linux/scripts/Makefile.modbuiltin
Michal Marek bc081dd6e9 kbuild: generate modules.builtin
To make it easier for module-init-tools and scripts like mkinitrd to
distinguish builtin and missing modules, install a modules.builtin file
listing all builtin modules. This is done by generating an additional
config file (tristate.conf) with tristate options set to uppercase 'Y'
or 'M'. If we source that config file, the builtin modules appear in
obj-Y.

Signed-off-by: Michal Marek <mmarek@suse.cz>
2009-12-12 13:08:16 +01:00

56 lines
1.7 KiB
Makefile

# ==========================================================================
# Generating modules.builtin
# ==========================================================================
src := $(obj)
PHONY := __modbuiltin
__modbuiltin:
-include include/config/auto.conf
# tristate.conf sets tristate variables to uppercase 'Y' or 'M'
# That way, we get the list of built-in modules in obj-Y
-include include/config/tristate.conf
include scripts/Kbuild.include
# The filename Kbuild has precedence over Makefile
kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
kbuild-file := $(if $(wildcard $(kbuild-dir)/Kbuild),$(kbuild-dir)/Kbuild,$(kbuild-dir)/Makefile)
include $(kbuild-file)
include scripts/Makefile.lib
__subdir-Y := $(patsubst %/,%,$(filter %/, $(obj-Y)))
subdir-Y += $(__subdir-Y)
subdir-ym := $(sort $(subdir-y) $(subdir-Y) $(subdir-m))
subdir-ym := $(addprefix $(obj)/,$(subdir-ym))
obj-Y := $(addprefix $(obj)/,$(obj-Y))
modbuiltin-subdirs := $(patsubst %,%/modules.builtin, $(subdir-ym))
modbuiltin-mods := $(filter %.ko, $(obj-Y:.o=.ko))
modbuiltin-target := $(obj)/modules.builtin
__modbuiltin: $(modbuiltin-target) $(subdir-ym)
@:
$(modbuiltin-target): $(subdir-ym) FORCE
$(Q)(for m in $(modbuiltin-mods); do echo kernel/$$m; done; \
cat /dev/null $(modbuiltin-subdirs)) > $@
PHONY += FORCE
FORCE:
# Descending
# ---------------------------------------------------------------------------
PHONY += $(subdir-ym)
$(subdir-ym):
$(Q)$(MAKE) $(modbuiltin)=$@
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable se we can use it in if_changed and friends.
.PHONY: $(PHONY)