and remove_input_ext. They are used as in the following examples are possible
lines in an initialization file:

remove_input_ext( 'pdflatex', 'tex' );

removes the extension 'tex' from pdflatex_input_extensions

add_input_ext( 'pdflatex', 'asdf' );

add the extension 'asdf to pdflatex_input_extensions. (Naturally with such an
extension, you should have made an appropriate custom dependency for latexmk, and
should also have done the appropriate programming in the LaTeX source file to
enable the file to be read. The standard extensions are handled by pdflatex and
its graphics/graphicx packages.)

$pdflatex_silent_switch ["-interaction=batchmode"]
Switch(es) for the pdflatex program (specified in the variable $pdflatex when
silent mode is on.

If you use MikTeX, you may prefer the results if you configure the options to
include -c-style-errors, e.g., by the following line in an initialization file

$latex_silent_switch = "-interaction=batchmode -c-style-errors";

$pdf_previewer ["start acroread %O %S"]
The command to invoke a pdf-previewer.

On MS-WINDOWS, the default is changed to "cmd /c start """; under more recent
versions of Windows, this will cause to be run whatever command the system has
associated with .pdf files. But this may be undesirable if this association is to
acroread -- see the notes in the explanation of the -pvc option.]

On OS-X the default is changed to "open %S", which results in OS-X starting up (and
detaching) the viewer associated with the file. By default, for pdf files this
association is to OS-X's preview, which is quite satisfactory.

WARNING: Problem under MS-Windows: if acroread is used as the pdf previewer, and
it is actually viewing a pdf file, the pdf file cannot be updated. Thus makes
acroread a bad choice of previewer if you use latexmk's previous-continuous mode
(option -pvc) under MS-windows. This problem does not occur if, for example,
SumatraPDF or gsview is used to view pdf files.

Important note: Normally you will want to have a previewer run detached, so that
latexmk doesn't wait for the previewer to terminate before continuing its work. So
normally you should prefix the command by "start ", which flags to latexmk that it
should do the detaching of the previewer itself (by whatever method is appropriate
to the operating system). But sometimes letting latexmk do the detaching is not
appropriate (for a variety of non-trivial reasons), so you should put the "start "
bit in yourself, whenever it is needed.

$pdf_update_command [""]
When the pdf previewer is set to be updated by running a command, this is the
command that is run. See the information for the variable $pdf_update_method.

$pdf_update_method [1 under UNIX, 3 under MS-Windows]
How the pdf viewer updates its display when the pdf file has changed. See the
information on the variable $dvi_update_method for the codes. (Note that
information needs be changed slightly so that for the value 4, to run a command to
do the update, the command is specified by the variable $pdf_update_command, and
for the value 2, to specify update by signal, the signal is specified by
$pdf_update_signal.)

Note that acroread under MS-Windows (but not UNIX) locks the pdf file, so the
default value is then 3.

Arranging to use a command to get a previewer explicitly updated requires three
variables to be set. For example:

$pdf_previewer = "start xpdf -remote %R %O %S";
$pdf_update_method = 4;
$pdf_update_command = "xpdf -remote %R -reload";

The first setting arranges for the xpdf program to be used in its "remote server
mode", with the server name specified as the rootname of the TeX file. The second
setting arranges for updating to be done in response to a command, and the third
setting sets the update command.

$pdf_update_signal [Under UNIX: SIGHUP, which is a system-dependent value]
The number of the signal that is sent to the pdf viewer when it is updated by
sending a signal -- see the information on the variable $pdf_update_method. The
default value is the one appropriate for gv on a UNIX system.

$pid_position[1 under UNIX, -1 under MS-Windows]
The variable $pid_position is used to specify which word in lines of the output
from $pscmd corresponds to the process ID. The first word in the line is numbered
0. The default value of 1 (2nd word in line) is correct for Solaris 2.6 and Linux.
Setting the variable to -1 is used to indicate that $pscmd is not to be used.

$postscript_mode [0]
If nonzero, generate a postscript version of the document. Equivalent to the -ps
option.

If some other request is made for which a postscript file is needed, then
$postscript_mode will be set to 1.

$preview_continuous_mode [0]
If nonzero, run a previewer to view the document, and continue running latexmk to
keep .dvi up-to-date. Equivalent to the -pvc option. Which previewer is run
depends on the other settings, see the command line options -view=, and the
variable $view.

