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view m4/truncate.m4 @ 40140:81f075eaa990
ptsname_r: Work around bug on Android 4.3.
* m4/ptsname_r.m4 (gl_FUNC_PTSNAME_R): Define
HAVE_ESSENTIALLY_WORKING_PTSNAME_R. Test whether the return value is
correct.
* lib/ptsname_r.c (__ptsname_r): If HAVE_ESSENTIALLY_WORKING_PTSNAME_R
is defined, just fix the return value.
* doc/glibc-functions/ptsname_r.texi: Mention the Android bug. Reword:
The behaviour of musl libc is nothing to be "fixed", since it is
compliant with the next POSIX standard.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sat, 26 Jan 2019 15:23:19 +0100 |
parents | b06060465f09 |
children |
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# truncate.m4 serial 2 -*- Autoconf -*- dnl Copyright (C) 2017-2019 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_FUNC_TRUNCATE], [ AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) AC_CHECK_FUNCS_ONCE([truncate]) dnl AC_CHECK_FUNC is not enough here, because when compiling for Android 4.4 dnl or older with _FILE_OFFSET_BITS=64, truncate() is not declared. There dnl is a function 'truncate' in libc, but it is unsuitable, because it takes dnl only a 32-bit offset argument. AC_CHECK_DECL([truncate], , , [[#include <unistd.h>]]) if test $ac_cv_have_decl_truncate = yes; then m4_ifdef([gl_LARGEFILE], [ AC_REQUIRE([AC_CANONICAL_HOST]) case "$host_os" in mingw*) dnl Native Windows, and Large File Support is requested. dnl The mingw64 truncate64() function is based on ftruncate64(), dnl which is unreliable (it may delete the file, see dnl <http://mingw-w64.sourcearchive.com/documentation/2.0-1/ftruncate64_8c_source.html>). dnl Use gnulib's ftruncate() and truncate() implementation instead. REPLACE_TRUNCATE=1 ;; esac ], [ : ]) else HAVE_DECL_TRUNCATE=0 if test $ac_cv_func_truncate = yes; then dnl Avoid a conflict with the 'truncate' in libc. REPLACE_TRUNCATE=1 fi fi ]) # Prerequisites of lib/truncate.c. AC_DEFUN([gl_PREREQ_TRUNCATE], [:])