kbuild: change out-of-tree build

[people/ms/u-boot.git] / scripts / Makefile.build

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index e3354aaa3ff31f4d509342c7fa6fa046135379c7..52a44ff377734bf6d06c13ee412d87c5570e85e0 100644 (file)
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -2,64 +2,125 @@
 .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 $(kbuild-dir)/Makefile
+
+# Do not include host rules unless needed
+ifneq ($(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))
 
-subdir-y       := $(patsubst %/,%,$(filter %/, $(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))
+subdir-obj-y   := $(addprefix $(obj)/,$(subdir-obj-y))
 
-SRCS   += $(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 $(obj),$(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))
+
+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 $(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) -C $@ -f $(TOPDIR)/scripts/Makefile.build
+       $(MAKE) $(build)=$(obj)/$@
 endif
 
 #########################################################################
 
-# defines $(obj).depend target
+# 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
 
 include $(TOPDIR)/rules.mk
 
-sinclude $(obj).depend
+sinclude $(obj)/.depend
 
 #########################################################################