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# pcre.m4 - check for libpcre support
# Copyright (C) 2010-2021 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
AC_DEFUN([gl_FUNC_PCRE],
[
AC_ARG_ENABLE([perl-regexp],
AS_HELP_STRING([--disable-perl-regexp],
[disable perl-regexp (pcre) support]),
[case $enableval in
yes|no) test_pcre=$enableval;;
*) AC_MSG_ERROR([invalid value $enableval for --disable-perl-regexp]);;
esac],
[test_pcre=maybe])
AC_SUBST([PCRE_CFLAGS])
AC_SUBST([PCRE_LIBS])
use_pcre=no
if test $test_pcre != no; then
PKG_CHECK_MODULES([PCRE], [libpcre], [], [: ${PCRE_LIBS=-lpcre}])
AC_CACHE_CHECK([for pcre_compile], [pcre_cv_have_pcre_compile],
[pcre_saved_CFLAGS=$CFLAGS
pcre_saved_LIBS=$LIBS
CFLAGS="$CFLAGS $PCRE_CFLAGS"
LIBS="$PCRE_LIBS $LIBS"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM([[#include <pcre.h>
]],
[[pcre *p = pcre_compile (0, 0, 0, 0, 0);
return !p;]])],
[pcre_cv_have_pcre_compile=yes],
[pcre_cv_have_pcre_compile=no])
CFLAGS=$pcre_saved_CFLAGS
LIBS=$pcre_saved_LIBS])
if test "$pcre_cv_have_pcre_compile" = yes; then
use_pcre=yes
elif test $test_pcre = maybe; then
AC_MSG_WARN([AC_PACKAGE_NAME will be built without pcre support.])
else
AC_MSG_ERROR([pcre support not available])
fi
fi
if test $use_pcre = yes; then
AC_DEFINE([HAVE_LIBPCRE], [1],
[Define to 1 if you have the Perl Compatible Regular Expressions
library (-lpcre).])
else
PCRE_CFLAGS=
PCRE_LIBS=
fi
])
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