> Thanks both!
For modules the Makefile needs to be adjusted to run final LTO before
modpost etc. These were the respective hunks from the old patchkit
(may need some tweaks)
@@ -154,7 +154,7 @@ is-single-obj-m = $(and $(part-of-module),$(filter $@,
$(obj-m)),y)
# When a module consists of a single object, there is no reason to keep LLVM
IR.
# Make $(LD) covert LLVM IR to ELF here.
ifdef CONFIG_LTO
-cmd_ld_single_m = $(if $(is-single-obj-m), ; $(LD) $(ld_flags) -r -o
$(tmp-target) $@; mv $(tmp-target) $@)
+cmd_ld_single_m = $(if $(is-single-obj-m), ; $(LDFINAL) $(ld_flags) -r -o
$(tmp-target) $@; mv $(tmp-target) $@)
endif
quiet_cmd_cc_o_c = CC $(quiet_modtag) $@
@@ -265,7 +265,8 @@ $(obj)/%.usyms: $(obj)/%.o FORCE
$(call if_changed,undefined_syms)
quiet_cmd_cc_lst_c = MKLST $@
- cmd_cc_lst_c = $(CC) $(c_flags) -g -c -o $*.o $< && \
+ cmd_cc_lst_c = $(if $(CONFIG_LTO),$(warning Listing in LTO mode does not
match final binary)) \
+ $(CC) $(c_flags) -g -c -o $*.o $< && \
$(CONFIG_SHELL) $(srctree)/scripts/makelst $*.o \
System.map $(OBJDUMP) > $@
@@ -446,8 +447,8 @@ $(obj)/modules.order: $(obj-m) FORCE
$(obj)/lib.a: $(lib-y) FORCE
$(call if_changed,ar)
-quiet_cmd_ld_multi_m = LD [M] $@
- cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@)
$(cmd_objtool)
+quiet_cmd_ld_multi_m = LDFINAL [M] $@
+ cmd_ld_multi_m = $(LDFINAL) $(ld_flags) -r -o $@ @$(patsubst
%.o,%.mod,$@) $(cmd_objtool)
define rule_ld_multi_m
$(call cmd_and_savecmd,ld_multi_m)