$preview_mode [0]
If nonzero, run a previewer to preview the document. Equivalent to the -pv option.
Which previewer is run depends on the other settings, see the command line options
-view=, and the variable $view.

$printout_mode [0]
If nonzero, print the document using lpr. Equivalent to the -p option. This is
recommended not to be set from an RC file, otherwise you could waste lots of paper.

$print_type = ["auto"]
Type of file to printout: possibilities are "auto", "dvi", "none", "pdf", or "ps".
See the option -print= for the meaning of the "auto" value.

$pscmd Command used to get all the processes currently run by the user. The -pvc option
uses the command specified by the variable $pscmd to determine if there is an
already running previewer, and to find the process ID (needed if latexmk needs to
signal the previewer about file changes).

Each line of the output of this command is assumed to correspond to one process.
See the $pid_position variable for how the process number is determined.

The default for pscmd is "NONE" under MS-Windows and cygwin (i.e., the command is
not used), "ps --width 200 -f -u $ENV{USER}" under linux, "ps -ww -u $ENV{USER}"
under darwin (Macintosh OS-X), and "ps -f -u $ENV{USER}" under other operating
systems (including other flavors of UNIX). In these specifications "$ENV{USER}" is
substituted by the username.

$ps2pdf ["ps2pdf %O %S %D"]
Command to convert ps to pdf file.

$ps_filter [empty]
The postscript file filter to be run on the newly produced postscript file before
other processing. Equivalent to specifying the -pF option.

$ps_previewer ["start gv %O %S", but start %O %S under MS-WINDOWS]
The command to invoke a ps-previewer. (The default under MS-WINDOWS will cause to
be run whatever command the system has associated with .ps files.)

Note that gv could be used with the -watch option updates its display whenever the
postscript file changes, whereas ghostview does not. However, different versions
of gv have slightly different ways of writing this option. You can configure this
variable appropriately.

WARNING: Linux systems may have installed one (or more) versions of gv under
different names, e.g., ggv, kghostview, etc, but perhaps not one called gv.

Important note: Normally you will want to have a previewer run detached, so that
latexmk doesn't wait for the previewer to terminate before continuing its work. So
normally you should prefix the command by "start ", which flags to latexmk that it
should do the detaching of the previewer itself (by whatever method is appropriate
to the operating system). But sometimes letting latexmk do the detaching is not
appropriate (for a variety of non-trivial reasons), so you should put the "start "
bit in yourself, whenever it is needed.

$ps_previewer_landscape ["start gv -swap %O %S", but start %O %S under MS-WINDOWS]
The command to invoke a ps-previewer in landscape mode.

$ps_update_command [""]
When the postscript previewer is set to be updated by running a command, this is
the command that is run. See the information for the variable $ps_update_method.

$ps_update_method [0 under UNIX, 1 under MS-Windows]
How the postscript viewer updates its display when the ps file has changed. See the
information on the variable $dvi_update_method for the codes. (Note that
information needs be changed slightly so that for the value 4, to run a command to
do the update, the command is specified by the variable $ps_update_command, and for
the value 2, to specify update by signal, the signal is specified by
$ps_update_signal.)

$ps_update_signal [Under UNIX: SIGHUP, which is a system-dependent value]
The number of the signal that is sent to the pdf viewer when it is updated by
sending a signal -- see $ps_update_method. The default value is the one
appropriate for gv on a UNIX system.

$pvc_view_file_via_temporary [1]
The same as $always_view_file_via_temporary, except that it only applies in
preview-continuous mode (-pvc option).

$quote_filenames [1]
This specifies whether substitutions for placeholders in command specifications (as
in $pdflatex) are surrounded by double quotes. If this variable is 1 (or any other
value Perl regards as true), then quoting is done. Otherwise quoting is omitted.

The quoting method used by latexmk is tested to work correctly under UNIX systems
(including Linux and Mac OS-X) and under MS-Windows. It allows the use of
filenames containing special characters, notably spaces. (But note that many
versions of LaTeX and PdfLaTeX cannot correctly deal with TeX files whose names
contain spaces. Latexmk's quoting only ensures that such filenames are correctly
treated by the operating system in passing arguments to programs.)

