path: root/Makefile
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authorGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2010-08-22 07:27:09 +0200
committerGravatar Thomas Petazzoni <thomas.petazzoni@free-electrons.com>2010-09-01 14:22:28 +0200
commit0b36880085f0c65286877853caccf0bde2dd7f0b (patch)
tree3c98abc4dc8545c9dd494d3a5b23301d61b8cdae /Makefile
parente1b1a18ab63ae3ef4eeb7f7cb4406a9cfbb12035 (diff)
Ensure that all config-related files are generated before the build
The previous commit has removed calls to conf_write_autoconf(), which is the function that generates the KCONFIG_AUTOCONF, KCONFIG_AUTOHEADER, KCONFIG_TRISTATE files and the split config (with one file per config item). Therefore, those things were not generated anymore before the build. In order to get them generated before the build, we use the same mechanism as the kernel: run a silentoldconfig when the .config file is newer than the KCONFIG_AUTOCONF file. In Buildroot, all those elements are not really used today, except the split config which is used a little bit in the toolchain build, in a try to make sure the toolchain gets rebuilt properly when the configuration changes. It does not seem that this work has been completed. However, as we want to keep the same behaviour as previously, we have to generate all those elements before starting the build. Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Diffstat (limited to 'Makefile')
1 files changed, 12 insertions, 7 deletions
diff --git a/Makefile b/Makefile
index c897db76c5..9cc3c7a186 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,7 @@ CONFIG=package/config
DATE:=$(shell date +%Y%m%d)
noconfig_targets:=menuconfig nconfig gconfig xconfig config oldconfig randconfig \
- defconfig %_defconfig savedefconfig allyesconfig allnoconfig release \
+ defconfig %_defconfig savedefconfig allyesconfig allnoconfig silentoldconfig release \
randpackageconfig allyespackageconfig allnopackageconfig \
source-check help
@@ -322,17 +322,17 @@ TARGETS_ALL:=$(patsubst %,__real_tgt_%,$(TARGETS))
# all targets depend on the crosscompiler and it's prerequisites
$(TARGETS_ALL): __real_tgt_%: $(BASE_TARGETS) %
-$(BR2_DEPENDS_DIR): $(CONFIG_DIR)/.config
-# rm -rf $@
-# mkdir -p $(@D)
-# cp -dpRf $(CONFIG)/buildroot-config $@
-world: dependencies dirs $(BASE_TARGETS) $(TARGETS_ALL)
+$(BUILD_DIR)/buildroot-config/auto.conf: $(CONFIG_DIR)/.config
+ $(MAKE) $(EXTRAMAKEARGS) silentoldconfig
+prepare: $(BUILD_DIR)/buildroot-config/auto.conf
+world: prepare dependencies dirs $(BASE_TARGETS) $(TARGETS_ALL)
.PHONY: all world dirs clean distclean source \
@@ -468,6 +468,7 @@ $(BUILD_DIR)/buildroot-config/%onf:
KCONFIG_AUTOCONFIG=$(BUILD_DIR)/buildroot-config/auto.conf \
KCONFIG_AUTOHEADER=$(BUILD_DIR)/buildroot-config/autoconf.h \
+ KCONFIG_TRISTATE=$(BUILD_DIR)/buildroot-config/tristate.config \
xconfig: $(BUILD_DIR)/buildroot-config/qconf
@@ -539,6 +540,10 @@ allnopackageconfig: $(BUILD_DIR)/buildroot-config/conf
$< --allnoconfig $(CONFIG_CONFIG_IN)
@rm -f $(CONFIG_DIR)/.config.nopkg
+silentoldconfig: $(BUILD_DIR)/buildroot-config/conf
+ @mkdir -p $(BUILD_DIR)/buildroot-config
+ $(COMMON_CONFIG_ENV) $< --silentoldconfig $(CONFIG_CONFIG_IN)
defconfig: $(BUILD_DIR)/buildroot-config/conf
@mkdir -p $(BUILD_DIR)/buildroot-config