view m4/vasprintf.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>
date Sat, 09 Mar 2019 00:01:47 +0100
parents b06060465f09
children
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# vasprintf.m4 serial 6
dnl Copyright (C) 2002-2003, 2006-2007, 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_VASPRINTF],
[
  AC_CHECK_FUNCS([vasprintf])
  if test $ac_cv_func_vasprintf = no; then
    gl_REPLACE_VASPRINTF
  fi
])

AC_DEFUN([gl_REPLACE_VASPRINTF],
[
  AC_LIBOBJ([vasprintf])
  AC_LIBOBJ([asprintf])
  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
  if test $ac_cv_func_vasprintf = yes; then
    REPLACE_VASPRINTF=1
  else
    HAVE_VASPRINTF=0
  fi
  gl_PREREQ_VASPRINTF_H
  gl_PREREQ_VASPRINTF
  gl_PREREQ_ASPRINTF
])

# Prerequisites of the vasprintf portion of lib/stdio.h.
AC_DEFUN([gl_PREREQ_VASPRINTF_H],
[
  dnl Persuade glibc <stdio.h> to declare asprintf() and vasprintf().
  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
])

# Prerequisites of lib/vasprintf.c.
AC_DEFUN([gl_PREREQ_VASPRINTF],
[
])

# Prerequisites of lib/asprintf.c.
AC_DEFUN([gl_PREREQ_ASPRINTF],
[
])