Merge GDB 7.5.1

gdb/gnulib/m4/memmem.m4

Index: gdb/gnulib/m4/memmem.m4
diff --git a/gdb/gnulib/m4/memmem.m4 b/gdb/gnulib/m4/memmem.m4
deleted file mode 100644
index c6506ee5c8138e81d47ec6a603973211250eb3be..0000000000000000000000000000000000000000
--- a/gdb/gnulib/m4/memmem.m4
+++ /dev/null
@@ -1,84 +0,0 @@
-# memmem.m4 serial 14
-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
-dnl gives unlimited permission to copy and/or distribute it,
-dnl with or without modifications, as long as this notice is preserved.
-
-dnl Check that memmem is present.
-AC_DEFUN([gl_FUNC_MEMMEM_SIMPLE],
-[
-  dnl Persuade glibc <string.h> to declare memmem().
-  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
-
-  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
-  AC_REPLACE_FUNCS([memmem])
-  AC_CHECK_DECLS_ONCE([memmem])
-  if test $ac_cv_have_decl_memmem = no; then
-    HAVE_DECL_MEMMEM=0
-  fi
-  gl_PREREQ_MEMMEM
-]) # gl_FUNC_MEMMEM_SIMPLE
-
-dnl Additionally, check that memmem is efficient and handles empty needles.
-AC_DEFUN([gl_FUNC_MEMMEM],
-[
-  AC_REQUIRE([gl_FUNC_MEMMEM_SIMPLE])
-  if test $ac_cv_have_decl_memmem = yes; then
-    AC_CACHE_CHECK([whether memmem works in linear time],
-      [gl_cv_func_memmem_works],
-      [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
-#include <signal.h> /* for signal */
-#include <string.h> /* for memmem */
-#include <stdlib.h> /* for malloc */
-#include <unistd.h> /* for alarm */
-]], [[size_t m = 1000000;
-    char *haystack = (char *) malloc (2 * m + 1);
-    char *needle = (char *) malloc (m + 1);
-    void *result = 0;
-    /* Failure to compile this test due to missing alarm is okay,
-       since all such platforms (mingw) also lack memmem.  */
-    signal (SIGALRM, SIG_DFL);
-    alarm (5);
-    /* Check for quadratic performance.  */
-    if (haystack && needle)
-      {
-        memset (haystack, 'A', 2 * m);
-        haystack[2 * m] = 'B';
-        memset (needle, 'A', m);
-        needle[m] = 'B';
-        result = memmem (haystack, 2 * m + 1, needle, m + 1);
-      }
-    /* Check for empty needle behavior.  */
-    return !result || !memmem ("a", 1, 0, 0);]])],
-        [gl_cv_func_memmem_works=yes], [gl_cv_func_memmem_works=no],
-        [dnl Only glibc >= 2.9 and cygwin >= 1.7.0 are known to have a
-         dnl memmem that works in linear time.
-         AC_EGREP_CPP([Lucky user],
-           [
-#include <features.h>
-#ifdef __GNU_LIBRARY__
- #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 9) || (__GLIBC__ > 2)
-  Lucky user
- #endif
-#endif
-#ifdef __CYGWIN__
- #include <cygwin/version.h>
- #if CYGWIN_VERSION_DLL_MAJOR >= 1007
-  Lucky user
- #endif
-#endif
-           ],
-           [gl_cv_func_memmem_works=yes],
-           [gl_cv_func_memmem_works="guessing no"])
-        ])
-      ])
-    if test "$gl_cv_func_memmem_works" != yes; then
-      REPLACE_MEMMEM=1
-      AC_LIBOBJ([memmem])
-    fi
-  fi
-]) # gl_FUNC_MEMMEM
-
-# Prerequisites of lib/memmem.c.
-AC_DEFUN([gl_PREREQ_MEMMEM], [:])