cmd_modversions_c implements two parts; run genksyms to calculate CRCs of exported symbols, run $(LD) to update the object with the CRCs. The latter is not executed for CONFIG_LTO_CLANG=y since the object is not ELF but LLVM bit code at this point. The first part can be unified because we can always use $(NM) instead of "$(OBJDUMP) -h" to dump the symbols. Split the code into the two macros, cmd_gen_symversions_c and cmd_modversions. Signed-off-by: Masahiro Yamada <masahiroy@xxxxxxxxxx> --- Changes in v2: - new scripts/Makefile.build | 25 +++++++++++-------------- 1 file changed, 11 insertions(+), 14 deletions(-) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index d934bdf84de4..ba2be555f942 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -169,29 +169,25 @@ ifdef CONFIG_MODVERSIONS # the actual value of the checksum generated by genksyms # o remove .tmp_<file>.o to <file>.o -ifdef CONFIG_LTO_CLANG # Generate .o.symversions files for each .o with exported symbols, and link these # to the kernel and/or modules at the end. -cmd_modversions_c = \ +gen_symversions = \ if $(NM) $@ 2>/dev/null | grep -q __ksymtab; then \ - $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ + $(call cmd_gensymtypes_$(1),$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ > $@.symversions; \ else \ rm -f $@.symversions; \ - fi; -else -cmd_modversions_c = \ - if $(OBJDUMP) -h $@ | grep -q __ksymtab; then \ - $(call cmd_gensymtypes_c,$(KBUILD_SYMTYPES),$(@:.o=.symtypes)) \ - > $(@D)/.tmp_$(@F:.o=.ver); \ - \ + fi + +cmd_gen_symversions_c = $(call gen_symversions,c) + +cmd_modversions = \ + if [ -r $@.symversions ]; then \ $(LD) $(KBUILD_LDFLAGS) -r -o $(@D)/.tmp_$(@F) $@ \ - -T $(@D)/.tmp_$(@F:.o=.ver); \ + -T $@.symversions; \ mv -f $(@D)/.tmp_$(@F) $@; \ - rm -f $(@D)/.tmp_$(@F:.o=.ver); \ fi endif -endif ifdef CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT # compiler will not generate __mcount_loc use recordmcount or recordmcount.pl @@ -269,7 +265,8 @@ define rule_cc_o_c $(call cmd,checksrc) $(call cmd,checkdoc) $(call cmd,gen_objtooldep) - $(call cmd,modversions_c) + $(call cmd,gen_symversions_c) + $(if $(CONFIG_LTO_CLANG),,$(call cmd,modversions)) $(call cmd,record_mcount) endef -- 2.32.0
