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qemu/ipxe-use-gcc6-for-more-compact-code.patch
Bruce Rogers efcf6cdbc8 Accepting request 655897 from Virtualization:Staging
Update to qemu 3.1.0-rc5. Is almost certainly the last rc, so should be same as 3.1.0 final. Putting into devel project 'early' because of SLE and Leap needs, not to get into Factory early. Look for the final 3.1 within a week.

OBS-URL: https://build.opensuse.org/request/show/655897
OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=433
2018-12-06 21:20:59 +00:00

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ipxe: use gcc6 for more compact code
We have a strict size limit of 64K which needs to be enforced for
pxe-virtio.rom for migration compatibility. The v4.8 gcc compiler
used in SLE12 doesn't produce as compact code as does more recent
gcc compilers, and the pxe-virtio.rom produced with it doesn't fit
in 64K anymore without taking extraordinary efforts. I was unable
to find enough opportunities in the ipxe code and data to reduce
its size, and found that using a more recent compiler would be the
best solution to keeping the rom size within the 64K size limit.
Signed-off-by: Bruce Rogers <brogers@suse.com>
--- a/src/Makefile
+++ b/src/Makefile
@@ -24,7 +24,7 @@ ECHO := echo
PRINTF := printf
PERL := perl
TRUE := true
-CC := $(CROSS_COMPILE)gcc
+CC := $(CROSS_COMPILE)gcc-6
CPP := $(CC) -E
AS := $(CROSS_COMPILE)as
LD := $(CROSS_COMPILE)ld