$recorder [0]
Whether to use the -recorder option to latex and pdflatex. Use of this option
results in a file of extension .fls containing a list of the files that these
programs have read and written. Latexmk will then use this file to improve its
detection of source files and generated files after a run of latex or pdflatex.

It is generally recommended to use this option (or to configure the $recorder
variable to be on.) But it only works if (pdf)latex supports the -recorder option,
which is true for most current implementations

Note about the name of the .fls file: Most implementations of (pdf)latex produce an
.fls file with the same basename as the main document's LaTeX, e.g., for
Document.tex, the .fls file is Document.fls. However, some implementations instead
produce files named for the program, i.e., latex.fls or pdflatex.fls. In this
second case, latexmk copies the latex.fls or pdflatex.fls to a file with the
basename of the main LaTeX document, e.g., Document.fls.

$search_path_separator [See below for default]
The character separating paths in the environment variables TEXINPUTS, BIBINPUTS,
and BSTINPUTS. This variable is mainly used by latexmk when the -outdir, -output-
directory, -auxdir, and/or -aux-directory options are used. In that case latexmk
needs to communicate appropriately modified search paths to $bibtex, dvipdf, dvips,
and (pdf)latex.

[Comment to technically savvy readers: (pdf)latex doesn't actually need the
modified search path, because it corrects it internally. But, surprisingly, dvipdf
and dvips do, because sometimes graphics files get generated in the output or aux
directories.]

The default under MSWin and Cygwin is ';' and under UNIX-like operating systems
(including Linux and OS-X) is ':'. Normally the defaults give correct behavior.
But there can be difficulties if your operating system is of one kind, but some of
your software is running under an emulator for the other kind of operating system;
in that case you'll need to find out what is needed, and set $search_path_separator
explicitly. (The same goes, of course, for unusual operating systems that are not
in the MSWin, Linux, OS-X, Unix collection.)

$silence_logfile_warnings [0]
Whether after a run of (pdf)latex to summarize warnings in the log file about
undefined citations and references. Setting $silence_logfile_warnings=0 gives the
summary of warnings (provided silent mode isn't also set), and this is useful to
locate undefined citations and references without searching through the much more
verbose log file or the screen output of (pdf)latex. But the summary can also be
excessively annoying. The default is not to give these warnings. The command line
options -silence_logfile_warning_list and -silence_logfile_warning_list- also set
this variable.

Note that multiple occurrences for the same undefined object on the same page and
same line will be compressed to a single warning.

$silent [0]
Whether to run silently. Setting $silent to 1 has the same effect as the -quiet of
-silent options on the command line.

$sleep_time [2]
The time to sleep (in seconds) between checking for source file changes when
running with the -pvc option. This is subject to a minimum of one second delay,
except that zero delay is also allowed.

A value of exactly 0 gives no delay, and typically results in 100% CPU usage, which
may not be desirable.

$texfile_search [""]
This is an obsolete variable, replaced by the @default_files variable.

For backward compatibility, if you choose to set $texfile_search, it is a string of
space-separated filenames, and then latexmk replaces @default_files with the
filenames in $texfile_search to which is added "*.tex".

$success_cmd [undefined]
See the documentation for $compiling_cmd.

$tmpdir [See below for default]
Directory to store temporary files that latexmk may generate while running.

The default under MSWindows (including cygwin), is to set $tmpdir to the value of
the first of whichever of the system environment variables TMPDIR or TEMP exists,
otherwise to the current directory. Under other operating systems (expected to be
UNIX/Linux, including OS-X), the default is the value of the system environment
variable TMPDIR if it exists, otherwise "/tmp".

$use_make_for_missing_files [0]
Whether to use make to try and make files that are missing after a run of latex or
pdflatex, and for which a custom dependency has not been found. This is generally
useful only when latexmk is used as part of a bigger project which is built by
using the make program.

Note that once a missing file has been made, no further calls to make will be made
on a subsequent run of latexmk to update the file. Handling this problem is the
job of a suitably defined Makefile. See the section "USING latexmk WITH make" for
how to do this. The intent of calling make from latexmk is merely to detect
dependencies.

$view ["default"]
Which kind of file is to be previewed if a previewer is used. The possible values
are "default", "dvi", "ps", "pdf". The value of "default" means that the "highest"
of the kinds of file generated is to be used (among dvi, ps and pdf).

