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PROGRAM:

NAME


ccconfig - Get Convert::Binary::C configuration for a compiler

SYNOPSIS


ccconfig options [-- compiler-options]

options:

-c
--cc compiler compiler executable to test
default: auto-determined

-o
--output-file file output filename
default: output to stdout

-f
--output-format format output format
default: dumper

--basename name basename of the temporary test files
default: _t_e_s_t

-I
--inc-path path manually set compiler include path

--preprocess rule compiler rule for preprocessing
--compile-obj rule compiler rule for compiling objects
--compile-exe rule compiler rule for compiling executables

--c-ext ext extension of C source files
--pp-ext ext extension of preprocessor output files
--obj-ext ext extension of object files
--exe-ext ext extension of executable files

--nodelete don't delete temporary files
--norun don't try to run executables
--quiet don't display anything
--nostatus don't display status indicator

--version print version number

--debug debug mode

Placeholders allowed in compiler rules:

%c C source file
%o object file
%e executable file
%i preprocessor output file
| result is written to stdout (only at end of rule)

DESCRIPTION


"ccconfig" will try to determine a usable configuration for Convert::Binary::C from
testing a compiler executable. It is not necessary that the binaries generated by the
compiler can be executed, so "ccconfig" can also be used for cross-compilers.

This tool is still experimental, and you should neither rely on its output without
checking, nor expect it to work in your environment.

OPTIONS


"--cc" compiler
This option allows you to explicitly specify a compiler executable. This is especially
useful if you don't want to use your system compiler. If this options is not given,
"ccconfig" tries to guess a compiler.

"--output-file" file
Write Convert::Binary::C configuration to the specified file. The default is to write the
configuration to "stdout".

"--output-format" format
Specify the output format of the Convert::Binary::C configuration. The following formats
are currently supported:

dumper Output a %config hash using Data::Dumper
require Output in a format suitable for require

The default is "dumper".

"--basename" name
Allows you to change the base name of the temporary test files. This is used along with
the various "-ext" options to build the filenames of C source files, preprocessor output
files, object files and executables.

"--inc-path" path
This option allows you to manually set the include path of the compiler. This is useful if
"ccconfig" cannot determine the include path automatically, most probably because it
cannot parse the preprocessor output. This option can be specified more than once.

"--preprocess" rule
Using this option, you can specify a rule that "ccconfig" uses to run the compiler to get
preprocessor output. Most compilers write the preprocessor output to standard output when
given the "-E" option, i.e.

cc -E foo.c

will preprocess foo.c to standard output. The corresponding rule for "ccconfig" would be:

ccconfig --preprocess='-E %c |'

The <%c> will be replaced with the C source filename, and the pipe symbol signals that the
result will be written to standard output.

The following placeholders can be used in "ccconfig" rules:

%c C source file
%o object file
%e executable file
%i preprocessor output file

Usually, "ccconfig" tries to figure out the correct rules on its own.

"--compile-obj" rule
Like "--preprocess", this option allows you to define a rule for how to compile an object
file. For most compilers, this rule will be something like

ccconfig --compile-obj='-c -o %o %c'

"--compile-exe" rule
Like "--preprocess", this option allows you to define a rule for how to compile an
executable file. For most compilers, this rule will be something like

ccconfig --compile-exe='-o %e %c'

Note that it is sufficient to specify either "--compile-obj" or "--compile-exe". So if
your compiler can only create object files, that's just fine.

"--c-ext"
This option is used along with "--basename" to build the name of a C source file. This is
usually set to ".c".

"--pp-ext"
This option is used along with "--basename" to build the name of a preprocessor output
file.

"--obj-ext"
This option is used along with "--basename" to build the name of an object file.

"--exe-ext"
This option is used along with "--basename" to build the name of an executable file.

"--nodelete"
Don't attempt to delete temporary files that have been created by the compiler. Normally,
"ccconfig" will look for all files with the same basename as the temporary test file and
delete them.

"--norun"
You can specify this option if the executables generated by your compiler cannot be run on
your machine, i.e. if you have a cross-compiler. However, "ccconfig" will automatically
find out that it cannot run the executables.

When this option is set, a different set of algorithms is used to determine a couple of
configuration settings. These algorithms are all based upon placing a special signature in
the object file. They are less reliable that the standard algorithms, so you shouldn't use
them unless you have to.

"--quiet"
Don't display anything except for the final configuration.

"--nostatus"
Hide the status indicator. Recommended if you want to redirect the script output to a
file:

ccconfig --nostatus >config.pl 2>ccconfig.log

"--version"
Writes the program name, version and path to standard output.

"--debug"
Generate tons of debug output. Don't use unless you know what you're doing.

EXAMPLES


Normally, a simple

ccconfig

without arguments is enough if you want the configuration for your system compiler. While
"ccconfig" is running, it will write lots of status information to "stderr". When it's
done, it will usually dump a Perl hash table to "stdout" which can be directly used as a
configuration for Convert::Binary::C.

If you want the configuration for a different compiler, or "ccconfig" cannot determine
your system compiler automatically, use

ccconfig -c gcc32

if your compiler's name is "gcc32".

If you want to pass additional options to the compiler, you can do so after a double-dash
on the command line:

ccconfig -- -g -DDEBUGGING

or

ccconfig -c gcc32 -- -ansi -fshort-enums

If you'd like to interface with the Perl core, you may find a suitable configuration using
something like:

ccconfig --cc=`perl -MConfig -e 'print $Config{cc}'` \
-- `perl -MConfig -e 'print $Config{ccflags}'`

COPYRIGHT


Copyright (c) 2002-2015 Marcus Holland-Moritz. All rights reserved. This program is free
software; you can redistribute it and/or modify it under the same terms as Perl itself.

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