Index: kernel/arch/sparc64/Makefile.inc
===================================================================
--- kernel/arch/sparc64/Makefile.inc	(revision da349da00e6a694ae8529efd7efc34b7534e322f)
+++ kernel/arch/sparc64/Makefile.inc	(revision 88944695970ebfd82dce23b26a27ded9fda43fca)
@@ -30,9 +30,13 @@
 #
 
+ifndef CROSS_PREFIX
+	CROSS_PREFIX = /usr/local
+endif
+
 BFD_NAME = elf64-sparc
 BFD_ARCH = sparc
 BFD = binary
 TARGET = sparc64-linux-gnu
-TOOLCHAIN_DIR = /usr/local/sparc64
+TOOLCHAIN_DIR = $(CROSS_PREFIX)/sparc64
 
 GCC_CFLAGS += -m64 -mcpu=ultrasparc