CUSTOM DEPENDENCIES

In any RC file a set of custom dependencies can be set up to convert a file with one
extension to a file with another. An example use of this would be to allow latexmk to
convert a .fig file to .eps to be included in the .tex file.

The old method of configuring latexmk was to directly manipulate the @cus_dep_list array
that contains information defining the custom dependencies. This method still works. But
now there are subroutines that allow convenient manipulations of the custom dependency
list. These are

add_cus_dep( fromextension, toextension, must, subroutine )
remove_cus_dep( fromextension, toextension )
show_cus_dep()

The custom dependency is a list of rules, each of which is specified as follow:

from extension:
The extension of the file we are converting from (e.g. "fig"). It is specified
without a period.

to extension:
The extension of the file we are converting to (e.g. "eps"). It is specified
without a period.

must: If non-zero, the file from which we are converting must exist, if it doesn't exist
latexmk will give an error message and exit unless the -f option is specified. If
must is zero and the file we are converting from doesn't exist, then no action is
taken.

function:
The name of the subroutine that latexmk should call to perform the file conversion.
The first argument to the subroutine is the base name of the file to be converted
without any extension. The subroutines are declared in the syntax of Perl. The
function should return 0 if it was successful and a nonzero number if it failed.

It is invoked whenever latexmk detects that a run of latex/pdflatex needs to read a file,
like a graphics file, whose extension is the to-extension of a custom dependency. Then
latexmk examines whether a file exists with the same name, but with the corresponding
from-extension, as specified in the custom-dependency rule. If it does, then whenever the
destination file (the one with the to-extension) is out-of-date with respect to the
corresponding source file.

To make the new destination file, the Perl subroutine specified in the rule is invoked,
with an argument that is the base name of the files in question. Simple cases just
involve a subroutine invoking an external program; this can be done by following the
templates below, even by those without knowledge of the Perl programming language. Of
course, experts could do something much more elaborate.

One other item in each custom-dependency rule labeled "must" above specifies how the rule
should be applied when the source file fails to exist.

A simple and typical example of code in an initialization rcfile is

add_cus_dep( 'fig', 'eps', 0, 'fig2eps' );
sub fig2eps {
system( "fig2dev -Leps \"$_[0].fig\" \"$_[0].eps\"" );
}

The first line adds a custom dependency that converts a file with extension "fig", as
created by the xfig program, to an encapsulated postscript file, with extension "eps".
The remaining lines define a subroutine that carries out the conversion. If a rule for
converting "fig" to "eps" files already exists (e.g., from a previously read-in
initialization file), the latexmk will delete this rule before making the new one.

Suppose latexmk is using this rule to convert a file "figure.fig" to "figure.eps". Then
it will invoke the fig2eps subroutine defined in the above code with a single argument
"figure", which is the basename of each of the files (possibly with a path component).
This argument is referred to by Perl as $_[0]. In the example above, the subroutine uses
the Perl command system to invoke the program fig2dev. The double quotes around the
string are a Perl idiom that signify that each string of the form of a variable name,
$_[0] in this case, is to be substituted by its value.

If the return value of the subroutine is non-zero, then latexmk will assume an error
occurred during the execution of the subroutine. In the above example, no explicit return
value is given, and instead the return value is the value returned by the last (and only)
statement, i.e., the invocation of system, which returns the value 0 on success.

If you use pdflatex instead of latex, then you will probably prefer to convert your
graphics files to pdf format, in which case you would replace the above code in an
initialization file by

add_cus_dep( 'fig', 'pdf, 0, 'fig2pdf' );
sub fig2pdf {
system( "fig2dev -Lpdf \"$_[0].fig\" \"$_[0].pdf\"" );
}

Note 1: In the command lines given in the system commands in the above examples, double
quotes have been inserted around the file names (implemented by '\"' in the Perl
language). They immunize the running of the program against special characters in
filenames. Very often these quotes are not necessary, i.e., they can be omitted. But it
is normally safer to keep them in. Even though the rules for quoting vary between
operating systems, command shells and individual pieces of software, the quotes in the
above examples do not cause problems in the cases I have tested.

