188 lines
6.7 KiB
Plaintext
188 lines
6.7 KiB
Plaintext
#serial 31
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# Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005 Free
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# Software Foundation, Inc.
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#
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# This file is free software; the Free Software Foundation
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# gives unlimited permission to copy and/or distribute it,
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# with or without modifications, as long as this notice is preserved.
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dnl Initially derived from code in GNU grep.
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dnl Mostly written by Jim Meyering.
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AC_PREREQ([2.50])
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AC_DEFUN([gl_REGEX],
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[
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AC_REQUIRE([AC_SYS_LARGEFILE]) dnl for a sufficently-wide off_t
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AC_CACHE_CHECK([whether off_t can be used in a switch statement],
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[gl_cv_type_off_t_switch],
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[AC_COMPILE_IFELSE(
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[AC_LANG_PROGRAM(
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[AC_INCLUDES_DEFAULT],
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[[off_t o = -1;
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switch (o)
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{
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case -2:
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return 1;
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case -1:
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return 2;
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default:
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return 0;
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}
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]])],
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[gl_cv_type_off_t_switch=yes],
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[gl_cv_type_off_t_switch=no])])
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if test $gl_cv_type_off_t_switch = yes; then
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AC_DEFINE([_REGEX_LARGE_OFFSETS], 1,
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[Define if you want regoff_t to be at least as wide POSIX requires.])
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fi
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AC_LIBSOURCES(
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[regcomp.c, regex.c, regex.h,
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regex_internal.c, regex_internal.h, regexec.c])
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AC_ARG_WITH([included-regex],
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[AC_HELP_STRING([--without-included-regex],
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[don't compile regex; this is the default on
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systems with recent-enough versions of the GNU C
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Library (use with caution on other systems)])])
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case $with_included_regex in
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yes|no) ac_use_included_regex=$with_included_regex
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;;
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'')
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# If the system regex support is good enough that it passes the the
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# following run test, then default to *not* using the included regex.c.
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# If cross compiling, assume the test would fail and use the included
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# regex.c. The first failing regular expression is from `Spencer ere
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# test #75' in grep-2.3.
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AC_CACHE_CHECK([for working re_compile_pattern],
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[gl_cv_func_re_compile_pattern_broken],
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[AC_RUN_IFELSE(
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[AC_LANG_PROGRAM(
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[AC_INCLUDES_DEFAULT
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#include <regex.h>],
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[[static struct re_pattern_buffer regex;
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const char *s;
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struct re_registers regs;
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/* Use the POSIX-compliant spelling with leading REG_,
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rather than the traditional GNU spelling with leading RE_,
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so that we reject older libc implementations. */
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re_set_syntax (REG_SYNTAX_POSIX_EGREP);
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memset (®ex, 0, sizeof (regex));
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s = re_compile_pattern ("a[:@:>@:]b\n", 9, ®ex);
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/* This should fail with _Invalid character class name_ error. */
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if (!s)
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exit (1);
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/* This should succeed, but does not for e.g. glibc-2.1.3. */
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memset (®ex, 0, sizeof (regex));
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s = re_compile_pattern ("{1", 2, ®ex);
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if (s)
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exit (1);
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/* The following example is derived from a problem report
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against gawk from Jorge Stolfi <stolfi@ic.unicamp.br>. */
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memset (®ex, 0, sizeof (regex));
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s = re_compile_pattern ("[an\371]*n", 7, ®ex);
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if (s)
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exit (1);
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/* This should match, but does not for e.g. glibc-2.2.1. */
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if (re_match (®ex, "an", 2, 0, ®s) != 2)
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exit (1);
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memset (®ex, 0, sizeof (regex));
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s = re_compile_pattern ("x", 1, ®ex);
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if (s)
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exit (1);
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/* The version of regex.c in e.g. GNU libc-2.2.93 did not
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work with a negative RANGE argument. */
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if (re_search (®ex, "wxy", 3, 2, -2, ®s) != 1)
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exit (1);
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/* The version of regex.c in older versions of gnulib
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ignored REG_IGNORE_CASE (which was then called RE_ICASE).
