Since we're storing the firmware blobs in the QEMU git repository, it would be nice if the blobs would be a little bit smaller. By using -Os and -fno-asynchronous-unwind-tables the size of the s390-ccw.img can be decreased by ca. 4kB, and the size of s390-netboot.img even by ca. 45kB. The change of speed of the firmware should not really matter compared to a binary that has been compiled with -O2 since the firmware still starts very fast.
Signed-off-by: Thomas Huth <[email protected]> --- pc-bios/s390-ccw/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/pc-bios/s390-ccw/Makefile b/pc-bios/s390-ccw/Makefile index 439e3cc..f22a5ca 100644 --- a/pc-bios/s390-ccw/Makefile +++ b/pc-bios/s390-ccw/Makefile @@ -13,6 +13,7 @@ OBJECTS = start.o main.o bootmap.o jump2ipl.o sclp.o menu.o \ virtio.o virtio-scsi.o virtio-blkdev.o libc.o QEMU_CFLAGS := $(filter -W%, $(QEMU_CFLAGS)) +QEMU_CFLAGS += -Os -fno-asynchronous-unwind-tables QEMU_CFLAGS += -ffreestanding -fno-delete-null-pointer-checks -msoft-float QEMU_CFLAGS += -march=z900 -fPIE -fno-strict-aliasing QEMU_CFLAGS += $(call cc-option, $(QEMU_CFLAGS), -fno-stack-protector) -- 1.8.3.1
