-#serial 4
+#serial 27
+
+# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005 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_DEFUN(jm_WITH_REGEX,
- [
- AC_REQUIRE([AM_GLIBC])
-
- dnl Even packages that don't use regex.c can use this macro.
- dnl Of course, for them it doesn't do anything.
-
- # By default, don't use the included regex.c on systems with a version
- # of glibc 2 that's new enough to pass the following run test.
- # If cross compiling, assume the test would fail and use the included
- # regex.c. The failing regular expression is from `Spencer ere test
- # #75' in grep-2.2f.
- ac_use_included_regex=yes
-
- if test "$ac_cv_glibc" = yes; then
- # Without this run-test, on older glibc2 systems we'd end up
- # using the buggy system regex.
- AC_CACHE_CHECK([for working re_compile_pattern],
- jm_cv_func_working_re_compile_pattern,
- AC_TRY_RUN(
- changequote(<<, >>)dnl
- <<
-#include <stdio.h>
-#include <regex.h>
- int
- main ()
- {
- static struct re_pattern_buffer regex;
- const char *s;
- re_set_syntax (RE_SYNTAX_POSIX_EGREP);
- /* Add this third left square bracket, [, to balance the
- three right ones below. Otherwise autoconf-2.14 chokes. */
- s = re_compile_pattern ("a[[:]:]]b\n", 9, ®ex);
- /* This should fail with _Invalid character class name_ error. */
- exit (s ? 0 : 1);
- }
- >>,
- changequote([, ])dnl
-
- jm_cv_func_working_re_compile_pattern=yes,
- jm_cv_func_working_re_compile_pattern=no,
- dnl When crosscompiling, assume it's broken.
- jm_cv_func_working_re_compile_pattern=no))
- if test $jm_cv_func_working_re_compile_pattern = yes; then
- ac_use_included_regex=no
- fi
- fi
-
- test -n "$1" || AC_MSG_ERROR([missing argument])
- syscmd([test -f $1])
- ifelse(sysval, 0,
- [
-
- AC_ARG_WITH(included-regex,
- [ --without-included-regex don't compile regex; this is the default on
- systems with version 2 of the GNU C library
- (use with caution on other system)],
- jm_with_regex=$withval,
- jm_with_regex=$ac_use_included_regex)
- if test "$jm_with_regex" = yes; then
- LIBOBJS="$LIBOBJS regex.o"
- fi
- ],
- )
- ]
-)
+AC_DEFUN([gl_REGEX],
+[
+ AC_LIBSOURCES(
+ [regcomp.c, regex.c, regex.h,
+ regex_internal.c, regex_internal.h, regexec.c])
+
+ dnl Even packages that don't use regex.c can use this macro.
+ dnl Of course, for them it doesn't do anything.
+
+ # Assume we'll default to using the included regex.c.
+ ac_use_included_regex=yes
+
+ # However, if the system regex support is good enough that it passes the
+ # 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_working_re_compile_pattern],
+ [AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM(
+ [AC_INCLUDES_DEFAULT
+ #include <regex.h>],
+ [[static struct re_pattern_buffer regex;
+ const char *s;
+ struct re_registers regs;
+ /* Use the POSIX-compliant spelling with leading REG_,
+ rather than the traditional GNU spelling with leading RE_,
+ so that we reject older libc implementations. */
+ re_set_syntax (REG_SYNTAX_POSIX_EGREP);
+ memset (®ex, 0, sizeof (regex));
+ s = re_compile_pattern ("a[:@:>@:]b\n", 9, ®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 REG_IGNORE_CASE (which was then called RE_ICASE).
+ Detect that problem too. */
+ memset (®ex, 0, sizeof (regex));
+ re_set_syntax (REG_SYNTAX_EMACS | REG_IGNORE_CASE);
+ 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);
+
+ exit (0);]])],
+ [gl_cv_func_working_re_compile_pattern=yes],
+ [gl_cv_func_working_re_compile_pattern=no],
+ dnl When crosscompiling, assume it is broken.
+ [gl_cv_func_working_re_compile_pattern=no])])
+ if test $gl_cv_func_working_re_compile_pattern = yes; then
+ ac_use_included_regex=no
+ fi
+
+ AC_ARG_WITH([included-regex],
+ [ --without-included-regex don't compile regex; this is the default on
+ systems with recent-enough versions of the GNU C
+ Library (use with caution on other systems)],
+ [gl_with_regex=$withval],
+ [gl_with_regex=$ac_use_included_regex])
+ if test "X$gl_with_regex" = Xyes; then
+ 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([gl_C_RESTRICT])
+ AC_REQUIRE([AM_LANGINFO_CODESET])
+ AC_CHECK_HEADERS_ONCE([locale.h wchar.h wctype.h])
+ AC_CHECK_FUNCS_ONCE([isblank mbrtowc mempcpy wcrtomb wcscoll])
+])
projects / gnulib.git / blobdiff