Update Gnulib to the latest git version

[deliverable/binutils-gdb.git] / gnulib / import / m4 / strstr.m4

diff --git a/gnulib/import/m4/strstr.m4 b/gnulib/import/m4/strstr.m4
index bfe4c8590d95a5d9b1edc066f2c87aaac138ac20..23635143c117705ae89fb54165521d7c6359c0e3 100644 (file)
--- a/gnulib/import/m4/strstr.m4
+++ b/gnulib/import/m4/strstr.m4
@@ -1,5 +1,5 @@
-# strstr.m4 serial 17
-dnl Copyright (C) 2008-2016 Free Software Foundation, Inc.
+# strstr.m4 serial 21
+dnl Copyright (C) 2008-2019 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.
@@ -9,28 +9,37 @@ AC_DEFUN([gl_FUNC_STRSTR_SIMPLE],
 [
   AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
   AC_REQUIRE([gl_FUNC_MEMCHR])
-  if test "$gl_cv_func_memchr_works" != yes; then
+  if test $HAVE_MEMCHR = 0 || test $REPLACE_MEMCHR = 1; then
     REPLACE_STRSTR=1
   else
-    dnl Detect http://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([[
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM([[
 #include <string.h> /* for 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],
+            [
 #ifdef __GNU_LIBRARY__
  #include <features.h>
  #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
@@ -45,10 +54,10 @@ 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 "$gl_cv_func_strstr_works_always" in
       *yes) ;;
@@ -99,6 +108,9 @@ static void quit (int sig) { _exit (sig + 128); }
         if (!strstr (haystack, needle))
           result |= 1;
       }
+    /* Free allocated memory, in case some sanitizer is watching.  */
+    free (haystack);
+    free (needle);
     return result;
     ]])],
         [gl_cv_func_strstr_linear=yes], [gl_cv_func_strstr_linear=no],
@@ -123,7 +135,7 @@ static void quit (int sig) { _exit (sig + 128); }
 #endif
            ],
            [gl_cv_func_strstr_linear="guessing yes"],
-           [gl_cv_func_strstr_linear="guessing no"])
+           [gl_cv_func_strstr_linear="$gl_cross_guess_normal"])
         ])
       ])
     case "$gl_cv_func_strstr_linear" in