On Thu, 20 May 2021 at 05:25, Marek Behún <marek.be...@nic.cz> 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.be...@nic.cz> > --- > Kbuild | 2 + > Kconfig | 24 ++++++++++ > Makefile | 67 ++++++++++++++++++++++++++- > scripts/Makefile.lib | 3 ++ > scripts/Makefile.spl | 44 +++++++++++++++++- > scripts/gen_ll_addressable_symbols.sh | 12 +++++
That is very long. How about gen_linkerlist_syms.sh ? > 6 files changed, 149 insertions(+), 3 deletions(-) > create mode 100755 scripts/gen_ll_addressable_symbols.sh Reviewed-by: Simon Glass <s...@chromium.org>
