diff options
Diffstat (limited to 'scripts/Makefile.build')
| -rw-r--r-- | scripts/Makefile.build | 97 |
1 files changed, 30 insertions, 67 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 4f2b25d43ec9..77cce68c4d63 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -73,11 +73,11 @@ endif ifneq ($(strip $(lib-y) $(lib-m) $(lib-)),) lib-target := $(obj)/lib.a -obj-y += $(obj)/lib-ksyms.o +real-obj-y += $(obj)/lib-ksyms.o endif -ifneq ($(strip $(obj-y) $(need-builtin)),) -builtin-target := $(obj)/built-in.o +ifneq ($(strip $(real-obj-y) $(need-builtin)),) +builtin-target := $(obj)/built-in.a endif modorder-target := $(obj)/modules.order @@ -104,7 +104,7 @@ ifneq ($(KBUILD_ENABLE_EXTRA_GCC_CHECKS),) cmd_checkdoc = $(srctree)/scripts/kernel-doc -none $< ; endif -# Do section mismatch analysis for each module/built-in.o +# Do section mismatch analysis for each module/built-in.a ifdef CONFIG_DEBUG_SECTION_MISMATCH cmd_secanalysis = ; scripts/mod/modpost $@ endif @@ -119,29 +119,17 @@ modkern_cflags = \ $(KBUILD_CFLAGS_KERNEL) $(CFLAGS_KERNEL)) quiet_modtag := $(empty) $(empty) -$(real-objs-m) : part-of-module := y -$(real-objs-m:.o=.i) : part-of-module := y -$(real-objs-m:.o=.s) : part-of-module := y -$(real-objs-m:.o=.lst): part-of-module := y +$(real-obj-m) : part-of-module := y +$(real-obj-m:.o=.i) : part-of-module := y +$(real-obj-m:.o=.s) : part-of-module := y +$(real-obj-m:.o=.lst): part-of-module := y -$(real-objs-m) : quiet_modtag := [M] -$(real-objs-m:.o=.i) : quiet_modtag := [M] -$(real-objs-m:.o=.s) : quiet_modtag := [M] -$(real-objs-m:.o=.lst): quiet_modtag := [M] +$(real-obj-m) : quiet_modtag := [M] +$(real-obj-m:.o=.i) : quiet_modtag := [M] +$(real-obj-m:.o=.s) : quiet_modtag := [M] +$(real-obj-m:.o=.lst): quiet_modtag := [M] -$(obj-m) : quiet_modtag := [M] - -# Default for not multi-part modules -modname = $(basetarget) - -$(multi-objs-m) : modname = $(modname-multi) -$(multi-objs-m:.o=.i) : modname = $(modname-multi) -$(multi-objs-m:.o=.s) : modname = $(modname-multi) -$(multi-objs-m:.o=.lst) : modname = $(modname-multi) -$(multi-objs-y) : modname = $(modname-multi) -$(multi-objs-y:.o=.i) : modname = $(modname-multi) -$(multi-objs-y:.o=.s) : modname = $(modname-multi) -$(multi-objs-y:.o=.lst) : modname = $(modname-multi) +$(obj-m) : quiet_modtag := [M] quiet_cmd_cc_s_c = CC $(quiet_modtag) $@ cmd_cc_s_c = $(CC) $(c_flags) $(DISABLE_LTO) -fverbose-asm -S -o $@ $< @@ -314,7 +302,7 @@ endef # List module undefined symbols (or empty line if not enabled) ifdef CONFIG_TRIM_UNUSED_KSYMS -cmd_undef_syms = $(NM) $@ | sed -n 's/^ \+U //p' | xargs echo +cmd_undef_syms = $(NM) $@ | sed -n 's/^ *U //p' | xargs echo else cmd_undef_syms = echo endif @@ -345,8 +333,8 @@ $(obj)/%.lst: $(src)/%.c FORCE modkern_aflags := $(KBUILD_AFLAGS_KERNEL) $(AFLAGS_KERNEL) -$(real-objs-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) -$(real-objs-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) +$(real-obj-m) : modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) +$(real-obj-m:.o=.s): modkern_aflags := $(KBUILD_AFLAGS_MODULE) $(AFLAGS_MODULE) # .S file exports must have their C prototypes defined in asm/asm-prototypes.h # or a