Mercurial > gnulib
view m4/obstack-printf.m4 @ 40212:8da9577294da
unistr/*, uniconv/*: Fix undefined behaviour.
Reported by Jeffrey Walton <noloader@gmail.com>.
* lib/unistr/u-cpy.h (FUNC): Don't invoke memcpy with a zero size.
* lib/unistr/u-cpy-alloc.h (FUNC): Likewise.
* lib/uniconv/u8-conv-from-enc.c (u8_conv_from_encoding): Likewise.
* lib/uniconv/u8-conv-to-enc.c (u8_conv_to_encoding): Likewise.
author | Bruno Haible <bruno@clisp.org> |
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date | Sat, 09 Mar 2019 00:01:47 +0100 |
parents | b06060465f09 |
children |
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# obstack-printf.m4 serial 4 dnl Copyright (C) 2008-2019 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. dnl From Eric Blake. dnl Test whether obstack_printf() exists. For now, we assume that dnl obstack_vprintf behaves identically, so we only test for one. AC_DEFUN([gl_FUNC_OBSTACK_PRINTF], [ dnl Persuade glibc <stdio.h> to declare obstack_printf(), obstack_vprintf(). AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) AC_REQUIRE([gl_STDIO_H_DEFAULTS]) AC_CHECK_FUNCS_ONCE([obstack_printf]) if test $ac_cv_func_obstack_printf = no ; then gl_REPLACE_OBSTACK_PRINTF fi gl_DECL_OBSTACK_PRINTF ]) AC_DEFUN([gl_REPLACE_OBSTACK_PRINTF], [ AC_REQUIRE([gl_STDIO_H_DEFAULTS]) if test $ac_cv_func_obstack_printf = yes; then REPLACE_OBSTACK_PRINTF=1 fi ]) dnl Ensure obstack_printf() and obstack_vprintf() are declared dnl (whether or not they are being replaced). AC_DEFUN([gl_DECL_OBSTACK_PRINTF], [ AC_CHECK_DECLS_ONCE([obstack_printf]) if test $ac_cv_have_decl_obstack_printf = no; then HAVE_DECL_OBSTACK_PRINTF=0 fi ])