From caf4747f0c0703bcae0f90c8b4885964c2a142b3 Mon Sep 17 00:00:00 2001 From: Felix Fietkau Date: Wed, 6 Apr 2011 14:48:55 +0000 Subject: [PATCH] build: clean up handling of the kernel config - support kernel config overlays in env/ - allow overriding the target kernel config with CONFIG_TARGET=platform|subtarget|env SVN-Revision: 26498 --- include/kernel-build.mk | 11 +++---- include/kernel-defaults.mk | 2 +- include/target.mk | 62 +++++++++++++++++++++++++++++--------- 3 files changed, 53 insertions(+), 22 deletions(-) diff --git a/include/kernel-build.mk b/include/kernel-build.mk index 282dc9614f..432efd6ceb 100644 --- a/include/kernel-build.mk +++ b/include/kernel-build.mk @@ -89,7 +89,7 @@ define BuildKernel echo; \ ) > $$@ - $(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_CONFIG) $(GENERIC_LINUX_CONFIG) $(TOPDIR)/.config + $(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_KCONFIG_LIST) $(TOPDIR)/.config $(Kernel/Configure) touch $$@ @@ -114,13 +114,10 @@ define BuildKernel $(MAKE) -C image compile TARGET_BUILD= oldconfig menuconfig nconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE - [ -e "$(LINUX_CONFIG)" ] || touch "$(LINUX_CONFIG)" - $(LINUX_CONFCMD) > $(LINUX_DIR)/.config - touch $(LINUX_CONFIG) + rm -f $(STAMP_CONFIGURED) + $(LINUX_RECONF_CMD) > $(LINUX_DIR)/.config $(_SINGLE)$(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) $$@ - $(SCRIPT_DIR)/kconfig.pl '>' $(if $(LINUX_SUBCONFIG),'+' $(GENERIC_LINUX_CONFIG) $(LINUX_CONFIG),$(GENERIC_LINUX_CONFIG)) \ - $(LINUX_DIR)/.config > $(if $(LINUX_SUBCONFIG),$(LINUX_SUBCONFIG),$(LINUX_CONFIG)) - $(Kernel/Configure) + $(LINUX_RECONF_DIFF) $(LINUX_DIR)/.config > $(LINUX_RECONFIG_TARGET) install: $(LINUX_DIR)/.image +$(MAKE) -C image compile install TARGET_BUILD= diff --git a/include/kernel-defaults.mk b/include/kernel-defaults.mk index 9223e8413b..1bc829b901 100644 --- a/include/kernel-defaults.mk +++ b/include/kernel-defaults.mk @@ -76,7 +76,7 @@ ifeq ($(CONFIG_TARGET_ROOTFS_INITRAMFS),y) endif define Kernel/Configure/Default - $(LINUX_CONFCMD) > $(LINUX_DIR)/.config.target + $(LINUX_CONF_CMD) > $(LINUX_DIR)/.config.target # copy CONFIG_KERNEL_* settings over to .config.target awk '/^(#[[:space:]]+)?CONFIG_KERNEL/{sub("CONFIG_KERNEL_","CONFIG_");print}' $(TOPDIR)/.config >> $(LINUX_DIR)/.config.target echo "# CONFIG_KALLSYMS_EXTRA_PASS is not set" >> $(LINUX_DIR)/.config.target diff --git a/include/target.mk b/include/target.mk index e1f4dc6ca9..f673f95827 100644 --- a/include/target.mk +++ b/include/target.mk @@ -108,27 +108,61 @@ GENERIC_PLATFORM_DIR := $(TOPDIR)/target/linux/generic GENERIC_PATCH_DIR := $(GENERIC_PLATFORM_DIR)/patches$(if $(wildcard $(GENERIC_PLATFORM_DIR)/patches-$(KERNEL_PATCHVER)),-$(KERNEL_PATCHVER)) GENERIC_FILES_DIR := $(foreach dir,$(wildcard $(GENERIC_PLATFORM_DIR)/files $(GENERIC_PLATFORM_DIR)/files-$(KERNEL_PATCHVER)),"$(dir)") -GENERIC_LINUX_CONFIG?=$(firstword $(wildcard $(GENERIC_PLATFORM_DIR)/config-$(KERNEL_PATCHVER) $(GENERIC_PLATFORM_DIR)/config-default)) -LINUX_CONFIG?=$(firstword $(wildcard $(foreach subdir,$(PLATFORM_DIR) $(PLATFORM_SUBDIR),$(subdir)/config-$(KERNEL_PATCHVER) $(subdir)/config-default)) $(PLATFORM_DIR)/config-$(KERNEL_PATCHVER)) -LINUX_SUBCONFIG?