Commit ac7e7353 authored by Masahiro Yamada's avatar Masahiro Yamada Committed by Tom Rini

Makefile: support descending down to subdirectories

This patch tweaks scripts/Makefile.build to allow
the build system to descend into subdirectories like Kbuild.

To use this feature, use "obj-y += foo/" syntax.

Example:
    obj-$(CONFIG_FOO) += foo/
Signed-off-by: default avatarMasahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
parent 4810400e
......@@ -19,6 +19,11 @@ obj-y := $(sort $(obj-y))
extra-y := $(sort $(extra-y))
lib-y := $(sort $(lib-y))
subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
obj-y := $(patsubst %/, %/built-in.o, $(obj-y))
subdir-obj-y := $(filter %/built-in.o, $(obj-y))
subdir-obj-y := $(addprefix $(obj),$(subdir-obj-y))
SRCS += $(COBJS:.o=.c) $(SOBJS:.o=.S) \
$(wildcard $(obj-y:.o=.c) $(obj-y:.o=.S) $(lib-y:.o=.c) $(lib-y:.o=.S) $(extra-y:.o=.c) $(extra-y:.o=.S))
OBJS := $(addprefix $(obj),$(COBJS) $(SOBJS) $(obj-y))
......@@ -37,6 +42,14 @@ $(LIBGCC): $(obj).depend $(LGOBJS)
$(call cmd_link_o_target, $(LGOBJS))
endif
ifneq ($(subdir-obj-y),)
# Descending
$(subdir-obj-y): $(subdir-y)
$(subdir-y): FORCE
$(MAKE) -C $@ -f $(TOPDIR)/scripts/Makefile.build
endif
#########################################################################
# defines $(obj).depend target
......@@ -46,3 +59,5 @@ include $(TOPDIR)/rules.mk
sinclude $(obj).depend
#########################################################################
.PHONY: FORCE
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