Mercurial > gnulib
view m4/jm-winsz1.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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# serial 12 # Copyright (C) 1996, 1999, 2001-2002, 2004, 2006, 2009-2019 Free Software # Foundation, Inc. # This file is free software; the Free Software Foundation # gives unlimited permission to copy and/or distribute it, # with or without modifications, as long as this notice is preserved. dnl From Jim Meyering and Paul Eggert. AC_DEFUN([gl_HEADER_TIOCGWINSZ_IN_TERMIOS_H], [AC_REQUIRE([AC_SYS_POSIX_TERMIOS]) AC_CACHE_CHECK([whether use of TIOCGWINSZ requires termios.h], [gl_cv_sys_tiocgwinsz_needs_termios_h], [gl_cv_sys_tiocgwinsz_needs_termios_h=no if test $ac_cv_sys_posix_termios = yes; then AC_EGREP_CPP([yes], [#include <sys/types.h> # include <termios.h> # ifdef TIOCGWINSZ yes # endif ], [gl_cv_sys_tiocgwinsz_needs_termios_h=yes]) fi ]) ]) AC_DEFUN([gl_WINSIZE_IN_PTEM], [ AC_REQUIRE([AC_SYS_POSIX_TERMIOS]) AC_CACHE_CHECK([whether use of struct winsize requires sys/ptem.h], [gl_cv_sys_struct_winsize_needs_sys_ptem_h], [gl_cv_sys_struct_winsize_needs_sys_ptem_h=yes if test $ac_cv_sys_posix_termios = yes; then AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <termios.h>]], [[struct winsize x; if (sizeof x > 0) return 0;]])], [gl_cv_sys_struct_winsize_needs_sys_ptem_h=no]) fi if test $gl_cv_sys_struct_winsize_needs_sys_ptem_h = yes; then AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <sys/ptem.h>]], [[struct winsize x; if (sizeof x > 0) return 0;]])], [], [gl_cv_sys_struct_winsize_needs_sys_ptem_h=no]) fi]) if test $gl_cv_sys_struct_winsize_needs_sys_ptem_h = yes; then AC_DEFINE([WINSIZE_IN_PTEM], [1], [Define if sys/ptem.h is required for struct winsize.]) fi ])