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Diffstat (limited to 'gnulib-m4/strstr.m4')
-rw-r--r--gnulib-m4/strstr.m456
1 files changed, 33 insertions, 23 deletions
diff --git a/gnulib-m4/strstr.m4 b/gnulib-m4/strstr.m4
index aa590a9..6cc2072 100644
--- a/gnulib-m4/strstr.m4
+++ b/gnulib-m4/strstr.m4
@@ -1,5 +1,5 @@
-# strstr.m4 serial 19
-dnl Copyright (C) 2008-2018 Free Software Foundation, Inc.
+# strstr.m4 serial 24
+dnl Copyright (C) 2008-2022 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
@@ -7,30 +7,40 @@ dnl with or without modifications, as long as this notice is preserved.
dnl Check that strstr works.
AC_DEFUN([gl_FUNC_STRSTR_SIMPLE],
[
- AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+ AC_REQUIRE([gl_STRING_H_DEFAULTS])
AC_REQUIRE([gl_FUNC_MEMCHR])
- if test $HAVE_MEMCHR = 0 || test $REPLACE_MEMCHR = 1; then
+ if test $REPLACE_MEMCHR = 1; then
REPLACE_STRSTR=1
else
- dnl Detect https://sourceware.org/bugzilla/show_bug.cgi?id=12092.
+ dnl Detect https://sourceware.org/bugzilla/show_bug.cgi?id=12092
+ dnl and https://sourceware.org/bugzilla/show_bug.cgi?id=23637.
AC_CACHE_CHECK([whether strstr works],
[gl_cv_func_strstr_works_always],
- [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
-#include <string.h> /* for strstr */
+ [AC_RUN_IFELSE(
+ [AC_LANG_PROGRAM([[
+#include <string.h> /* for __GNU_LIBRARY__, strstr */
+#ifdef __GNU_LIBRARY__
+ #include <features.h>
+ #if __GLIBC__ == 2 && __GLIBC_MINOR__ == 28
+ Unlucky user
+ #endif
+#endif
#define P "_EF_BF_BD"
#define HAYSTACK "F_BD_CE_BD" P P P P "_C3_88_20" P P P "_C3_A7_20" P
#define NEEDLE P P P P P
-]], [[return !!strstr (HAYSTACK, NEEDLE);
- ]])],
- [gl_cv_func_strstr_works_always=yes],
- [gl_cv_func_strstr_works_always=no],
- [dnl glibc 2.12 and cygwin 1.7.7 have a known bug. uClibc is not
- dnl affected, since it uses different source code for strstr than
- dnl glibc.
- dnl Assume that it works on all other platforms, even if it is not
- dnl linear.
- AC_EGREP_CPP([Lucky user],
- [
+]],
+ [[return !!strstr (HAYSTACK, NEEDLE);
+ ]])],
+ [gl_cv_func_strstr_works_always=yes],
+ [gl_cv_func_strstr_works_always=no],
+ [dnl glibc 2.12 and cygwin 1.7.7 have a known bug. uClibc is not
+ dnl affected, since it uses different source code for strstr than
+ dnl glibc.
+ dnl Assume that it works on all other platforms, even if it is not
+ dnl linear.
+ AC_EGREP_CPP([Lucky user],
+ [
+#include <string.h> /* for __GNU_LIBRARY__ */
#ifdef __GNU_LIBRARY__
#include <features.h>
#if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
@@ -45,10 +55,10 @@ AC_DEFUN([gl_FUNC_STRSTR_SIMPLE],
#else
Lucky user
#endif
- ],
- [gl_cv_func_strstr_works_always="guessing yes"],
- [gl_cv_func_strstr_works_always="guessing no"])
- ])
+ ],
+ [gl_cv_func_strstr_works_always="guessing yes"],
+ [gl_cv_func_strstr_works_always="$gl_cross_guess_normal"])
+ ])
])
case "$gl_cv_func_strstr_works_always" in
*yes) ;;
@@ -126,7 +136,7 @@ static void quit (int sig) { _exit (sig + 128); }
#endif
],
[gl_cv_func_strstr_linear="guessing yes"],
- [gl_cv_func_strstr_linear="guessing no"])
+ [gl_cv_func_strstr_linear="$gl_cross_guess_normal"])
])
])
case "$gl_cv_func_strstr_linear" in