Mercurial > gnulib
view m4/memrchr.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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# memrchr.m4 serial 10 dnl Copyright (C) 2002-2003, 2005-2007, 2009-2019 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, dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_MEMRCHR], [ dnl Persuade glibc <string.h> to declare memrchr(). AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS]) AC_CHECK_DECLS_ONCE([memrchr]) if test $ac_cv_have_decl_memrchr = no; then HAVE_DECL_MEMRCHR=0 fi AC_CHECK_FUNCS([memrchr]) ]) # Prerequisites of lib/memrchr.c. AC_DEFUN([gl_PREREQ_MEMRCHR], [:])