#
# Copyright (C) 2006-2007 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(INCLUDE_DIR)/host.mk
include $(INCLUDE_DIR)/prereq.mk
ifneq ($(DUMP),1)
all: compile
endif
export QUILT=1
STAMP_PREPARED:=$(LINUX_DIR)/.prepared
STAMP_CONFIGURED:=$(LINUX_DIR)/.configured
include $(INCLUDE_DIR)/download.mk
include $(INCLUDE_DIR)/quilt.mk
include $(INCLUDE_DIR)/kernel-defaults.mk
define Kernel/Prepare
$(call Kernel/Prepare/Default)
endef
define Kernel/Configure
$(call Kernel/Configure/Default)
endef
define Kernel/CompileModules
$(call Kernel/CompileModules/Default)
endef
define Kernel/CompileImage
$(call Kernel/CompileImage/Default)
$(call Kernel/CompileImage/Initramfs)
endef
define Kernel/Clean
$(call Kernel/Clean/Default)
endef
define Download/kernel
URL:=$(LINUX_SITE)
FILE:=$(LINUX_SOURCE)
MD5SUM:=$(LINUX_KERNEL_MD5SUM)
endef
ifdef CONFIG_COLLECT_KERNEL_DEBUG
define Kernel/CollectDebug
rm -rf $(KERNEL_BUILD_DIR)/debug
mkdir -p $(KERNEL_BUILD_DIR)/debug/modules
$(CP) $(LINUX_DIR)/vmlinux $(KERNEL_BUILD_DIR)/debug/
-$(CP) \
$(STAGING_DIR_ROOT)/lib/modules/$(LINUX_VERSION)/* \
$(KERNEL_BUILD_DIR)/debug/modules/
$(FIND) $(KERNEL_BUILD_DIR)/debug -type f | $(XARGS) $(KERNEL_CROSS)strip --only-keep-debug
$(TAR) c -C $(KERNEL_BUILD_DIR) debug | bzip2 -c -9 > $(BIN_DIR)/kernel-debug.tar.bz2
endef
endif
define BuildKernel
$(if $(QUILT),$(Build/Quilt))
$(if $(LINUX_SITE),$(call Download,kernel))
.NOTPARALLEL:
$(STAMP_PREPARED): $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
-rm -rf $(KERNEL_BUILD_DIR)
-mkdir -p $(KERNEL_BUILD_DIR)
$(Kernel/Prepare)
touch $$@
$(KERNEL_BUILD_DIR)/symtab.h: FORCE
rm -f $(KERNEL_BUILD_DIR)/symtab.h
touch $(KERNEL_BUILD_DIR)/symtab.h
+$(MAKE) $(KERNEL_MAKEOPTS) vmlinux
find $(LINUX_DIR) $(STAGING_DIR_ROOT)/lib/modules -name \*.ko | \
xargs $(TARGET_CROSS)nm | \
awk '$$$$1 == "U" { print $$$$2 } ' | \
sort -u > $(KERNEL_BUILD_DIR)/mod_symtab.txt
$(TARGET_CROSS)nm -n $(LINUX_DIR)/vmlinux.o | grep ' [rR] __ksymtab' | sed -e 's,........ [rR] __ksymtab_,,' > $(KERNEL_BUILD_DIR)/kernel_symtab.txt
grep -Ff $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_include.txt
grep -Fvf $(KERNEL_BUILD_DIR)/mod_symtab.txt $(KERNEL_BUILD_DIR)/kernel_symtab.txt > $(KERNEL_BUILD_DIR)/sym_exclude.txt
( \
echo '#define SYMTAB_KEEP \'; \
cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
awk '{print "KEEP(*(___ksymtab+" $$$$1 ")) \\" }'; \
echo; \
echo '#define SYMTAB_KEEP_GPL \'; \
cat $(KERNEL_BUILD_DIR)/sym_include.txt | \
awk '{print "KEEP(*(___ksymtab_gpl+" $$$$1 ")) \\" }'; \
echo; \
echo '#define SYMTAB_DISCARD \'; \
cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
awk '{print "*(___ksymtab+" $$$$1 ") \\" }'; \
echo; \
echo '#define SYMTAB_DISCARD_GPL \'; \
cat $(KERNEL_BUILD_DIR)/sym_exclude.txt | \
awk '{print "*(___ksymtab_gpl+" $$$$1 ") \\" }'; \
echo; \
) > $$@
$(STAMP_CONFIGURED): $(STAMP_PREPARED) $(LINUX_KCONFIG_LIST) $(TOPDIR)/.config
$(Kernel/Configure)
touch $$@
$(LINUX_DIR)/.modules: $(STAMP_CONFIGURED) $(LINUX_DIR)/.config FORCE
$(Kernel/CompileModules)
touch $$@
$(LINUX_DIR)/.image: $(STAMP_CONFIGURED) $(if $(CONFIG_STRIP_KERNEL_EXPORTS),$(KERNEL_BUILD_DIR)/symtab.h) FORCE
$(Kernel/CompileImage)
$(Kernel/CollectDebug)
touch $$@
mostlyclean: FORCE
$(Kernel/Clean)
define BuildKernel
endef
download: $(if $(LINUX_SITE),$(DL_DIR)/$(LINUX_SOURCE))
prepare: $(STAMP_CONFIGURED)
compile: $(LINUX_DIR)/.modules
$(MAKE) -C image compile TARGET_BUILD=
oldconfig menuconfig nconfig: $(STAMP_PREPARED) $(STAMP_CHECKED) FORCE
rm -f $(STAMP_CONFIGURED)
$(LINUX_RECONF_CMD) > $(LINUX_DIR)/.config
$(_SINGLE)$(MAKE) -C $(LINUX_DIR) $(KERNEL_MAKEOPTS) $$@
$(LINUX_RECONF_DIFF) $(LINUX_DIR)/.config > $(LINUX_RECONFIG_TARGET)
install: $(LINUX_DIR)/.image
+$(MAKE) -C image compile install TARGET_BUILD=
clean: FORCE
rm -rf $(KERNEL_BUILD_DIR)
image-prereq:
@+$(NO_TRACE_MAKE) -s -C image prereq TARGET_BUILD=
prereq: image-prereq
endef
