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authorMasahiro Yamada <yamada.m@jp.panasonic.com>2013-10-17 20:38:51 +0900
committerTom Rini <trini@ti.com>2013-10-31 13:26:44 -0400
commitac7e73532242ce350764d8aa8dcddcbd47c0fb71 (patch)
tree4869eb09b77ac759cb1425607b27131f44a9580d /scripts/Makefile.build
parent4810400ec963721f0488ba98128955176c1869e1 (diff)
downloadblackbird-obmc-uboot-ac7e73532242ce350764d8aa8dcddcbd47c0fb71.tar.gz
blackbird-obmc-uboot-ac7e73532242ce350764d8aa8dcddcbd47c0fb71.zip
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: Masahiro Yamada <yamada.m@jp.panasonic.com> Cc: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'scripts/Makefile.build')
-rw-r--r--scripts/Makefile.build15
1 files changed, 15 insertions, 0 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index f969ec55bd..2ef7341f37 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -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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