Note 2: One case in which the quotes are important is when the files are in a subdirectory
and your operating system is Microsoft Windows. Then the separator character for
directory components can be either a forward slash '/' or Microsoft's more usual backward
slash ´\'. Forward slashes are generated by latexmk, to maintain its sanity from software
like MiKTeX that mixes both directory separators; but their correct use normally requires
quoted filenames. (See a log file from a run of MiKTeX (at least in v. 2.9) for an
example of the use of both directory separators.)

If you have some general custom dependencies defined in the system or user initialization
file, you may find that for a particular project they are undesirable. So you might want
to delete the unneeded ones. For example, you remove any "fig" to "eps" rule by the line

remove_cus_dep( 'fig', 'eps' );

If you have complicated sets of custom dependencies, you may want to get a listing of the
custom dependencies. This is done by using the line

show_cus_dep();

in an initialization file.

Another example of a custom dependency overcomes a limitation of latexmk concerning index
files. The only index-file conversion built-in to latexmk is from an ".idx" file written
on one run of latex/pdflatex to an ".ind" file to be read in on a subsequent run. But
with the index.sty package you can create extra indexes with extensions that you
configure. Latexmk does not know how to deduce the extensions from the information it
has. But you can easily write a custom dependency. For example if your latex file uses
the command "\newindex{special}{ndx}{nnd}{Special index}" you will need to convert files
with the extension .ndx to .nnd. The following lines in an initialization RC file will
cause this to happen:

add_cus_dep('ndx', 'nnd', 0, 'makendx2nnd');
sub makendx2nnd {
system( "makeindex -o \"$_[0].nnd\" \"$_[0].ndx\"" );
}

(You will need to modify this code if you use filenames with spaces in them, to provide
correct quoting of the filenames.)

Those of you with experience with Makefiles, will undoubtedly be concerned that the .ndx
file is written during a run of latex/pdflatex and is always later than the .nnd last read
in. Thus the .nnd appears to be perpetually out-of-date. This situation, of circular
dependencies, is endemic to latex, and latexmk in its current version works correctly with
circular dependencies. It examines the contents of the files (by use of an md5 checksum),
and only does a remake when the file contents have actually changed.

Of course if you choose to write random data to the .nnd (or and .aux file, etc) that
changes on each new run, then you will have a problem. For real experts: See the
%hash_cal_ignore_pattern if you have to deal with such problems.

Glossaries can be dealt with similarly.

OLD METHOD OF DEFINING CUSTOM DEPENDENCIES

In previous versions of latexmk, the only method of defining custom dependencies was to
directly manipulate the table of custom dependencies. This is contained in the
@cus_dep_list array. It is an array of strings, and each string in the array has four
items in it, each separated by a space, the from-extension, the to-extension, the "must"
item, and the name of the subroutine for the custom dependency. These were all defined
above.

An example of the old method of defining custom dependencies is as follows. It is the code
in an RC file to ensure automatic conversion of .fig files to .eps files:

push @cus_dep_list, "fig eps 0 fig2eps";
sub fig2eps {
system( "fig2dev -Lps \"$_[0].fig\" \"$_[0].eps\"" );
}

This method still works, and is equivalent to the earlier code using the add_cus_dep
subroutine, except that it doesn't delete any previous custom-dependency for the same
conversion. So the new method is preferable.

USING latexmk WITH make
This section is targeted only at advanced users who use the make program for complex
projects, as for software development, with the dependencies specified by a Makefile.

Now the basic task of latexmk is to run the appropriate programs to make a viewable
version of a LaTeX document. However, the usual make program is not suited to this
purpose for at least two reasons. First is that the use of LaTeX involves circular
dependencies (e.g., via .aux files), and these cannot be handled by the standard make
program. Second is that in a large document the set of source files can change quite
frequently, particularly with included graphics files; in this situation keeping a
Makefile manually updated is inappropriate and error-prone, especially when the
dependencies can be determined automatically. Latexmk solves both of these problems
robustly.

Thus for many standard LaTeX documents latexmk can be used by itself without the make
program. In a complex project it simply needs to be suitably configured. A standard
configuration would be to define custom dependencies to make graphics files from their
source files (e.g., as created by the xfig program). Custom dependencies are latexmk's
equivalent of pattern rules in Makefiles.

Nevertheless there are projects for which a Makefile is appropriate, and it is useful to
know how to use latexmk from a Makefile. A typical example would be to generate
documentation for a software project. Potentially the interaction with the rest of the
rules in the Makefile could be quite complicated, for example if some of the source files
for a LaTeX document are generated by the project's software.

