u-boot/scripts/Makefile.autoconf
Masahiro Yamada ffe29ebc07 kbuild: sync top Makefile with Linux 3.18-rc1
Since Linux 3.15, relative path feature and related fixes,
cleanups have been merged to the top Makefile.

The relative path feature looks stable enough, so let's import it
to U-Boot along with various cleanups.

Commits imported from Linux (some need adjustment) are:

[1] commit 7e1c04779efd by Michal Marek
  kbuild: Use relative path for $(objtree)

[2] commit 890676c65d69 by Michal Marek
  kbuild: Use relative path when building in the source tree

[3] commit 9da0763bdd82 by Michal Marek
  kbuild: Use relative path when building in a subdir of the source tree

[4] commit c2e28dc975ea by Michal Marek
  kbuild: Print the name of the build directory

[5] commit 066b7ed95580 by Michal Marek
  kbuild: Do not print the build directory with make -s

[6] commit 3f1d9a6cec01 by Michal Marek
  kbuild: make -s should be used with kernelrelease/kernelversion/image_name

[7] commit 7ff525712acf by Masahiro Yamada
  kbuild: fake the "Entering directory ..." message more simply

[8] commit 745a254322c8 by Masahiro Yamada
  kbuild: use $(Q) for sub-make target

[9] commit aa55c8e2f7a3 by Masahiro Yamada
  kbuild: handle C=... and M=... after entering into build directory

[10] commit ab7474ea5361 by Borislav Petkov
  Kbuild: Ignore GREP_OPTIONS env variable

To use relative path feature, tools/Makefile and scripts/Makefile.autoconf
must be tweaked.

Signed-off-by: Michal Marek <mmarek@suse.cz>
Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
2014-11-07 16:27:06 -05:00

102 lines
3.2 KiB
Makefile

# This helper makefile is used for creating
# - symbolic links (arch/$ARCH/include/asm/arch
# - include/autoconf.mk, {spl,tpl}/include/autoconf.mk
# - include/config.h
#
# When our migration to Kconfig is done
# (= When we move all CONFIGs from header files to Kconfig)
# this makefile can be deleted.
# obj is "include" or "spl/include" or "tpl/include"
# for non-SPL, SPL, TPL, respectively
include $(obj)/config/auto.conf
include scripts/Kbuild.include
# Need to define CC and CPP again here in case the top Makefile did not
# include config.mk. Some architectures expect CROSS_COMPILE to be defined
# in arch/$(ARCH)/config.mk
CC = $(CROSS_COMPILE)gcc
CPP = $(CC) -E
include config.mk
UBOOTINCLUDE := \
-I$(obj) \
-Iinclude \
$(if $(KBUILD_SRC), -I$(srctree)/include) \
-I$(srctree)/arch/$(ARCH)/include \
-include $(srctree)/include/linux/kconfig.h
c_flags := $(KBUILD_CFLAGS) $(KBUILD_CPPFLAGS) $(PLATFORM_CPPFLAGS) \
$(UBOOTINCLUDE) $(NOSTDINC_FLAGS)
quiet_cmd_autoconf_dep = GEN $@
cmd_autoconf_dep = $(CC) -x c -DDO_DEPS_ONLY -M -MP $(c_flags) \
-MQ include/config/auto.conf $(srctree)/include/common.h > $@ || { \
rm $@; false; \
}
include/autoconf.mk.dep: FORCE
$(call cmd,autoconf_dep)
# We are migrating from board headers to Kconfig little by little.
# In the interim, we use both of
# - include/config/auto.conf (generated by Kconfig)
# - include/autoconf.mk (used in the U-Boot conventional configuration)
# The following rule creates autoconf.mk
# include/config/auto.conf is grepped in order to avoid duplication of the
# same CONFIG macros
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 | \
while read line; do \
if ! grep -q "$${line%=*}=" $(obj)/config/auto.conf; then \
echo "$$line"; \
fi \
done > $@; \
rm $@.tmp; \
} || { \
rm $@.tmp; false; \
}
$(obj)/autoconf.mk: FORCE
$(call cmd,autoconf)
include/autoconf.mk include/autoconf.mk.dep: include/config.h
# include/config.h
# Prior to Kconfig, it was generated by mkconfig. Now it is created here.
define filechk_config_h
(echo "/* Automatically generated - do not edit */"; \
for i in $$(echo $(CONFIG_SYS_EXTRA_OPTIONS) | sed 's/,/ /g'); do \
echo \#define CONFIG_$$i \
| sed '/=/ {s/=/ /;q; } ; { s/$$/ 1/; }'; \
done; \
echo \#define CONFIG_BOARDDIR board/$(if $(VENDOR),$(VENDOR)/)$(BOARD);\
echo \#include \<config_defaults.h\>; \
echo \#include \<configs/$(CONFIG_SYS_CONFIG_NAME).h\>; \
echo \#include \<asm/config.h\>; \
echo \#include \<config_fallbacks.h\>; \
echo \#include \<config_uncmd_spl.h\>; )
endef
include/config.h: scripts/Makefile.autoconf create_symlink FORCE
$(call filechk,config_h)
# symbolic links
PHONY += create_symlink
create_symlink:
ifneq ($(KBUILD_SRC),)
$(Q)mkdir -p include/asm
$(Q)ln -fsn $(KBUILD_SRC)/arch/$(ARCH)/include/asm/arch-$(if $(SOC),$(SOC),$(CPU)) \
include/asm/arch
else
$(Q)ln -fsn arch-$(if $(SOC),$(SOC),$(CPU)) \
arch/$(ARCH)/include/asm/arch
endif
PHONY += FORCE
FORCE:
.PHONY: $(PHONY)