diff --git a/virtio/Makefile b/virtio/Makefile
index 6cd4b53..c88de97 100644
--- a/virtio/Makefile
+++ b/virtio/Makefile
@@ -1,8 +1,11 @@
 
+#CFLAGS=-D_KERNEL -DDEBUG -m64 -xarch=sse2a -xmodel=kernel -g
 CFLAGS= -D_KERNEL -DDEBUG -m64 -mcmodel=kernel -mno-red-zone -ffreestanding -nodefaultlibs -Wall
 
+
 LDFLAGS=-r
 
+#CC=/opt/SUNWspro/bin/cc
 CC=gcc
 LD=/usr/ccs/bin/ld
 
diff --git a/virtio_blk/Makefile b/virtio_blk/Makefile
index 59d7492..ffe0927 100644
--- a/virtio_blk/Makefile
+++ b/virtio_blk/Makefile
@@ -1,8 +1,9 @@
 
-
+#CFLAGS= -D_KERNEL -DDEBUG -m64 -xarch=sse2a -xmodel=kernel -I ../virtio -g
 CFLAGS= -DDEBUG -D_KERNEL -m64 -mcmodel=kernel -mno-red-zone -ffreestanding -nodefaultlibs -I../virtio -Wall -g
 LDFLAGS=-r -dy -N misc/mac -N misc/virtio -N drv/blkdev
 
+#CC=/opt/SUNWspro/bin/cc
 CC=gcc
 LD=/usr/ccs/bin/ld
 all: vioblk
diff --git a/virtio_net/Makefile b/virtio_net/Makefile
index 4a6f510..2b12963 100644
--- a/virtio_net/Makefile
+++ b/virtio_net/Makefile
@@ -1,8 +1,9 @@
 
-
+#CFLAGS=-D_KERNEL -m64 -xarch=sse2a -xmodel=kernel -I ../virtio -g
 CFLAGS= -D_KERNEL -DDEBUG -m64 -mcmodel=kernel -mno-red-zone -ffreestanding -nodefaultlibs -I../virtio -Wall -g
 LDFLAGS=-r -dy -N misc/mac -N misc/virtio
 
+#CC=/opt/SUNWspro/bin/cc
 CC=gcc
 LD=/usr/ccs/bin/ld