kbuild: change out-of-tree build

[kernel/u-boot.git] / scripts / Makefile.build

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index f969ec5..52a44ff 100644 (file)
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -2,47 +2,126 @@
 .PHONY: all
 all:
 
-include $(TOPDIR)/config.mk
+ifeq ($(CONFIG_TPL_BUILD),y)
+  src := $(patsubst tpl/%,%,$(obj))
+else
+  ifeq ($(CONFIG_SPL_BUILD),y)
+    src := $(patsubst spl/%,%,$(obj))
+  else
+    src := $(obj)
+  endif
+endif
+
+include $(srctree)/scripts/Kbuild.include
+include $(srctree)/config.mk
 
-LIB := $(obj)built-in.o
-LIBGCC = $(obj)libgcc.o
+# variable LIB is used in examples/standalone/Makefile
+__LIB := $(obj)/built-in.o
+LIBGCC = $(obj)/libgcc.o
 SRCS :=
+subdir-y :=
+obj-dirs :=
 
-include Makefile
+kbuild-dir := $(if $(filter /%,$(src)),$(src),$(srctree)/$(src))
+include $(kbuild-dir)/Makefile
 
-# Backward compatible: obj-y is preferable
-COBJS := $(sort $(COBJS) $(COBJS-y))
-SOBJS := $(sort $(SOBJS) $(SOBJS-y))
+# Do not include host rules unless needed
+ifneq ($(hostprogs-y)$(hostprogs-m),)
+include $(SRCTREE)/scripts/Makefile.host.tmp
+endif
 
 # Going forward use the following
 obj-y := $(sort $(obj-y))
 extra-y := $(sort $(extra-y))
+always := $(sort $(always))
 lib-y := $(sort $(lib-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))
+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   += $(obj-y:.o=.c) $(obj-y:.o=.S) $(lib-y:.o=.c) \
+       $(lib-y:.o=.S) $(extra-y:.o=.c) $(extra-y:.o=.S)
+
+SRCS := $(addprefix $(if $(KBUILD_SRC),$(srctree)/$(src)/,$(src)/),$(SRCS))
+SRCS := $(wildcard $(SRCS))
+
+OBJS   := $(addprefix $(obj)/,$(obj-y))
+
+# $(obj-dirs) is a list of directories that contain object files
+
+obj-dirs += $(dir $(OBJS))
+
+_dummy := $(shell [ -d $(obj) ] || mkdir -p $(obj))
+
+# Create directories for object files if directory does not exist
+# Needed when obj-y := dir/file.o syntax is used
+_dummy := $(foreach d,$(obj-dirs), $(shell [ -d $(d) ] || mkdir -p $(d)))
 
-LGOBJS := $(addprefix $(obj),$(sort $(GLSOBJS) $(GLCOBJS)) $(lib-y))
+LGOBJS := $(addprefix $(obj)/,$(sort $(lib-y)))
 
-all: $(LIB) $(addprefix $(obj),$(extra-y))
+all: $(__LIB) $(addprefix $(obj)/,$(extra-y) $(always)) $(subdir-y)
 
-$(LIB):        $(obj).depend $(OBJS)
+$(__LIB):      $(obj)/.depend $(OBJS)
        $(call cmd_link_o_target, $(OBJS))
 
 ifneq ($(strip $(lib-y)),)
 all: $(LIBGCC)
 
-$(LIBGCC): $(obj).depend $(LGOBJS)
+$(LIBGCC): $(obj)/.depend $(LGOBJS)
        $(call cmd_link_o_target, $(LGOBJS))
 endif
 
+ifneq ($(subdir-obj-y),)
+# Descending
+$(subdir-obj-y): $(subdir-y)
+endif
+
+ifneq ($(subdir-y),)
+$(subdir-y): FORCE
+       $(MAKE) $(build)=$(obj)/$@
+endif
+
+#########################################################################
+
+# Allow boards to use custom optimize flags on a per dir/file basis
+ALL_AFLAGS = $(AFLAGS) $(AFLAGS_$(BCURDIR)/$(@F)) $(AFLAGS_$(BCURDIR))
+ALL_CFLAGS = $(CFLAGS) $(CFLAGS_$(BCURDIR)/$(@F)) $(CFLAGS_$(BCURDIR))
+EXTRA_CPPFLAGS = $(CPPFLAGS_$(BCURDIR)/$(@F)) $(CPPFLAGS_$(BCURDIR))
+ALL_CFLAGS += $(EXTRA_CPPFLAGS)
+
+# The _DEP version uses the $< file target (for dependency generation)
+# See rules.mk
+EXTRA_CPPFLAGS_DEP = $(CPPFLAGS_$(BCURDIR)/$(addsuffix .o,$(basename $<))) \
+               $(CPPFLAGS_$(BCURDIR))
+$(obj)/%.s:    $(src)/%.S
+       $(CPP) $(ALL_AFLAGS) -o $@ $<
+$(obj)/%.o:    $(src)/%.S
+       $(CC)  $(ALL_AFLAGS) -o $@ $< -c
+$(obj)/%.o:    $(src)/%.c
+ifneq ($(CHECKSRC),0)
+       $(CHECK) $(CHECKFLAGS) $(ALL_CFLAGS) $<
+endif
+       $(CC)  $(ALL_CFLAGS) -o $@ $< -c
+$(obj)/%.i:    $(src)/%.c
+       $(CPP) $(ALL_CFLAGS) -o $@ $< -c
+$(obj)/%.s:    $(src)/%.c
+       $(CC)  $(ALL_CFLAGS) -o $@ $< -c -S
+
+# If the list of objects to link is empty, just create an empty built-in.o
+cmd_link_o_target = $(if $(strip $1),\
+                     $(LD) $(LDFLAGS) -r -o $@ $1,\
+                     rm -f $@; $(AR) rcs $@ )
+
 #########################################################################
 
-# defines $(obj).depend target
+# defines $(obj)/.depend target
 
 include $(TOPDIR)/rules.mk
 
-sinclude $(obj).depend
+sinclude $(obj)/.depend
 
 #########################################################################
+
+.PHONY: FORCE