diff options
Diffstat (limited to 'gnulib-m4/strstr.m4')
| -rw-r--r-- | gnulib-m4/strstr.m4 | 56 |
1 files changed, 33 insertions, 23 deletions
diff --git a/gnulib-m4/strstr.m4 b/gnulib-m4/strstr.m4 index aa590a97..6cc20727 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 |