Mercurial > gnulib
view m4/iconv_h.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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# iconv_h.m4 serial 11 dnl Copyright (C) 2007-2019 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_ICONV_H], [ AC_REQUIRE([gl_ICONV_H_DEFAULTS]) dnl Execute this unconditionally, because ICONV_H may be set by other dnl modules, after this code is executed. gl_CHECK_NEXT_HEADERS([iconv.h]) dnl Check for declarations of anything we want to poison if the dnl corresponding gnulib module is not in use, and which is not dnl guaranteed by C89. gl_WARN_ON_USE_PREPARE([[#include <iconv.h> ]], [iconv iconv_open]) ]) dnl Unconditionally enables the replacement of <iconv.h>. AC_DEFUN([gl_REPLACE_ICONV_H], [ AC_REQUIRE([gl_ICONV_H_DEFAULTS]) ICONV_H='iconv.h' AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"]) ]) AC_DEFUN([gl_ICONV_MODULE_INDICATOR], [ dnl Use AC_REQUIRE here, so that the default settings are expanded once only. AC_REQUIRE([gl_ICONV_H_DEFAULTS]) gl_MODULE_INDICATOR_SET_VARIABLE([$1]) ]) AC_DEFUN([gl_ICONV_H_DEFAULTS], [ m4_ifdef([gl_ANSI_CXX], [AC_REQUIRE([gl_ANSI_CXX])]) GNULIB_ICONV=0; AC_SUBST([GNULIB_ICONV]) dnl Assume proper GNU behavior unless another module says otherwise. ICONV_CONST=; AC_SUBST([ICONV_CONST]) REPLACE_ICONV=0; AC_SUBST([REPLACE_ICONV]) REPLACE_ICONV_OPEN=0; AC_SUBST([REPLACE_ICONV_OPEN]) REPLACE_ICONV_UTF=0; AC_SUBST([REPLACE_ICONV_UTF]) ICONV_H=''; AC_SUBST([ICONV_H]) m4_ifdef([gl_POSIXCHECK], [ICONV_H='iconv.h'], [if m4_ifdef([gl_ANSI_CXX], [test "$CXX" != no], [false]); then dnl Override <fnmatch.h> always, to support the C++ GNULIB_NAMESPACE. ICONV_H='iconv.h' fi ]) AM_CONDITIONAL([GL_GENERATE_ICONV_H], [test -n "$ICONV_H"]) ])