Improve cross-compilation guesses for uClibc.

* m4/memmem.m4 (gl_FUNC_MEMMEM_SIMPLE): When cross-compiling, assume
that uClibc does not have the glibc bug.
* m4/strcasestr.m4 (gl_FUNC_STRCASESTR_SIMPLE): Likewise.
* m4/strstr.m4 (gl_FUNC_STRSTR_SIMPLE): Likewise.

diff --git a/ChangeLog b/ChangeLog
index 1ec24da..5a65773 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,12 @@
+2010-12-15  Pádraig Brady <P@draigBrady.com>
+            Bruno Haible  <bruno@clisp.org>
+
+       Improve cross-compilation guesses for uClibc.
+       * m4/memmem.m4 (gl_FUNC_MEMMEM_SIMPLE): When cross-compiling, assume
+       that uClibc does not have the glibc bug.
+       * m4/strcasestr.m4 (gl_FUNC_STRCASESTR_SIMPLE): Likewise.
+       * m4/strstr.m4 (gl_FUNC_STRSTR_SIMPLE): Likewise.
+
 2010-12-14  Eric Blake  <eblake@redhat.com>
 
        configmake: provide fallbacks for oldest supported autotools

diff --git a/m4/memmem.m4 b/m4/memmem.m4
index 7df132e..e3bb83b 100644 (file)
--- a/m4/memmem.m4
+++ b/m4/memmem.m4
@@ -1,4 +1,4 @@
-# memmem.m4 serial 20
+# memmem.m4 serial 21
 dnl Copyright (C) 2002, 2003, 2004, 2007, 2008, 2009, 2010 Free Software
 dnl Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
@@ -29,14 +29,17 @@ AC_DEFUN([gl_FUNC_MEMMEM_SIMPLE],
     ]])],
         [gl_cv_func_memmem_works_always=yes],
         [gl_cv_func_memmem_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 memmem 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)) \
-     && !defined __UCLIBC__
+     || defined __UCLIBC__
   Lucky user
  #endif
 #elif defined __CYGWIN__

diff --git a/m4/strcasestr.m4 b/m4/strcasestr.m4
index 5c4cef4..b7ae301 100644 (file)
--- a/m4/strcasestr.m4
+++ b/m4/strcasestr.m4
@@ -1,4 +1,4 @@
-# strcasestr.m4 serial 18
+# strcasestr.m4 serial 19
 dnl Copyright (C) 2005, 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -32,14 +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)) \
-     && !defined __UCLIBC__
+     || defined __UCLIBC__
   Lucky user
  #endif
 #elif defined __CYGWIN__

diff --git a/m4/strstr.m4 b/m4/strstr.m4
index d83503e..2b46c3d 100644 (file)
--- a/m4/strstr.m4
+++ b/m4/strstr.m4
@@ -1,4 +1,4 @@
-# strstr.m4 serial 12
+# strstr.m4 serial 13
 dnl Copyright (C) 2008, 2009, 2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -25,14 +25,17 @@ AC_DEFUN([gl_FUNC_STRSTR_SIMPLE],
     ]])],
         [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.  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 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)) \
-     && !defined __UCLIBC__
+     || defined __UCLIBC__
   Lucky user
  #endif
 #elif defined __CYGWIN__