3 # See if we need to emulate a missing ftruncate function using fcntl or chsize.
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.
10 # FIXME: remove this macro, along with all uses of HAVE_FTRUNCATE in 2007,
11 # if the check below provokes no reports.
13 AC_DEFUN([gl_FUNC_FTRUNCATE],
15 AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
16 AC_CHECK_FUNCS_ONCE([ftruncate])
17 if test $ac_cv_func_ftruncate = no; then
19 AC_LIBOBJ([ftruncate])
21 # If someone lacks ftruncate, make configure fail, and request
22 # a bug report to inform us about it.
23 if test x"$SKIP_FTRUNCATE_CHECK" != xyes; then
24 AC_MSG_FAILURE([Your system lacks the ftruncate function.
25 Please report this, along with the output of "uname -a", to the
26 bug-coreutils@gnu.org mailing list. To continue past this point,
27 rerun configure with SKIP_FTRUNCATE_CHECK=yes.
28 E.g., ./configure SKIP_FTRUNCATE_CHECK=yes])
33 # Prerequisites of lib/ftruncate.c.
34 AC_DEFUN([gl_PREREQ_FTRUNCATE],
36 AC_CHECK_FUNCS(chsize)