* lib/regex_internal.c (re_string_reconstruct): Handle

[gnulib.git] / m4 / ftruncate.m4

diff --git a/m4/ftruncate.m4 b/m4/ftruncate.m4
index 0397a00..e71e99b 100644 (file)
--- a/m4/ftruncate.m4
+++ b/m4/ftruncate.m4
@@ -1,14 +1,34 @@
-#serial 4
+#serial 10
 
 # See if we need to emulate a missing ftruncate function using fcntl or chsize.
 
-AC_DEFUN([jm_FUNC_FTRUNCATE],
-[
-  AC_CHECK_FUNCS(ftruncate, , [ftruncate_missing=yes])
+# Copyright (C) 2000, 2001, 2003-2006 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 2007,
+# if the check below provokes no reports.
 
-  if test "$ftruncate_missing" = yes; then
-    AC_CHECK_HEADERS([unistd.h])
-    AC_CHECK_FUNCS([chsize])
-    AC_LIBOBJ(ftruncate)
+AC_DEFUN([gl_FUNC_FTRUNCATE],
+[
+  AC_REPLACE_FUNCS(ftruncate)
+  if test $ac_cv_func_ftruncate = no; then
+    gl_PREREQ_FTRUNCATE
+    # If someone lacks ftruncate, make configure fail, and request
+    # a bug report to inform us about it.
+    if test x"$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
   fi
 ])
+
+# Prerequisites of lib/ftruncate.c.
+AC_DEFUN([gl_PREREQ_FTRUNCATE],
+[
+  AC_CHECK_FUNCS(chsize)
+])