X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstrcasestr.m4;h=09692a790b670545c10863f789e5a59d8bbd191d;hb=cd19e83484e2c0ff9fd68e7439dd97128c6a2703;hp=d17105e6c771b03d3b5a66791ddbe00f3f47a9ea;hpb=cfc53c2c376af565f1589086d173f45ecedf8cd0;p=gnulib.git

diff --git a/m4/strcasestr.m4 b/m4/strcasestr.m4
index d17105e6c..09692a790 100644
--- a/m4/strcasestr.m4
+++ b/m4/strcasestr.m4
@@ -1,5 +1,5 @@
-# strcasestr.m4 serial 16
-dnl Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
+# strcasestr.m4 serial 20
+dnl Copyright (C) 2005, 2007-2011 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.
@@ -32,13 +32,17 @@ AC_DEFUN([gl_FUNC_STRCASESTR_SIMPLE],
       ]])],
           [gl_cv_func_strcasestr_works_always=yes],
           [gl_cv_func_strcasestr_works_always=no],
-          [dnl glibc 2.12 and cygwin 1.7.7 have a known bug.  Assume that it
-           dnl works on all other platforms, even if it is not linear.
+          [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 strcasestr
+           dnl than 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)
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+     || defined __UCLIBC__
   Lucky user
  #endif
 #elif defined __CYGWIN__
@@ -56,14 +60,9 @@ AC_DEFUN([gl_FUNC_STRCASESTR_SIMPLE],
         ])
       if test "$gl_cv_func_strcasestr_works_always" != yes; then
         REPLACE_STRCASESTR=1
-        AC_LIBOBJ([strcasestr])
       fi
     fi
   fi
-  if test $HAVE_STRCASESTR = 0 || test $REPLACE_STRCASESTR = 1; then
-    AC_LIBOBJ([strcasestr])
-    gl_PREREQ_STRCASESTR
-  fi
 ]) # gl_FUNC_STRCASESTR_SIMPLE
 
 dnl Additionally, check that strcasestr is efficient.
@@ -79,10 +78,11 @@ AC_DEFUN([gl_FUNC_STRCASESTR],
 #include <stdlib.h> /* for malloc */
 #include <unistd.h> /* for alarm */
 static void quit (int sig) { exit (sig + 128); }
-]], [[size_t m = 1000000;
+]], [[
+    int result = 0;
+    size_t m = 1000000;
     char *haystack = (char *) malloc (2 * m + 2);
     char *needle = (char *) malloc (m + 2);
-    void *result = 0;
     /* Failure to compile this test due to missing alarm is okay,
        since all such platforms (mingw) also lack strcasestr.  */
     signal (SIGALRM, quit);
@@ -96,9 +96,11 @@ static void quit (int sig) { exit (sig + 128); }
         memset (needle, 'A', m);
         needle[m] = 'B';
         needle[m + 1] = 0;
-        result = strcasestr (haystack, needle);
+        if (!strcasestr (haystack, needle))
+          result |= 1;
       }
-    return !result;]])],
+    return result;
+    ]])],
         [gl_cv_func_strcasestr_linear=yes], [gl_cv_func_strcasestr_linear=no],
         [dnl Only glibc > 2.12 and cygwin > 1.7.7 are known to have a
          dnl strcasestr that works in linear time.
@@ -106,7 +108,8 @@ static void quit (int sig) { exit (sig + 128); }
            [
 #include <features.h>
 #ifdef __GNU_LIBRARY__
- #if (__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)
+ #if ((__GLIBC__ == 2 && __GLIBC_MINOR__ > 12) || (__GLIBC__ > 2)) \
+     && !defined __UCLIBC__
   Lucky user
  #endif
 #endif
@@ -123,8 +126,6 @@ static void quit (int sig) { exit (sig + 128); }
       ])
     if test "$gl_cv_func_strcasestr_linear" != yes; then
       REPLACE_STRCASESTR=1
-      AC_LIBOBJ([strcasestr])
-      gl_PREREQ_STRCASESTR
     fi
   fi
 ]) # gl_FUNC_STRCASESTR