1#serial 13 2 3# See if we need to emulate a missing ftruncate function using fcntl or chsize. 4 5# Copyright (C) 2000, 2001, 2003-2007 Free Software Foundation, Inc. 6# This file is free software; the Free Software Foundation 7# gives unlimited permission to copy and/or distribute it, 8# with or without modifications, as long as this notice is preserved. 9 10# FIXME: remove this macro, along with all uses of HAVE_FTRUNCATE in 2010, 11# if the check below provokes no more reports. So far, the only report 12# arose from a test build of this gnulib module, cross-compiling to mingw: 13# <http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/9203> 14 15AC_DEFUN([gl_FUNC_FTRUNCATE], 16[ 17 AC_REQUIRE([gl_UNISTD_H_DEFAULTS]) 18 AC_REQUIRE([AC_CANONICAL_HOST]) 19 AC_CHECK_FUNCS_ONCE([ftruncate]) 20 if test $ac_cv_func_ftruncate = no; then 21 HAVE_FTRUNCATE=0 22 AC_LIBOBJ([ftruncate]) 23 gl_PREREQ_FTRUNCATE 24 case "$host_os" in 25 mingw*) 26 # Yes, we know mingw lacks ftruncate. 27 ;; 28 *) 29 # If someone lacks ftruncate, make configure fail, and request 30 # a bug report to inform us about it. 31 if test x"$SKIP_FTRUNCATE_CHECK" != xyes; then 32 AC_MSG_FAILURE([Your system lacks the ftruncate function. 33 Please report this, along with the output of "uname -a", to the 34 bug-coreutils@gnu.org mailing list. To continue past this point, 35 rerun configure with SKIP_FTRUNCATE_CHECK=yes. 36 E.g., ./configure SKIP_FTRUNCATE_CHECK=yes]) 37 fi 38 esac 39 fi 40]) 41 42# Prerequisites of lib/ftruncate.c. 43AC_DEFUN([gl_PREREQ_FTRUNCATE], 44[ 45 AC_CHECK_FUNCS(chsize) 46]) 47