In this section, I give a couple of examples of how latexmk can be usefully invoked from a
Makefile. The examples use specific features of current versions of GNU make, which is
the default on both linux and OS-X systems. They may need modifications for other
versions of make.

The simplest method is simply to delegate all the relevant tasks to latexmk, as is
suitable for a straightforward LaTeX document. For this a suitable Makefile is like

.PHONY : FORCE_MAKE
all : try.pdf
%.pdf : %.tex FORCE_MAKE
latexmk -pdf -dvi- -ps- $<

(Note: the last line must be introduced by a tab for the Makefile to function correctly!)
Naturally, if making try.pdf from its associated LaTeX file try.tex were the only task to
be performed, a direct use of latexmk without a Makefile would normally be better. The
benefit of using a Makefile for a LaTeX document would be in a larger project, where lines
such as the above would be only be a small part of a larger Makefile.

The above example has a pattern rule for making a .pdf file from a .tex file, and it is
defined to use latexmk in the obvious way. There is a conventional default target named
"all", with a prerequisite of try.pdf. So when make is invoked, by default it makes
try.pdf. The only complication is that there may be many source files beyond try.tex, but
these aren't specified in the Makefile, so changes in them will not by themselves cause
latexmk to be invoked. Instead, the pattern rule is equipped with a "phony" prerequisite
FORCE_MAKE; this has the effect of causing the rule to be always out-of-date, so that
latexmk is always run. It is latexmk that decides whether any action is needed, e.g., a
rerun of pdflatex. Effectively the Makefile delegates all decisions to latexmk, while
make has no knowledge of the list of source files except for primary LaTeX file for the
document. If there are, for example, graphics files to be made, these must be made by
custom dependencies configured in latexmk.

But something better is needed in more complicated situations, for example, when the
making of graphics files needs to be specified by rules in the Makefile. To do this, one
can use a Makefile like the following:

TARGETS = document1.pdf document2.pdf
DEPS_DIR = .deps
LATEXMK = latexmk -recorder -use-make -deps \
-e 'warn qq(In Makefile, turn off custom dependencies\n);' \
-e '@cus_dep_list = ();' \
-e 'show_cus_dep();'
all : $(TARGETS)
$(foreach file,$(TARGETS),$(eval -include $(DEPS_DIR)/$(file)P))
$(DEPS_DIR) :
mkdir $@
%.pdf : %.tex
if [ ! -e $(DEPS_DIR) ]; then mkdir $(DEPS_DIR); fi
$(LATEXMK) -pdf -dvi- -ps- -deps-out=$(DEPS_DIR)/$@P $<
%.pdf : %.fig
fig2dev -Lpdf $< $@

(Again, the lines containing the commands for the rules should be started with tabs.)
This example was inspired by how GNU automake handles automatic dependency tracking of C
source files.

After each run of latexmk, dependency information is put in a file in the .deps
subdirectory. The Makefile causes these dependency files to be read by make, which now
has the full dependency information for each target .pdf file. To make things less
trivial it is specificed that two files document1.pdf and document2.pdf are the targets.
The dependency files are .deps/document1.pdfP and .deps/document2.pdfP.

There is now no need for the phony prerequisite for the rule to make .pdf files from .tex
files. But I have added a rule to make .pdf files from .fig files produced by the xfig
program; these are commonly used for graphics insertions in LaTeX documents. Latexmk is
arranged to output a dependency file after each run. It is given the -recorder option,
which improves its detection of files generated during a run of pdflatex; such files
should not be in the dependency list. The -e options are used to turn off all custom
dependencies, and to document this. Instead the -use-make is used to delegate the making
of missing files to make itself.

Suppose in the LaTeX file there is a command \includegraphics{graph}, and an xfig file
"graph.fig" exists. On a first run, pdflatex reports a missing file, named "graph".
Latexmk succeeds in making "graph.pdf" by calling "make graph.pdf", and after completion
of its work, it lists "fig.pdf" among the dependents of the file latexmk is making. Then
let "fig.fig" be updated, and then let make be run. Make first remakes "fig.pdf", and
only then reruns latexmk.

Thus we now have a method by which all the subsidiary processing is delegated to make.

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