file that it includes, in order to get versioned symbols. We build a @@ -424,7 +412,7 @@ endif $(obj)/%.o: $(src)/%.S $(objtool_dep) FORCE $(call if_changed_rule,as_o_S) -targets += $(real-objs-y) $(real-objs-m) $(lib-y) +targets += $(filter-out $(subdir-obj-y), $(real-obj-y)) $(real-obj-m) $(lib-y) targets += $(extra-y) $(MAKECMDGOALS) $(always) # Linker scripts preprocessor (.lds.S -> .lds) @@ -458,24 +446,16 @@ $(sort $(subdir-obj-y)): $(subdir-ym) ; # ifdef builtin-target -ifdef CONFIG_THIN_ARCHIVES - cmd_make_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) - cmd_make_empty_builtin = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) - quiet_cmd_link_o_target = AR $@ -else - cmd_make_builtin = $(LD) $(ld_flags) -r -o - cmd_make_empty_builtin = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) - quiet_cmd_link_o_target = LD $@ -endif - -# If the list of objects to link is empty, just create an empty built-in.o -cmd_link_o_target = $(if $(strip $(obj-y)),\ - $(cmd_make_builtin) $@ $(filter $(obj-y), $^) \ - $(cmd_secanalysis),\ - $(cmd_make_empty_builtin) $@) +# built-in.a archives are made with no symbol table or index which +# makes them small and fast, but unable to be used by the linker. +# scripts/link-vmlinux.sh builds an aggregate built-in.a with a symbol +# table and index. +quiet_cmd_ar_builtin = AR $@ + cmd_ar_builtin = rm -f $@; \ + $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(filter $(real-obj-y), $^) -$(builtin-target): $(obj-y) FORCE - $(call if_changed,link_o_target) +$(builtin-target): $(real-obj-y) FORCE + $(call if_changed,ar_builtin) targets += $(builtin-target) endif # builtin-target @@ -499,11 +479,8 @@ $(modorder-target): $(subdir-ym) FORCE ifdef lib-target quiet_cmd_link_l_target = AR $@ -ifdef CONFIG_THIN_ARCHIVES - cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) -else - cmd_link_l_target = rm -f $@; $(AR) rcs$(KBUILD_ARFLAGS) $@ $(lib-y) -endif +# lib target archives do get a symbol table and index +cmd_link_l_target = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(lib-y) $(lib-target): $(lib-y) FORCE $(call if_changed,link_l_target) @@ -549,22 +526,8 @@ $($(subst $(obj)/,,$(@:.o=-objs))) \ $($(subst $(obj)/,,$(@:.o=-y))) \ $($(subst $(obj)/,,$(@:.o=-m)))), $^) -cmd_link_multi-link = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) - -ifdef CONFIG_THIN_ARCHIVES - quiet_cmd_link_multi-y = AR $@ - cmd_link_multi-y = rm -f $@; $(AR) rcSTP$(KBUILD_ARFLAGS) $@ $(link_multi_deps) -else - quiet_cmd_link_multi-y = LD $@ - cmd_link_multi-y = $(cmd_link_multi-link) -endif - quiet_cmd_link_multi-m = LD [M] $@ -cmd_link_multi-m = $(cmd_link_multi-link) - -$(multi-used-y): FORCE - $(call if_changed,link_multi-y) -$(call multi_depend, $(multi-used-y), .o, -objs -y) +cmd_link_multi-m = $(LD) $(ld_flags) -r -o $@ $(link_multi_deps) $(cmd_secanalysis) $(multi-used-m): FORCE $(call if_changed,link_multi-m) @@ -572,7 +535,7 @@ $(multi-used-m): FORCE $(cmd_undef_syms); } > $(MODVERDIR)/$(@F:.o=.mod) $(call multi_depend, $(multi-used-m), .o, -objs -y -m) -targets += $(multi-used-y) $(multi-used-m) +targets += $(multi-used-m) targets := $(filter-out $(PHONY), $(targets)) # Descending |