Mercurial > gnulib
view m4/truncate.m4 @ 40195:9734faea5d7b
relocatable-prog: Use wrapper-free installation also on Mac OS X 10.4.
* m4/relocatable.m4 (gl_RELOCATABLE_BODY): Treat Mac OS X 10.4 like 10.5.
author | Bruno Haible <bruno@clisp.org> |
---|---|
date | Sun, 24 Feb 2019 00:25:02 +0100 |
parents | b06060465f09 |
children |
line wrap: on
line source
# 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], [:])