Hello ron minnich, build bot (Jenkins), Philipp Hug, Patrick Georgi, Martin Roth,
I'd like you to reexamine a change. Please visit
https://review.coreboot.org/c/coreboot/+/38989
to look at the new patch set (#4).
Change subject: [TEST] Add support for link time optimization ......................................................................
[TEST] Add support for link time optimization
- Code generation is not done until after linking, so the compiler must be invoked at all linking stages instead of the linker. As a consequence all linker arguments must be prefixed with -Wl. - Partial linking is not supported. Instead, object files are collected into thin archives that are linked instead. - Wrapping libgcc functions causes a symbol mismatch when using LTO. Wrapping these functions was originally done to support alternate regparam values, though AFAICT this isn't used anywhere.
Using LTO leads to a ~10% decrease in stage size for QEMU and ~18% for the Thinkpad T500, and both targets boot successfully.
Change-Id: I48c31ea8b1b57276125cffdac44c7c16642547ac Signed-off-by: Jacob Garber jgarber1@ualberta.ca --- M Makefile.inc M src/Kconfig M src/arch/arm/Makefile.inc M src/arch/arm64/Makefile.inc M src/arch/ppc64/Makefile.inc M src/arch/riscv/Makefile.inc M src/arch/x86/Makefile.inc M src/cpu/x86/smm/Makefile.inc M src/lib/Makefile.inc M src/lib/gcc.c M toolchain.inc M util/xcompile/xcompile 12 files changed, 61 insertions(+), 44 deletions(-)
git pull ssh://review.coreboot.org:29418/coreboot refs/changes/89/38989/4