--- gforth/envos.fs.in	2007/12/04 18:57:58	1.3
+++ gforth/envos.fs.in	2008/09/18 15:47:04	1.10
@@ -1,12 +1,12 @@
 \ envos.fs set os-specific environmental queries 	07jul97jaw
 
-\ Copyright (C) 1997,1999,2000,2003,2006 Free Software Foundation, Inc.
+\ Copyright (C) 1997,1999,2000,2003,2006,2007,2008 Free Software Foundation, Inc.
 
 \ This file is part of Gforth.
 
 \ Gforth is free software; you can redistribute it and/or
 \ modify it under the terms of the GNU General Public License
-\ as published by the Free Software Foundation; either version 2
+\ as published by the Free Software Foundation, either version 3
 \ of the License, or (at your option) any later version.
 
 \ This program is distributed in the hope that it will be useful,
@@ -15,8 +15,7 @@
 \ GNU General Public License for more details.
 
 \ You should have received a copy of the GNU General Public License
-\ along with this program; if not, write to the Free Software
-\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
+\ along with this program. If not, see http://www.gnu.org/licenses/.
 
 get-current environment-wordlist set-current
 : os-class ( -- c-addr u ) \ gforth-environment
@@ -30,3 +29,20 @@ set-current
 : libtool-command ( -- c-addr u ) \ gforth
 \G name of the GNU libtool command
     s" @GNU_LIBTOOL@" ;
+
+: libtool-cc ( -- c-addr u ) \ gforth
+\G invocation string of the C compiler used for libtool
+    s" @CC@" ;
+
+: libtool-flags ( -- c-addr u ) \ gforth
+\G force no undefined for cygwin
+    [ s" @host_os@" s" cygwin" str= ] [IF]  s"  -no-undefined "
+    [ELSE]  s" "  [THEN] ;
+
+\ test for the presence of libffi or ffcall
+@FFCALLFLAG@ constant ffcall-present \ libffi present (on building)
+@LIBFFIFLAG@ constant libffi-present \ ffcall libs present (on building)
+
+: include-ffi.h-string ( -- c-addr u )
+  s" #include <@FFI_H_NAME@>" ;
+