3 # See if we need to emulate a missing ftruncate function using fcntl or chsize.
5 # Copyright (C) 2000, 2001, 2003-2007, 2009 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.
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>
15 AC_DEFUN([gl_FUNC_FTRUNCATE],
17 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
18 AC_REQUIRE([AC_CANONICAL_HOST])
19 AC_CHECK_FUNCS_ONCE([ftruncate])
20 if test $ac_cv_func_ftruncate = no; then
22 AC_LIBOBJ([ftruncate])
26 # Yes, we know mingw lacks ftruncate.
29 # If someone lacks ftruncate, make configure fail, and request
30 # a bug report to inform us about it.
31 if test x"$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])
42 # Prerequisites of lib/ftruncate.c.
43 AC_DEFUN([gl_PREREQ_FTRUNCATE],
45 AC_CHECK_FUNCS([chsize])