--- a/debian/rules	2010-08-18 10:53:08.000000000 +0900
+++ b/debian/rules	2010-08-18 10:53:20.000000000 +0900
@@ -34,6 +34,9 @@
 CFLAGS += -O3
 endif
 
+ifeq ($(DEB_BUILD_GNU_CPU),sh4)
+  CFLAGS += -mieee
+endif
 
 build: build-stamp
 build-stamp: