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kbuild: change the top Makefile to more Kbuild-ish structure

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This commit changes the top Makefile to handle various targets
nicely.
Make targets are divided into four categories:

 - mixed-targets
     We can call a configuration target and build targets
     at one command line like follows:
     $ make <board_name>_config u-boot

     They are handled one by one.

 - config targets
     <board_name>_config

 - no-dot-config-targets
     Targets we can run without board configuration such as
       clean, mrproper, distclean, TAGS, %docs, etc.

 - build targets
     The other target which need board configuration.

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
master
Masahiro Yamada 10 years ago committed by Tom Rini
parent 7390643f7b
commit 433b2f1e5a
1 changed files with 167 additions and 123 deletions
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  1. 290
      Makefile

290
Makefile
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@ -203,34 +203,6 @@ VENDOR=
#########################################################################
# The "tools" are needed early, so put this first
# Don't include stuff already done in $(LIBS)
# The "examples" conditionally depend on U-Boot (say, when USE_PRIVATE_LIBGCC
# is "yes"), so compile examples after U-Boot is compiled.
SUBDIR_TOOLS = tools
SUBDIRS = $(SUBDIR_TOOLS)
.PHONY : $(SUBDIRS) $(VERSION_FILE) $(TIMESTAMP_FILE)
ifeq (include/config.mk,$(wildcard include/config.mk))
# Include autoconf.mk before config.mk so that the config options are available
# to all top level build files. We need the dummy all: target to prevent the
# dependency target in autoconf.mk.dep from being the default.
all:
sinclude include/autoconf.mk.dep
sinclude include/autoconf.mk
SUBDIR_EXAMPLES-y := examples/standalone
SUBDIR_EXAMPLES-$(CONFIG_API) += examples/api
ifndef CONFIG_SANDBOX
SUBDIRS += $(SUBDIR_EXAMPLES-y)
endif
# load ARCH, BOARD, and CPU configuration
include include/config.mk
export ARCH CPU BOARD VENDOR SOC
# set default to nothing for native builds
ifeq ($(HOSTARCH),$(ARCH))
CROSS_COMPILE ?=
@ -377,15 +349,6 @@ CHECK = sparse
CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ \
-Wbitwise -Wno-return-void -D__CHECK_ENDIAN__ $(CF)
# Use UBOOTINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
UBOOTINCLUDE :=
ifneq ($(OBJTREE),$(SRCTREE))
UBOOTINCLUDE += -I$(OBJTREE)/include
endif
UBOOTINCLUDE += -I$(srctree)/include \
-I$(srctree)/arch/$(ARCH)/include
KBUILD_CPPFLAGS := -D__KERNEL__
KBUILD_CFLAGS := -Wall -Wstrict-prototypes \
@ -396,6 +359,7 @@ KBUILD_AFLAGS := -D__ASSEMBLY__
U_BOOT_VERSION = $(VERSION)$(if $(PATCHLEVEL),.$(PATCHLEVEL)$(if $(SUBLEVEL),.$(SUBLEVEL)))$(EXTRAVERSION)
export VERSION PATCHLEVEL SUBLEVEL U_BOOT_VERSION
export ARCH CPU BOARD VENDOR SOC
export CONFIG_SHELL HOSTCC HOSTCFLAGS HOSTLDFLAGS CROSS_COMPILE AS LD CC
export CPP AR NM LDR STRIP OBJCOPY OBJDUMP
export MAKE AWK
@ -428,65 +392,84 @@ scripts_basic:
# To avoid any implicit rule to kick in, define an empty command.
scripts/basic/%: scripts_basic ;
# To make sure we do not include .config for any of the *config targets
# catch them early, and hand them over to scripts/kconfig/Makefile
# It is allowed to specify more targets when calling make, including
# mixing *config targets and build targets.
# For example 'make oldconfig all'.
# Detect when mixed targets is specified, and make a second invocation
# of make so .config is not included in this case either (for *config).
no-dot-config-targets := clean clobber mrproper distclean \
cscope TAGS %tags help %docs check% coccicheck \
backup
config-targets := 0
mixed-targets := 0
dot-config := 1
ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),)
ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),)
dot-config := 0
endif
endif
KBUILD_CFLAGS += -Os #-fomit-frame-pointer
ifdef BUILD_TAG
KBUILD_CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
ifeq ($(KBUILD_EXTMOD),)
ifneq ($(filter config %config,$(MAKECMDGOALS)),)
config-targets := 1
ifneq ($(filter-out config %config,$(MAKECMDGOALS)),)
mixed-targets := 1
endif
endif
endif
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
ifeq ($(mixed-targets),1)
# ===========================================================================
# We're called with mixed targets (*config and build targets).
# Handle them one by one.
KBUILD_CFLAGS += -g
# $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
# option to the assembler.
KBUILD_AFLAGS += -g
%:: FORCE
$(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
CHECKFLAGS += $(NOSTDINC_FLAGS)
else
ifeq ($(config-targets),1)
# ===========================================================================
# *config targets only - make sure prerequisites are updated, and descend
# in scripts/kconfig to make the *config target
# Report stack usage if supported
KBUILD_CFLAGS += $(call cc-option,-fstack-usage)
# Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
# KBUILD_DEFCONFIG may point out an alternative default configuration
# used for 'make defconfig'
KBUILD_CFLAGS += $(call cc-option,-Wno-format-nonliteral)
%_config::
@$(MKCONFIG) -A $(@:_config=)
# turn jbsr into jsr for m68k
ifeq ($(ARCH),m68k)
ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
KBUILD_AFLAGS += -Wa,-gstabs,-S
endif
endif
else
# ===========================================================================
# Build targets only - this includes vmlinux, arch specific targets, clean
# targets and others. In general all targets except *config targets.
# load other configuration
include $(TOPDIR)/config.mk
# load ARCH, BOARD, and CPU configuration
-include include/config.mk
ifneq ($(CONFIG_SYS_TEXT_BASE),)
KBUILD_CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
endif
ifeq ($(dot-config),1)
# Read in config
-include include/autoconf.mk
-include include/autoconf.mk.dep
export CONFIG_SYS_TEXT_BASE
# load other configuration
include $(srctree)/config.mk
LDFLAGS_u-boot += -T u-boot.lds $(LDFLAGS_FINAL)
ifneq ($(CONFIG_SYS_TEXT_BASE),)
LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
ifeq ($(wildcard include/config.mk),)
$(error "System not configured - see README")
endif
# Targets which don't build the source code
NON_BUILD_TARGETS = backup clean clobber distclean mrproper unconfig %_config
# Only do the generic board check when actually building, not configuring
ifeq ($(filter $(NON_BUILD_TARGETS),$(MAKECMDGOALS)),)
ifeq ($(__HAVE_ARCH_GENERIC_BOARD),)
ifneq ($(CONFIG_SYS_GENERIC_BOARD),)
CHECK_GENERIC_BOARD = $(error Your architecture does not support generic board. \
$(error Your architecture does not support generic board. \
Please undefined CONFIG_SYS_GENERIC_BOARD in your board config file)
endif
endif
endif
# FIX ME
cpp_flags := $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
# If board code explicitly specified LDSCRIPT or CONFIG_SYS_LDSCRIPT, use
# that (or fail if absent). Otherwise, search for a linker script in a
@ -526,6 +509,73 @@ $(error could not find linker script)
endif
endif
else
endif # $(dot-config)
KBUILD_CFLAGS += -Os #-fomit-frame-pointer
ifdef BUILD_TAG
KBUILD_CFLAGS += -DBUILD_TAG='"$(BUILD_TAG)"'
endif
KBUILD_CFLAGS += $(call cc-option,-fno-stack-protector)
KBUILD_CFLAGS += -g
# $(KBUILD_AFLAGS) sets -g, which causes gcc to pass a suitable -g<format>
# option to the assembler.
KBUILD_AFLAGS += -g
# Report stack usage if supported
KBUILD_CFLAGS += $(call cc-option,-fstack-usage)
KBUILD_CFLAGS += $(call cc-option,-Wno-format-nonliteral)
# turn jbsr into jsr for m68k
ifeq ($(ARCH),m68k)
ifeq ($(findstring 3.4,$(shell $(CC) --version)),3.4)
KBUILD_AFLAGS += -Wa,-gstabs,-S
endif
endif
ifneq ($(CONFIG_SYS_TEXT_BASE),)
KBUILD_CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
endif
export CONFIG_SYS_TEXT_BASE
# Use UBOOTINCLUDE when you must reference the include/ directory.
# Needed to be compatible with the O= option
UBOOTINCLUDE :=
ifneq ($(OBJTREE),$(SRCTREE))
UBOOTINCLUDE += -I$(OBJTREE)/include
endif
UBOOTINCLUDE += -I$(srctree)/include \
-I$(srctree)/arch/$(ARCH)/include
NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include)
CHECKFLAGS += $(NOSTDINC_FLAGS)
# FIX ME
cpp_flags := $(KBUILD_CPPFLAGS) $(CPPFLAGS) $(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
c_flags := $(KBUILD_CFLAGS) $(cpp_flags)
# The "tools" are needed early, so put this first
# Don't include stuff already done in $(LIBS)
# The "examples" conditionally depend on U-Boot (say, when USE_PRIVATE_LIBGCC
# is "yes"), so compile examples after U-Boot is compiled.
SUBDIR_TOOLS = tools
SUBDIRS = $(SUBDIR_TOOLS)
.PHONY : $(SUBDIRS) $(VERSION_FILE) $(TIMESTAMP_FILE)
SUBDIR_EXAMPLES-y := examples/standalone
SUBDIR_EXAMPLES-$(CONFIG_API) += examples/api
ifndef CONFIG_SANDBOX
SUBDIRS += $(SUBDIR_EXAMPLES-y)
endif
#########################################################################
# U-Boot objects....order is important (i.e. start must be first)
@ -675,6 +725,11 @@ endif
endif
endif
LDFLAGS_u-boot += -T u-boot.lds $(LDFLAGS_FINAL)
ifneq ($(CONFIG_SYS_TEXT_BASE),)
LDFLAGS_u-boot += -Ttext $(CONFIG_SYS_TEXT_BASE)
endif
all: $(ALL-y) $(SUBDIR_EXAMPLES-y)
u-boot.dtb: checkdtc u-boot
@ -867,11 +922,34 @@ $(OBJS):
$(LIBS): depend $(SUBDIR_TOOLS) scripts_basic
$(Q)$(MAKE) $(build)=$(patsubst %/,%,$(dir $@))
$(SUBDIRS): depend scripts_basic
$(SUBDIRS): scripts_basic $(TIMESTAMP_FILE) $(VERSION_FILE)
$(Q)$(MAKE) $(build)=$@
$(SUBDIR_EXAMPLES-y): u-boot
#
# Auto-generate the autoconf.mk file (which is included by all makefiles)
#
# This target actually generates 2 files; autoconf.mk and autoconf.mk.dep.
# the dep file is only include in this top level makefile to determine when
# to regenerate the autoconf.mk file.
quiet_cmd_autoconf_dep = GEN $@
cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M $(c_flags) \
-MQ include/autoconf.mk $(srctree)/include/common.h > $@ || rm $@
include/autoconf.mk.dep: include/config.h include/common.h
$(call cmd,autoconf_dep)
quiet_cmd_autoconf = GEN $@
cmd_autoconf = \
$(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
rm $@.tmp
include/autoconf.mk: include/config.h
$(call cmd,autoconf)
u-boot.lds: $(LDSCRIPT) depend
$(CPP) $(cpp_flags) $(LDPPFLAGS) -ansi -D__ASSEMBLY__ -P - <$< >$@
@ -948,29 +1026,6 @@ checkdtc:
false; \
fi
#
# Auto-generate the autoconf.mk file (which is included by all makefiles)
#
# This target actually generates 2 files; autoconf.mk and autoconf.mk.dep.
# the dep file is only include in this top level makefile to determine when
# to regenerate the autoconf.mk file.
quiet_cmd_autoconf_dep = GEN $@
cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M $(c_flags) \
-MQ include/autoconf.mk $(srctree)/include/common.h > $@ || rm $@
include/autoconf.mk.dep: include/config.h include/common.h
$(call cmd,autoconf_dep)
quiet_cmd_autoconf = GEN $@
cmd_autoconf = \
$(CPP) $(c_flags) -DDO_DEPS_ONLY -dM $(srctree)/include/common.h > $@.tmp && \
sed -n -f $(srctree)/tools/scripts/define2mk.sed $@.tmp > $@; \
rm $@.tmp
include/autoconf.mk: include/config.h
$(call cmd,autoconf)
quiet_cmd_offsets = GEN $@
cmd_offsets = $(srctree)/tools/scripts/make-asm-offsets $< $@
@ -1003,17 +1058,6 @@ $(CPUDIR)/$(SOC)/asm-offsets.s: include/config.h
$(call cmd,soc_asm-offsets.s)
#########################################################################
else # !config.mk
all u-boot.hex u-boot.srec u-boot.bin \
u-boot.img u-boot.dis u-boot \
$(filter-out tools,$(SUBDIRS)) \
depend dep tags ctags etags cscope System.map:
@echo "System not configured - see README" >&2
@ exit 1
tools: $(VERSION_FILE) $(TIMESTAMP_FILE)
$(MAKE) $(build)=$@ all
endif # config.mk
# ARM relocations should all be R_ARM_RELATIVE (32-bit) or
# R_AARCH64_RELATIVE (64-bit).
@ -1066,15 +1110,6 @@ include/license.h: tools/bin2header COPYING
cat COPYING | gzip -9 -c | ./tools/bin2header license_gzip > include/license.h
#########################################################################
unconfig:
@rm -f include/config.h include/config.mk \
board/*/config.tmp board/*/*/config.tmp \
include/autoconf.mk include/autoconf.mk.dep \
include/spl-autoconf.mk \
include/tpl-autoconf.mk
%_config:: unconfig
@$(MKCONFIG) -A $(@:_config=)
#########################################################################
@ -1151,8 +1186,14 @@ clobber: clean
@rm -f dts/*.tmp
@rm -f $(addprefix spl/, u-boot-spl.ais, u-boot-spl-pad.ais)
mrproper \
distclean: clobber unconfig
mrproper: clobber
@rm -f include/config.h include/config.mk \
board/*/config.tmp board/*/*/config.tmp \
include/autoconf.mk include/autoconf.mk.dep \
include/spl-autoconf.mk \
include/tpl-autoconf.mk
distclean: mrproper
ifneq ($(OBJTREE),$(SRCTREE))
rm -rf *
endif
@ -1163,6 +1204,9 @@ backup:
#########################################################################
endif #ifeq ($(config-targets),1)
endif #ifeq ($(mixed-targets),1)
endif # skip-makefile
PHONY += FORCE

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