Index: kernel/arch/sparc64/Makefile.inc
===================================================================
--- kernel/arch/sparc64/Makefile.inc	(revision 55896b6837c19f8fe505af9cbe31069aa02c168b)
+++ kernel/arch/sparc64/Makefile.inc	(revision db80a2ea760b13900950dfbd9d3aebc19189973a)
@@ -32,5 +32,4 @@
 
 GCC_CFLAGS += -m64 -mcpu=ultrasparc -mcmodel=medlow -mno-fpu
-SUNCC_CFLAGS += -m64 -xarch=sparc -xregs=appl,no%float
 
 LFLAGS += -no-check-sections