Added heuristic for passing arg via responsefiles.

Since gnu make and other tools under windows seem to have a limit
of around 8000 bytes per command line the arguments should be
passed via responsefiles instead.
Bug 18308

1 files changed, 7 insertions, 2 deletions

diff --git a/driver/Assembler.ml b/driver/Assembler.ml
index 52fb17d8..d6cb65ea 100644
--- a/driver/Assembler.ml
+++ b/driver/Assembler.ml
@@ -18,12 +18,17 @@ open Driveraux
 (* From asm to object file *)
 
 let assemble ifile ofile =
-  let cmd = List.concat [
-    Configuration.asm;
+  let cmd,opts = match Configuration.asm with
+  | name::opts -> name,opts
+  | [] -> assert false (* Should be catched in Configuration *) in
+  let opts = List.concat [
+    opts;
     ["-o"; ofile];
     List.rev !assembler_options;
     [ifile]
   ] in
+  let opts = responsefile opts (fun a -> if gnu_system then ["@"^a] else ["@"^a]) in
+  let cmd = cmd::opts in
   let exc = command cmd in
   if exc <> 0 then begin
     safe_remove ofile;