[coreboot-gerrit] [M] Change in coreboot[master]: arch,toolchain,xcompile: Use the compiler frontend as a linker

[Paul Menzel (Code Review)]

Attention is currently required from: Raul Rangel, Stefan Reinauer, Julius Werner, Jacob Garber, Iru Cai, Elyes Haouas.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/40811 )

Change subject: arch,toolchain,xcompile: Use the compiler frontend as a linker
......................................................................

Patch Set 15:

(1 comment)

File src/cpu/x86/smm/Makefile.inc:

https://review.coreboot.org/c/coreboot/+/40811/comment/58e7ae8b_bf435e86 
PS15, Line 18: 	$(CC_smm) $(CFLAGS_smm) -r -o $@ $(COMPILER_RT_FLAGS_smm) -Wl,--whole-archive,--start-group $(filter-out %.ld, $(smm-objs)) -Wl,--no-whole-archive $(COMPILER_RT_smm) -Wl,--end-group
Passing `$(CFLAGS_smm)` it links besides twelve board configs:

*   clang.GOOGLE_BERKNIP
*   clang.GOOGLE_DALBOZ
*   clang.GOOGLE_DIRINBOZ
*   clang.GOOGLE_EZKINIL
*   clang.GOOGLE_GUMBOZ
*   clang.GOOGLE_MORPHIUS
*   clang.GOOGLE_SHUBOZ
*   clang.GOOGLE_SKYRIM.NO_VIDEO
*   clang.GOOGLE_TREMBYLE
*   clang.GOOGLE_VILBOZ.X86_64
*   clang.GOOGLE_VILBOZ
*   clang.GOOGLE_WOOMAX

They want to use the LLVM linker LLD for some reason:

LINK       cbfs/fallback/verstage.debug
    clang-15: error: unable to execute command: Executable "ld.lld" doesn't exist!
    clang-15: error: ld.lld command failed with exit code 1 (use -v to see invocation)
    make[2]: *** [src/arch/arm/Makefile.inc:64: /cb-build/coreboot-gerrit.0/clang/GOOGLE_BERKNIP/cbfs/fallback/verstage.debug] Error 1