--- mozilla-release.orig/js/src/Makefile.in	2011-07-08 03:15:23.000000000 +0200
+++ mozilla-release/js/src/Makefile.in	2011-07-29 15:50:36.000000000 +0200
@@ -391,7 +391,7 @@ CPPSRCS += 	checks.cc \
 # END enclude sources for V8 dtoa
 #############################################
 
-ifeq (,$(filter-out powerpc sparc,$(TARGET_CPU)))
+ifeq (,$(filter arm %86 x86_64,$(TARGET_CPU)))
 
 VPATH +=	$(srcdir)/assembler \
 		$(srcdir)/assembler/wtf \