-#serial 8
+# serial 16
# See if we need to emulate a missing ftruncate function using fcntl or chsize.
-# Copyright (C) 2000, 2001, 2003, 2004, 2005 Free Software Foundation, Inc.
+# Copyright (C) 2000-2001, 2003-2007, 2009-2011 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
+# FIXME: remove this macro, along with all uses of HAVE_FTRUNCATE in 2012,
+# if the check below provokes no more reports. So far, the only report
+# arose from a test build of this gnulib module, cross-compiling to mingw:
+# <http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/9203>
+# Now (in 2010), MSVC has been raised as a possible target:
+# <http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/21394/focus=21396>
+
AC_DEFUN([gl_FUNC_FTRUNCATE],
[
- AC_REPLACE_FUNCS(ftruncate)
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST])
+ AC_CHECK_FUNCS_ONCE([ftruncate])
if test $ac_cv_func_ftruncate = no; then
- gl_PREREQ_FTRUNCATE
+ HAVE_FTRUNCATE=0
+ case "$host_os" in
+ mingw*)
+ # Yes, we know mingw lacks ftruncate.
+ ;;
+ *)
+ # If someone lacks ftruncate, make configure fail, and request
+ # a bug report to inform us about it.
+ if test x"$SKIP_FTRUNCATE_CHECK" != xyes; then
+ AC_MSG_FAILURE([Your system lacks the ftruncate function.
+ Please report this, along with the output of "uname -a", to the
+ bug-coreutils@gnu.org mailing list. To continue past this point,
+ rerun configure with SKIP_FTRUNCATE_CHECK=yes.
+ E.g., ./configure SKIP_FTRUNCATE_CHECK=yes])
+ fi
+ esac
fi
])
# Prerequisites of lib/ftruncate.c.
AC_DEFUN([gl_PREREQ_FTRUNCATE],
[
- AC_CHECK_FUNCS(chsize)
+ AC_CHECK_FUNCS([chsize])
])