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ifnames2.13 - print identifiers that a package uses in C preprocessor conditionals


ifnames2.13 [ --help | -h ] [ --macrodir=dir | -m dir ] [ --version ]


ifnames2.13 can help when writing a configure.in for a software package. It prints the
identifiers that the package already uses in C preprocessor conditionals. If a package
has already been set up to have some portability, this program can help you figure out
what its configure needs to check for. It may help fill in some gaps in a configure.in
generated by autoscan2.13 (see autoscan2.13(1)).

ifnames2.13 scans all of the C source files named on the command line (or the standard
input, if none are given) and writes to the standard output a sorted list of all the
identifiers that appear in those files in #if, #elif, #ifdef, or #ifndef directives. It
prints each identifier on a line, followed by a space-separated list of the files in which
that identifier occurs.

ifnames2.13 accepts the following options:


-h Print a summary of the command line options and exit.


-m DIR Look for the installed macro files in directory DIR. You can also set the
AC_MACRODIR environment variable to a directory; this option overrides the
environment variable.

Print the version number of Autoconf and exit.

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