alien.inline.compiler: x86_64 check and hook methods

basis/alien/inline/compiler/compiler.factor

@@ -2,7 +2,7 @@
 ! See http://factorcode.org/license.txt for BSD license.
 USING: accessors arrays combinators fry generalizations
 io.encodings.ascii io.files io.files.temp io.launcher kernel
-locals sequences system ;
+locals sequences system words ;
 IN: alien.inline.compiler
 
 SYMBOL: C
@@ -27,20 +27,28 @@ SYMBOL: C++
         { C++ [ "g++" ] }
     } case ;
 
+HOOK: compiler-descr os ( lang -- descr )
+
+M: word compiler-descr compiler 1array ;
+M: macosx compiler-descr
+    call-next-method cpu x86.64?
+    [ { "-arch" "x86_64" } append ] when ;
+
+HOOK: link-descr os ( -- descr )
+
+M: word link-descr { "-shared" "-o" } ;
+M: macosx link-descr
+    { "-g" "-prebind" "-dynamiclib" "-o" }
+    cpu x86.64? [ { "-arch" "x86_64" } prepend ] when ;
+
 : link-command ( in out lang -- descr )
-    compiler os {
-        { [ dup linux? ]
-          [ drop { "-shared" "-o" } ] }
-        { [ dup macosx? ]
-          [ drop { "-g" "-prebind" "-dynamiclib" "-o" } ] }
-        [ name>> "unimplemented for: " prepend throw ]
-    } cond swap prefix prepend prepend ;
+    compiler-descr link-descr append prepend prepend ;
 
 :: compile-to-object ( lang contents name -- )
     name ".o" append temp-file
     contents name lang src-suffix append temp-file
     [ ascii set-file-contents ] keep 2array
-    { "-fPIC" "-c" "-o" } lang compiler prefix prepend
+    lang compiler-descr { "-fPIC" "-c" "-o" } append prepend
     try-process ;
 
 :: link-object ( lang args name -- )