Imported Upstream version 3.1.0

[debian/amanda] / config / gnulib / ftruncate.m4

diff --git a/config/gnulib/ftruncate.m4 b/config/gnulib/ftruncate.m4
new file mode 100644 (file)
index 0000000..e43c15f
--- /dev/null
+++ b/config/gnulib/ftruncate.m4
@@ -0,0 +1,46 @@
+# serial 14
+
+# See if we need to emulate a missing ftruncate function using fcntl or chsize.
+
+# Copyright (C) 2000, 2001, 2003-2007, 2009 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 2010,
+# 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>
+
+AC_DEFUN([gl_FUNC_FTRUNCATE],
+[
+  AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS_ONCE([ftruncate])
+  if test $ac_cv_func_ftruncate = no; then
+    HAVE_FTRUNCATE=0
+    AC_LIBOBJ([ftruncate])
+    gl_PREREQ_FTRUNCATE
+    case "$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])
+])