[PATCH u-boot v4 14/36] build: support building with Link Time Optimizations
trini at konsulko.com
Tue May 25 02:55:32 CEST 2021
On Thu, May 20, 2021 at 01:24:03PM +0200, Marek Behún wrote:
> Add plumbing for building U-Boot with Link Time Optimizations.
> When building with LTO, $(PLATFORM_LIBS) has to be in --whole-archive /
> --no-whole-archive group, otherwise some functions declared in assembly
> may not be resolved and linking may fail.
> Note: clang may throw away linker list symbols it thinks are unused when
> compiling with LTO. To force these symbols to be included, we refer to
> them via the __ADDRESSABLE macro in a C file generated from compiled
> built-in.o files before linking.
> Signed-off-by: Marek Behún <marek.behun at nic.cz>
> Reviewed-by: Simon Glass <sjg at chromium.org>
Applied to u-boot/master, thanks!
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