enable x86_64 vm

code/unix/Makefile

@@ -161,8 +161,8 @@ ifeq ($(PLATFORM),linux)
     OPTIMIZE = -O3 -fomit-frame-pointer -ffast-math -funroll-loops \
       -falign-loops=2 -falign-jumps=2 -falign-functions=2 \
       -fstrength-reduce
-    # experimental x86_64 jit compiler! you need as
-    #HAVE_VM_COMPILED = true
+    # experimental x86_64 jit compiler! you need GNU as
+    HAVE_VM_COMPILED = true
   else
   ifeq ($(ARCH),i386)
     OPTIMIZE = -O3 -march=i686 -fomit-frame-pointer -ffast-math \