X-Git-Url: https://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstpncpy.m4;h=09f09f645db432e81aa76ee100281ef0df80e7fc;hb=da8054d48dc22e1c051db54049e005d51a006e69;hp=158cc087d9e6af70e004b353dc9a694199e77f6c;hpb=c5728261c324a75f8d23dd7d10cb42dde9420227;p=gnulib.git

diff --git a/m4/stpncpy.m4 b/m4/stpncpy.m4
index 158cc087d..09f09f645 100644
--- a/m4/stpncpy.m4
+++ b/m4/stpncpy.m4
@@ -1,5 +1,5 @@
-# stpncpy.m4 serial 12
-dnl Copyright (C) 2002-2003, 2005-2007, 2009-2010 Free Software Foundation,
+# stpncpy.m4 serial 16
+dnl Copyright (C) 2002-2003, 2005-2007, 2009-2013 Free Software Foundation,
 dnl Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -29,48 +29,65 @@ AC_DEFUN([gl_FUNC_STPNCPY],
   AC_CHECK_FUNCS_ONCE([stpncpy])
   if test $ac_cv_func_stpncpy = yes; then
     AC_CACHE_CHECK([for working stpncpy], [gl_cv_func_stpncpy], [
-      AC_TRY_RUN([
+      AC_RUN_IFELSE(
+        [AC_LANG_SOURCE([[
 #include <stdlib.h>
 #include <string.h> /* for strcpy */
 /* The stpncpy prototype is missing in <string.h> on AIX 4.  */
 #if !HAVE_DECL_STPNCPY
-extern char *stpncpy (char *dest, const char *src, size_t n);
+extern
+# ifdef __cplusplus
+"C"
+# endif
+char *stpncpy (char *dest, const char *src, size_t n);
 #endif
-int main () {
+int main ()
+{
+  int result = 0;
   const char *src = "Hello";
   char dest[10];
   /* AIX 4.3.3 and AIX 5.1 stpncpy() returns dest+1 here.  */
-  strcpy (dest, "\377\377\377\377\377\377");
-  if (stpncpy (dest, src, 2) != dest + 2) exit(1);
+  {
+    strcpy (dest, "\377\377\377\377\377\377");
+    if (stpncpy (dest, src, 2) != dest + 2)
+      result |= 1;
+  }
   /* AIX 4.3.3 and AIX 5.1 stpncpy() returns dest+4 here.  */
-  strcpy (dest, "\377\377\377\377\377\377");
-  if (stpncpy (dest, src, 5) != dest + 5) exit(1);
+  {
+    strcpy (dest, "\377\377\377\377\377\377");
+    if (stpncpy (dest, src, 5) != dest + 5)
+      result |= 2;
+  }
   /* AIX 4.3.3 and AIX 5.1 stpncpy() returns dest+6 here.  */
-  strcpy (dest, "\377\377\377\377\377\377");
-  if (stpncpy (dest, src, 7) != dest + 5) exit(1);
-  exit(0);
+  {
+    strcpy (dest, "\377\377\377\377\377\377");
+    if (stpncpy (dest, src, 7) != dest + 5)
+      result |= 4;
+  }
+  return result;
 }
-], [gl_cv_func_stpncpy=yes], [gl_cv_func_stpncpy=no],
+]])],
+        [gl_cv_func_stpncpy=yes],
+        [gl_cv_func_stpncpy=no],
         [AC_EGREP_CPP([Thanks for using GNU], [
 #include <features.h>
 #ifdef __GNU_LIBRARY__
   Thanks for using GNU
 #endif
-], [gl_cv_func_stpncpy=yes], [gl_cv_func_stpncpy=no])
+], [gl_cv_func_stpncpy="guessing yes"], [gl_cv_func_stpncpy="guessing no"])
         ])
     ])
-    if test $gl_cv_func_stpncpy = yes; then
-      AC_DEFINE([HAVE_STPNCPY], [1],
-        [Define if you have the stpncpy() function and it works.])
-    else
-      REPLACE_STPNCPY=1
-      AC_LIBOBJ([stpncpy])
-      gl_PREREQ_STPNCPY
-    fi
+    case "$gl_cv_func_stpncpy" in
+      *yes)
+        AC_DEFINE([HAVE_STPNCPY], [1],
+          [Define if you have the stpncpy() function and it works.])
+        ;;
+      *)
+        REPLACE_STPNCPY=1
+        ;;
+    esac
   else
     HAVE_STPNCPY=0
-    AC_LIBOBJ([stpncpy])
-    gl_PREREQ_STPNCPY
   fi
 ])