=$(if $(SHARED_LINUX_CONFIG),,$(firstword $(wildcard $(PLATFORM_SUBDIR)/config-$(KERNEL_PATCHVER) $(PLATFORM_SUBDIR)/config-default))) -ifeq ($(LINUX_CONFIG),$(LINUX_SUBCONFIG)) - LINUX_SUBCONFIG:= +__config_name_list = $(1)/config-$(KERNEL_PATCHVER) $(1)/config-default +__config_list = $(firstword $(wildcard $(call __config_name_list,$(1)))) +find_kernel_config=$(if $(__config_list),$(__config_list),$(lastword $(__config_name_list))) + +GENERIC_LINUX_CONFIG:=$(call find_kernel_config,$(GENERIC_PLATFORM_DIR)) +LINUX_TARGET_CONFIG:=$(call find_kernel_config,$(PLATFORM_DIR)) +ifneq ($(PLATFORM_DIR),$(PLATFORM_SUBDIR)) + LINUX_SUBTARGET_CONFIG:=$(call find_kernel_config,$(PLATFORM_SUBDIR)) endif -LINUX_CONFCMD=$(if $(LINUX_CONFIG), \ - $(if $(GENERIC_LINUX_CONFIG),,$(error The generic kernel config for your kernel version is missing)) \ - $(if $(LINUX_CONFIG),,$(error The target kernel config for your kernel version is missing)) \ - $(SCRIPT_DIR)/kconfig.pl \ - + $(GENERIC_LINUX_CONFIG) \ - $(if $(LINUX_SUBCONFIG),+ $(LINUX_CONFIG) $(LINUX_SUBCONFIG),$(LINUX_CONFIG)), \ - true) + +# config file list used for compiling +LINUX_KCONFIG_LIST := $(wildcard $(GENERIC_LINUX_CONFIG) $(LINUX_TARGET_CONFIG) $(LINUX_SUBTARGET_CONFIG) $(TOPDIR)/env/kernel-config) + +# default config list for reconfiguring +# defaults to subtarget if subtarget exists and target does not +# defaults to target otherwise +ifeq ($(if $(wildcard $(LINUX_TARGET_CONFIG)),,$(if $(LINUX_SUBTARGET_CONFIG),1)),1) + LINUX_RECONFIG_LIST := $(wildcard $(GENERIC_LINUX_CONFIG) $(LINUX_TARGET_CONFIG) $(LINUX_SUBTARGET_CONFIG)) + LINUX_RECONFIG_TARGET := $(LINUX_SUBTARGET_CONFIG) +else + LINUX_RECONFIG_LIST := $(wildcard $(GENERIC_LINUX_CONFIG) $(LINUX_TARGET_CONFIG)) + LINUX_RECONFIG_TARGET := $(LINUX_TARGET_CONFIG) +endif + +# select the config file to be cahnged by kernel_menuconfig/kernel_oldconfig +ifeq ($(CONFIG_TARGET),platform) + LINUX_RECONFIG_LIST := $(wildcard $(GENERIC_LINUX_CONFIG) $(LINUX_TARGET_CONFIG)) + LINUX_RECONFIG_TARGET := $(LINUX_TARGET_CONFIG) +endif +ifeq ($(CONFIG_TARGET),subtarget) + ifeq ($(wildcard $(LINUX_SUBTARGET_CONFIG)),) + $(error Subtarget not available, cannot reconfigure) + else + LINUX_RECONFIG_LIST := $(wildcard $(GENERIC_LINUX_CONFIG) $(LINUX_TARGET_CONFIG) $(LINUX_SUBTARGET_CONFIG)) + LINUX_RECONFIG_TARGET := $(LINUX_SUBTARGET_CONFIG) + endif +endif +ifeq ($(CONFIG_TARGET),env) + LINUX_RECONFIG_LIST := $(LINUX_KCONFIG_LIST) + LINUX_RECONFIG_TARGET := $(TOPDIR)/env/kernel-config +endif + +__linux_confcmd = $(SCRIPT_DIR)/kconfig.pl $(2) $(patsubst %,+,$(wordlist 2,9999,$(1))) $(1) + +LINUX_CONF_CMD = $(call __linux_confcmd,$(LINUX_KCONFIG_LIST),) +LINUX_RECONF_CMD = $(call __linux_confcmd,$(LINUX_RECONFIG_LIST),) +LINUX_RECONF_DIFF = $(call __linux_confcmd,$(filter-out $(LINUX_RECONFIG_TARGET),$(LINUX_RECONFIG_LIST)),'>') ifeq ($(DUMP),1) BuildTarget=$(BuildTargets/DumpCurrent) ifneq ($(BOARD),) TMP_CONFIG:=$(TMP_DIR)/.kconfig-$(call target_conf,$(TARGETID)) - $(TMP_CONFIG): $(GENERIC_LINUX_CONFIG) $(LINUX_CONFIG) $(LINUX_SUBCONFIG) - $(LINUX_CONFCMD) > $@ || rm -f $@ + $(TMP_CONFIG): $(LINUX_KCONFIG_LIST) + $(LINUX_CONF_CMD) > $@ || rm -f $@ -include $(TMP_CONFIG) .SILENT: $(TMP_CONFIG) .PRECIOUS: $(TMP_CONFIG)