Mercurial > gnulib
view m4/wmemmove.m4 @ 40215:88b18d82fa61
crypto/des: Fix undefined behaviour.
* lib/des.c (READ_64BIT_DATA): Cast bytes to 'unsigned int', to avoid
shift operations on 'int'.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 09 Mar 2019 22:21:25 +0100 |
parents | b06060465f09 |
children |
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# wmemmove.m4 serial 3 dnl Copyright (C) 2011-2019 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. AC_DEFUN([gl_FUNC_WMEMMOVE], [ AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) dnl We cannot use AC_CHECK_FUNCS here, because the MSVC 9 header files dnl provide this function as an inline function definition. AC_CACHE_CHECK([for wmemmove], [gl_cv_func_wmemmove], [AC_COMPILE_IFELSE( [AC_LANG_PROGRAM([[ /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before <wchar.h>. BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be included before <wchar.h>. */ #include <stddef.h> #include <stdio.h> #include <time.h> #include <wchar.h> ]], [[return ! wmemmove ((wchar_t *) 0, (const wchar_t *) 0, 0);]]) ], [gl_cv_func_wmemmove=yes], [gl_cv_func_wmemmove=no]) ]) if test $gl_cv_func_wmemmove = no; then HAVE_WMEMMOVE=0 fi ])