Merge GDB 7.5.1

libiberty/aclocal.m4

 sinclude(../config/acx.m4)
 sinclude(../config/no-executables.m4)
 sinclude(../config/override.m4)
 sinclude(../config/picflag.m4)
 sinclude(../config/warnings.m4)
 
 dnl See whether strncmp reads past the end of its string parameters.
 dnl On some versions of SunOS4 at least, strncmp reads a word at a time
 dnl but erroneously reads past the end of strings.  This can cause
 dnl a SEGV in some cases.
@@ skipping 54 matching lines @@
       char *r = (char *) p + 0xe;
 
       strcpy (q, string);
       strcpy (r, string);
       strncmp (r, q, 14);
     }
 #endif /* HAVE_MMAP || HAVE_MMAP_ANYWHERE */
   exit (0);
 }
 ], ac_cv_func_strncmp_works=yes, ac_cv_func_strncmp_works=no,
-  ac_cv_func_strncmp_works=no)
+  ac_cv_func_strncmp_works=yes)
 rm -f core core.* *.core])
 if test $ac_cv_func_strncmp_works = no ; then
   AC_LIBOBJ([strncmp])
 fi
 ])
 
 dnl See if errno must be declared even when <errno.h> is included.
 AC_DEFUN(libiberty_AC_DECLARE_ERRNO,
 [AC_CACHE_CHECK(whether errno must be declared, libiberty_cv_declare_errno,
 [AC_TRY_COMPILE(
@@ skipping 80 matching lines @@
   ac_cv_c_stack_direction=1,
   ac_cv_c_stack_direction=-1,
   ac_cv_c_stack_direction=0)])
 AC_DEFINE_UNQUOTED(STACK_DIRECTION, $ac_cv_c_stack_direction,
   [Define if you know the direction of stack growth for your system;
    otherwise it will be automatically deduced at run-time.
         STACK_DIRECTION > 0 => grows toward higher addresses
         STACK_DIRECTION < 0 => grows toward lower addresses
         STACK_DIRECTION = 0 => direction of growth unknown])
 ])