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AG_CHECK_POSIX_REGCOMP
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.
Bruce Korb <bkorb@gnu.org>
2008-04-12
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() { int flags = REG_EXTENDED|REG_ICASE|REG_NEWLINE; regex_t re; if (regcomp( &re, "^.*$", flags ) != 0) return 1; return regcomp( &re, "|no.*", flags ); }],[ag_cv_posix_regcomp=yes],[ag_cv_posix_regcomp=no],[ag_cv_posix_regcomp=no] ) # end of TRY_RUN]) # end of CACHE_VAL AC_MSG_RESULT([$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 of AG_CHECK_POSIX_REGCOMP
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