dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-09-01 16:52:14 +02:00
Code Issues Packages Projects Releases Wiki Activity

Makefile: prepare for using Kbuild-style Makefile

Browse Source 
Every makefile in sub directories has common lines
at the top and the bottom.
This commit pushes the common parts into script/Makefile.build.

Going forward sub-makefiles only need to describe this part:

    COBJS := ...
    COBJS += ...
    SOBJS := ...

But using obj-y is preferable to prepare for switching to Kbuild.

The conventional (non-Kbuild) Makefile style is still supported.
This is achieved by greping the Makefile before entering into it.
U-Boot conventional sub makefiles always include some other makefiles.
So the build system searches a line beginning with "include" keyword
in the makefile in order to distinguish which style it is.
If the Makefile include a "include" line, we assume it is a conventional
U-Boot style. Otherwise, it is treated as a Kbuild-style makefile.

With this tweak, we can switch sub-makefiles
from U-Boot style to Kbuild style little by little.

obj-y := foo/
syntax (descending into the sub directory) is not supportd yet.
It will be implemented in the upcomming commit.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@ti.com>
This commit is contained in:
Masahiro Yamada
2013-10-17 17:34:47 +09:00
committed by Tom Rini
parent 9d33fb4a5c
commit ce28d7ac6d
3 changed files with 99 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

48
scripts/Makefile.build Normal file
View File

@@ -0,0 +1,48 @@
# our default target
.PHONY: all
all:
include $(TOPDIR)/config.mk
LIB := $(obj)built-in.o
LIBGCC = $(obj)libgcc.o
SRCS :=
include Makefile
# Backward compatible: obj-y is preferable
COBJS := $(sort $(COBJS) $(COBJS-y))
SOBJS := $(sort $(SOBJS) $(SOBJS-y))
# Going forward use the following
obj-y := $(sort $(obj-y))
extra-y := $(sort $(extra-y))
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))
LGOBJS := $(addprefix $(obj),$(sort $(GLSOBJS) $(GLCOBJS)) $(lib-y))
all: $(LIB) $(addprefix $(obj),$(extra-y))
$(LIB): $(obj).depend $(OBJS)
$(call cmd_link_o_target, $(OBJS))
ifneq ($(strip $(lib-y)),)
all: $(LIBGCC)
$(LIBGCC): $(obj).depend $(LGOBJS)
$(call cmd_link_o_target, $(LGOBJS))
endif
#########################################################################
# defines $(obj).depend target
include $(TOPDIR)/rules.mk
sinclude $(obj).depend
#########################################################################