Macro: ag_check_posix_regcomp

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# ag_check_posix_regcomp

## Synopsis

`AG_CHECK_POSIX_REGCOMP`

## Version

1.1 (2001/11/11) bkorb @ ac-archive-0.5.32

## Author

autogen.sf.net is a project of Bruce Korb <bkorb@gnu.org>

## Description

Check that the POSIX compliant regular expression compiler is available in the POSIX specified manner, and it works.

## M4 Source Code

    AC_DEFUN(AG_CHECK_POSIX_REGCOMP,[
      AC_MSG_CHECKING([whether POSIX compliant regcomp()/regexec()])
      AC_CACHE_VAL([ag_cv_posix_regcomp],[
      AC_TRY_RUN([#include <sys/types.h>
    #include <regex.h>
    int main() {
      regex_t  re;
      return regcomp( &re, "^.*$", REG_EXTENDED|REG_ICASE|REG_NEWLINE ); }],[ag_cv_posix_regcomp=yes],[ag_cv_posix_regcomp=no],[ag_cv_posix_regcomp=no]
               ) # end of TRY_RUN]) # end of CACHE_VAL

     AC_MSG_RESULT([$ag_cv_posix_regcomp])
     if test x$ag_cv_posix_regcomp = xyes
     then
       AC_DEFINE(HAVE_POSIX_REGCOMP, 1,
          [Define this if POSIX compliant regcomp()/regexec()])
     fi
     ]) # end of AC_DEFUN