--- gforth/lib.fs	2008/07/26 21:31:08	1.28
+++ gforth/lib.fs	2008/07/31 12:46:03	1.30
@@ -17,17 +17,23 @@
 \ You should have received a copy of the GNU General Public License
 \ along with this program. If not, see http://www.gnu.org/licenses/.
 
-s" libavcall.so"     open-lib 0<>
-s" libcallback.so"   open-lib 0<> and [if]
-    .( including fflib.fs [ffcall] )
-    include fflib.fs
+s" os-type" environment? [IF]
+    2dup s" linux-gnu" str= [IF] 2drop s" libffi.so"
+    [ELSE] 2dup s" bsd" search nip nip [IF] 2drop s" libffi.so"
+	[ELSE] 2dup s" cygwin" str= [IF] 2drop s" libffi.dll"
+	    [ELSE] 2dup s" darwin" str= [IF] 2drop s" libffi.dylib"
+		[ELSE] 2drop [THEN] [THEN] [THEN] [THEN] [THEN]
+open-lib [if]
+    .( including libffi.fs )
+    include libffi.fs
 [ELSE]
-    s" libffi.so" open-lib [if]
-        .( including libffi.fs )
-	include libffi.fs
+    s" libavcall.so"     open-lib 0<>
+    s" libcallback.so"   open-lib 0<> and [if]
+	.( including fflib.fs [ffcall] )
+	include fflib.fs
     [ELSE]
-        .( Neither libffi nor ffcall are available ) cr
-        abort
+	.( Neither libffi nor ffcall are available ) cr
+	abort
         .( Using oldlib.fs; incompatible with fflib.fs and libffi.fs) cr
 	include oldlib.fs
     [THEN]