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- # ===========================================================================
- # https://www.gnu.org/software/autoconf-archive/ax_check_posix_regcomp.html
- # ===========================================================================
- #
- # SYNOPSIS
- #
- # AX_CHECK_POSIX_REGCOMP
- #
- # DESCRIPTION
- #
- # Check that the POSIX compliant regular expression compiler is available
- # in the POSIX specified manner, and it works. If it fails, we have a
- # backup -- use gnu-regex.
- #
- # LICENSE
- #
- # Copyright (c) 2008 Bruce Korb <bkorb@gnu.org>
- #
- # Copying and distribution of this file, with or without modification, are
- # permitted in any medium without royalty provided the copyright notice
- # and this notice are preserved. This file is offered as-is, without any
- # warranty.
-
- #serial 6
-
- AU_ALIAS([AG_CHECK_POSIX_REGCOMP], [AX_CHECK_POSIX_REGCOMP])
- AC_DEFUN([AX_CHECK_POSIX_REGCOMP],[
- AC_MSG_CHECKING([whether POSIX compliant regcomp()/regexec()])
- AC_CACHE_VAL([ax_cv_posix_regcomp],[
- AC_TRY_RUN([#include <sys/types.h>
- #include <regex.h>
- int main() {
- int flags = REG_EXTENDED|REG_ICASE|REG_NEWLINE;
- regex_t re;
- if (regcomp( &re, "^.*$", flags ) != 0)
- return 1;
- return regcomp( &re, "|no.*", flags ); }],[ax_cv_posix_regcomp=yes],[ax_cv_posix_regcomp=no],[ax_cv_posix_regcomp=no]
- ) # end of TRY_RUN]) # end of CACHE_VAL
-
- AC_MSG_RESULT([$ax_cv_posix_regcomp])
- if test x$ax_cv_posix_regcomp = xyes
- then
- AC_DEFINE(HAVE_POSIX_REGCOMP, 1,
- [Define this if POSIX compliant regcomp()/regexec()])
- fi
- ]) # end of AC_DEFUN of AX_CHECK_POSIX_REGCOMP
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