kbuild: Build modules as '.ko'

Makefile

@@ -162,8 +162,10 @@ PERL		= perl
 MODFLAGS	= -DMODULE
 CFLAGS_MODULE   = $(MODFLAGS)
 AFLAGS_MODULE   = $(MODFLAGS)
+LDFLAGS_MODULE  = -r
 CFLAGS_KERNEL	=
 AFLAGS_KERNEL	=
+
 NOSTDINC_FLAGS  = -nostdinc -iwithprefix include
 
 CPPFLAGS	:= -D__KERNEL__ -Iinclude
@@ -174,7 +176,7 @@ AFLAGS		:= -D__ASSEMBLY__ $(CPPFLAGS)
 export	VERSION PATCHLEVEL SUBLEVEL EXTRAVERSION KERNELRELEASE ARCH \
 	CONFIG_SHELL TOPDIR HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \
 	CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \
-	HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB
+	HOSTCXX HOSTCXXFLAGS LDFLAGS_BLOB LDFLAGS_MODULE
 
 export CPPFLAGS NOSTDINC_FLAGS OBJCOPYFLAGS LDFLAGS
 export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE 
@@ -543,7 +545,7 @@ _modinst_:
 
 .PHONY: $(patsubst %, _modinst_%, $(SUBDIRS))
 $(patsubst %, _modinst_%, $(SUBDIRS)) :
-	$(Q)$(MAKE) -f scripts/Makefile.modinst obj=$(patsubst _modinst_%,%,$@)
+	$(Q)$(MAKE) -rR -f scripts/Makefile.modinst obj=$(patsubst _modinst_%,%,$@)
 else # CONFIG_MODULES
 
 # Modules not configured
@@ -709,8 +711,9 @@ cmd_rmclean	  = rm -f $(CLEAN_FILES)
 clean: archclean $(addprefix _clean_,$(clean-dirs))
 	$(call cmd,rmclean)
 	@find . $(RCS_FIND_IGNORE) \
-	 	\( -name '*.[oas]' -o -name '.*.cmd' -o -name '.*.d' \
-		-o -name '.*.tmp' \) -type f -print | xargs rm -f
+	 	\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
+		-o -name '.*.d' -o -name '.*.tmp' \) -type f \
+		-print | xargs rm -f
 
 # mrproper - delete configuration + modules + core files
 #

scripts/Makefile.build

@@ -46,7 +46,7 @@ endif
 endif
 
 __build: $(if $(KBUILD_BUILTIN),$(O_TARGET) $(L_TARGET) $(EXTRA_TARGETS)) \
-	 $(if $(KBUILD_MODULES),$(obj-m)) \
+	 $(if $(KBUILD_MODULES),$(obj-m:.o=.ko)) \
 	 $(subdir-ym) $(build-targets)
 	@:
 
@@ -172,21 +172,29 @@ endif
 #
 # Rule to link composite objects
 #
+quiet_cmd_link_multi-y = LD      $@
+cmd_link_multi-y = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.o=-objs))) $($(subst $(obj)/,,$(@:.o=-y)))),$^)
 
-quiet_cmd_link_multi = LD $(quiet_modtag)  $@
-cmd_link_multi = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) -r -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.o=-objs))) $($(subst $(obj)/,,$(@:.o=-y)))),$^)
+quiet_cmd_link_multi-m = LD [M]  $@
+cmd_link_multi-m = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_MODULE) -o $@ $(filter $(addprefix $(obj)/,$($(subst $(obj)/,,$(@:.ko=-objs))) $($(subst $(obj)/,,$(@:.ko=-y)))),$^)
+
+quiet_cmd_link_single-m = LD [M]  $@
+cmd_link_single-m = $(LD) $(LDFLAGS) $(EXTRA_LDFLAGS) $(LDFLAGS_MODULE) -o $@ $<
 
 # We would rather have a list of rules like
 # 	foo.o: $(foo-objs)
 # but that's not so easy, so we rather make all composite objects depend
 # on the set of all their parts
 $(multi-used-y) : %.o: $(multi-objs-y) FORCE
-	$(call if_changed,link_multi)
+	$(call if_changed,link_multi-y)
+
+$(multi-used-m:.o=.ko) : %.ko: $(multi-objs-m) FORCE
+	$(call if_changed,link_multi-m)
 
-$(multi-used-m) : %.o: $(multi-objs-m) FORCE
-	$(call if_changed,link_multi)
+$(single-used-m:.o=.ko) : %.ko: %.o FORCE
+	$(call if_changed,link_single-m)
 
-targets += $(multi-used-y) $(multi-used-m)
+targets += $(multi-used-y) $(multi-used-m:.o=.ko) $(single-used-m:.o=.ko)
 
 # Compile programs on the host
 # ===========================================================================

scripts/Makefile.lib

@@ -43,6 +43,7 @@ __obj-m = $(filter-out export.o,$(obj-m))
 multi-used-y := $(sort $(foreach m,$(__obj-y), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
 multi-used-m := $(sort $(foreach m,$(__obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y))), $(m))))
 multi-used   := $(multi-used-y) $(multi-used-m)
+single-used-m := $(filter-out $(multi-used-m),$(obj-m))
 
 # Build list of the parts of our composite objects, our composite
 # objects depend on those (obviously)
@@ -99,6 +100,7 @@ export-objs	:= $(addprefix $(obj)/,$(export-objs))
 subdir-obj-y	:= $(addprefix $(obj)/,$(subdir-obj-y))
 real-objs-y	:= $(addprefix $(obj)/,$(real-objs-y))
 real-objs-m	:= $(addprefix $(obj)/,$(real-objs-m))
+single-used-m	:= $(addprefix $(obj)/,$(single-used-m))
 multi-used-y	:= $(addprefix $(obj)/,$(multi-used-y))
 multi-used-m	:= $(addprefix $(obj)/,$(multi-used-m))
 multi-objs-y	:= $(addprefix $(obj)/,$(multi-objs-y))

scripts/Makefile.modinst

@@ -15,12 +15,12 @@ include scripts/Makefile.lib
 
 # ==========================================================================
 
-quiet_cmd_modules_install = INSTALL $(obj-m)
+quiet_cmd_modules_install = INSTALL $(obj-m:.o=.ko)
       cmd_modules_install = mkdir -p $(MODLIB)/kernel && \
-		      cp $(obj-m) $(MODLIB)/kernel/
+		      cp $(obj-m:.o=.ko) $(MODLIB)/kernel/
 
 modules_install: $(subdir-ym)
-ifneq ($(obj-m),)
+ifneq ($(obj-m:.o=.ko),)
 	$(call cmd,modules_install)
 else
 	@: