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#serial 38
# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005,
# 2006 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.
dnl Initially derived from code in GNU grep.
dnl Mostly written by Jim Meyering.
AC_PREREQ([2.50])
AC_DEFUN([gl_REGEX],
[
AC_LIBSOURCES(
[regcomp.c, regex.c, regex.h,
regex_internal.c, regex_internal.h, regexec.c])
AC_ARG_WITH([included-regex],
[AC_HELP_STRING([--without-included-regex],
[don't compile regex; this is the default on
systems with recent-enough versions of the GNU C
Library (use with caution on other systems)])])
case $with_included_regex in #(
yes|no) ac_use_included_regex=$with_included_regex
;;
'')
# If the system regex support is good enough that it passes the
# following run test, then default to *not* using the included regex.c.
# If cross compiling, assume the test would fail and use the included
# regex.c. The first failing regular expression is from `Spencer ere
# test #75' in grep-2.3.
AC_CACHE_CHECK([for working re_compile_pattern],
[gl_cv_func_re_compile_pattern_working],
[AC_RUN_IFELSE(
[AC_LANG_PROGRAM(
[AC_INCLUDES_DEFAULT
#include <limits.h>
#include <regex.h>
],
[[static struct re_pattern_buffer regex;
unsigned char folded_chars[UCHAR_MAX + 1];
int i;
const char *s;
struct re_registers regs;
re_set_syntax (RE_SYNTAX_POSIX_EGREP);
memset (®ex, 0, sizeof (regex));
for (i = 0; i <= UCHAR_MAX; i++)
folded_chars[i] = i;
regex.translate = folded_chars;
s = re_compile_pattern ("a[[:@:>@:]]b\n", 11, ®ex);
/* This should fail with _Invalid character class name_ error. */
if (!s)
exit (1);
/* This should succeed, but does not for e.g. glibc-2.1.3. */
memset (®ex, 0, sizeof (regex));
s = re_compile_pattern ("{1", 2, ®ex);
if (s)
exit (1);
/* The following example is derived from a problem report
against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */
memset (®ex, 0, sizeof (regex));
s = re_compile_pattern ("[an\371]*n", 7, ®ex);
if (s)
exit (1);
/* This should match, but does not for e.g. glibc-2.2.1. */
if (re_match (®ex, "an", 2, 0, ®s) != 2)
exit (1);
memset (®ex, 0, sizeof (regex));
s = re_compile_pattern ("x", 1, ®ex);
if (s)
exit (1);
/* The version of regex.c in e.g. GNU libc-2.2.93 did not
work with a negative RANGE argument. */
if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1)
exit (1);
/* The version of regex.c in older versions of gnulib
ignored RE_ICASE. Detect that problem too. */
memset (®ex, 0, sizeof (regex));
re_set_syntax (RE_SYNTAX_EMACS | RE_ICASE);
s = re_compile_pattern ("x", 1, ®ex);
if (s)
exit (1);
if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0)
exit (1);
/* REG_STARTEND was added to glibc on 2004-01-15.
Reject older versions. */
if (! REG_STARTEND)
exit (1);
/* Reject hosts whose regoff_t values are too narrow.
These include glibc 2.3.5 on hosts with 64-bit ptrdiff_t
and 32-bit int. */
if (sizeof (regoff_t) < sizeof (ptrdiff_t)
|| sizeof (regoff_t) < sizeof (ssize_t))
exit (1);
exit (0);]])],
[gl_cv_func_re_compile_pattern_working=yes],
[gl_cv_func_re_compile_pattern_working=no],
dnl When crosscompiling, assume it is not working.
[gl_cv_func_re_compile_pattern_working=no])])
case $gl_cv_func_re_compile_pattern_working in #(
yes) ac_use_included_regex=no;; #(
no) ac_use_included_regex=yes;;
esac
;;
*) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
;;
esac
if test $ac_use_included_regex = yes; then
AC_DEFINE([_REGEX_LARGE_OFFSETS], 1,
[Define if you want regoff_t to be at least as wide POSIX requires.])
AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
[Define to rpl_re_syntax_options if the replacement should be used.])
AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
[Define to rpl_re_set_syntax if the replacement should be used.])
AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
[Define to rpl_re_compile_pattern if the replacement should be used.])
AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
[Define to rpl_re_compile_fastmap if the replacement should be used.])
AC_DEFINE([re_search], [rpl_re_search],
[Define to rpl_re_search if the replacement should be used.])
AC_DEFINE([re_search_2], [rpl_re_search_2],
[Define to rpl_re_search_2 if the replacement should be used.])
AC_DEFINE([re_match], [rpl_re_match],
[Define to rpl_re_match if the replacement should be used.])
AC_DEFINE([re_match_2], [rpl_re_match_2],
[Define to rpl_re_match_2 if the replacement should be used.])
AC_DEFINE([re_set_registers], [rpl_re_set_registers],
[Define to rpl_re_set_registers if the replacement should be used.])
AC_DEFINE([re_comp], [rpl_re_comp],
[Define to rpl_re_comp if the replacement should be used.])
AC_DEFINE([re_exec], [rpl_re_exec],
[Define to rpl_re_exec if the replacement should be used.])
AC_DEFINE([regcomp], [rpl_regcomp],
[Define to rpl_regcomp if the replacement should be used.])
AC_DEFINE([regexec], [rpl_regexec],
[Define to rpl_regexec if the replacement should be used.])
AC_DEFINE([regerror], [rpl_regerror],
[Define to rpl_regerror if the replacement should be used.])
AC_DEFINE([regfree], [rpl_regfree],
[Define to rpl_regfree if the replacement should be used.])
AC_LIBOBJ([regex])
gl_PREREQ_REGEX
fi
])
# Prerequisites of lib/regex.c and lib/regex_internal.c.
AC_DEFUN([gl_PREREQ_REGEX],
[
AC_REQUIRE([AC_GNU_SOURCE])
AC_REQUIRE([AC_C_RESTRICT])
AC_REQUIRE([AM_LANGINFO_CODESET])
AC_CHECK_HEADERS_ONCE([locale.h wchar.h wctype.h])
AC_CHECK_FUNCS_ONCE([mbrtowc mempcpy wcrtomb wcscoll])
AC_CHECK_DECLS([isblank], [], [], [#include <ctype.h>])
])
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