Allows kbuild to generate LLVM bitcode files with the .ll extension when building with Clang. # c code CC=clang make kernel/pid.ll # asm code CC=clang make arch/arm/kernel/calls.ll Signed-off-by: Vinícius Tinti <viniciustinti@xxxxxxxxx> Signed-off-by: Behan Webster <behanw@xxxxxxxxxxxxxxxxxx> --- Makefile | 7 +++++++ scripts/Makefile.build | 18 ++++++++++++++++++ 2 files changed, 25 insertions(+) diff --git a/Makefile b/Makefile index f3c543d..4eb0d14 100644 --- a/Makefile +++ b/Makefile @@ -1484,6 +1484,13 @@ endif %.symtypes: %.c prepare scripts FORCE $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +ifeq ($(COMPILER),clang) +%.ll: %.c prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +%.ll: %.S prepare scripts FORCE + $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@) +endif + # Modules /: prepare scripts FORCE $(cmd_crmodverdir) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index bf3e677..9ea19d6 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -174,6 +174,14 @@ cmd_cc_symtypes_c = \ $(obj)/%.symtypes : $(src)/%.c FORCE $(call cmd,cc_symtypes_c) +ifeq ($(COMPILER),clang) +quiet_cmd_cc_ll_c = CC $(quiet_modtag) $@ +cmd_cc_ll_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -emit-llvm -S -o $@ $< + +$(obj)/%.ll: $(src)/%.c FORCE + $(call if_changed_dep,cc_ll_c) +endif + # C (.c) files # The C file is compiled and updated dependency information is generated. # (See cmd_cc_o_c + relevant part of rule_cc_o_c) @@ -315,6 +323,16 @@ quiet_cmd_asn1_compiler = ASN.1 $@ $(obj)/%-asn1.c $(obj)/%-asn1.h: $(src)/%.asn1 $(objtree)/scripts/asn1_compiler $(call cmd,asn1_compiler) +# LLVM bitcode +# --------------------------------------------------------------------------- +ifeq ($(COMPILER),clang) +quiet_cmd_as_ll_S = CPP $(quiet_modtag) $@ +cmd_as_ll_S = $(CPP) $(a_flags) -o $@ $< + +$(obj)/%.ll: $(src)/%.S FORCE + $(call if_changed_dep,as_ll_S) +endif + # Build the compiled-in targets # --------------------------------------------------------------------------- -- 2.0.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