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Detect that problem too. */
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memset (®ex, 0, sizeof (regex));
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re_set_syntax (REG_SYNTAX_EMACS | REG_IGNORE_CASE);
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s = re_compile_pattern ("x", 1, ®ex);
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if (s)
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exit (1);
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if (re_search (®ex, "WXY", 3, 0, 3, ®s) < 0)
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exit (1);
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/* REG_STARTEND was added to glibc on 2004-01-15.
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Reject older versions. */
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if (! REG_STARTEND)
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exit (1);
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/* Reject hosts whose regoff_t values are too narrow.
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These include glibc 2.3.5 on hosts with 64-bit off_t
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and 32-bit int, and Solaris 10 on hosts with 32-bit int
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and _FILE_OFFSET_BITS=64. */
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if (sizeof (regoff_t) < sizeof (off_t))
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exit (1);
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exit (0);]])],
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[gl_cv_func_re_compile_pattern_broken=no],
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[gl_cv_func_re_compile_pattern_broken=yes],
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dnl When crosscompiling, assume it is broken.
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[gl_cv_func_re_compile_pattern_broken=yes])])
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ac_use_included_regex=$gl_cv_func_re_compile_pattern_broken
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;;
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*) AC_MSG_ERROR([Invalid value for --with-included-regex: $with_included_regex])
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;;
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esac
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if test $ac_use_included_regex = yes; then
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AC_DEFINE([re_syntax_options], [rpl_re_syntax_options],
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[Define to rpl_re_syntax_options if the replacement should be used.])
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AC_DEFINE([re_set_syntax], [rpl_re_set_syntax],
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[Define to rpl_re_set_syntax if the replacement should be used.])
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AC_DEFINE([re_compile_pattern], [rpl_re_compile_pattern],
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[Define to rpl_re_compile_pattern if the replacement should be used.])
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AC_DEFINE([re_compile_fastmap], [rpl_re_compile_fastmap],
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[Define to rpl_re_compile_fastmap if the replacement should be used.])
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AC_DEFINE([re_search], [rpl_re_search],
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[Define to rpl_re_search if the replacement should be used.])
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AC_DEFINE([re_search_2], [rpl_re_search_2],
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[Define to rpl_re_search_2 if the replacement should be used.])
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AC_DEFINE([re_match], [rpl_re_match],
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[Define to rpl_re_match if the replacement should be used.])
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AC_DEFINE([re_match_2], [rpl_re_match_2],
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[Define to rpl_re_match_2 if the replacement should be used.])
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AC_DEFINE([re_set_registers], [rpl_re_set_registers],
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[Define to rpl_re_set_registers if the replacement should be used.])
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AC_DEFINE([re_comp], [rpl_re_comp],
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[Define to rpl_re_comp if the replacement should be used.])
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AC_DEFINE([re_exec], [rpl_re_exec],
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[Define to rpl_re_exec if the replacement should be used.])
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AC_DEFINE([regcomp], [rpl_regcomp],
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[Define to rpl_regcomp if the replacement should be used.])
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AC_DEFINE([regexec], [rpl_regexec],
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[Define to rpl_regexec if the replacement should be used.])
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AC_DEFINE([regerror], [rpl_regerror],
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[Define to rpl_regerror if the replacement should be used.])
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AC_DEFINE([regfree], [rpl_regfree],
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[Define to rpl_regfree if the replacement should be used.])
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AC_LIBOBJ([regex])
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gl_PREREQ_REGEX
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fi
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])
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# Prerequisites of lib/regex.c and lib/regex_internal.c.
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AC_DEFUN([gl_PREREQ_REGEX],
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[
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AC_REQUIRE([AC_GNU_SOURCE])
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AC_REQUIRE([gl_C_RESTRICT])
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AC_REQUIRE([AM_LANGINFO_CODESET])
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AC_CHECK_HEADERS_ONCE([locale.h wchar.h wctype.h])
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AC_CHECK_FUNCS_ONCE([isblank mbrtowc mempcpy wcrtomb wcscoll])
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])
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