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#############################################################
#
# Linux kernel targets
#
# Note: If you have any patches to apply, create the directory
# sources/kernel-patches and put your patches in there and number
# them in the order you wish to apply them... i.e.
#
# sources/kernel-patches/001-my-special-stuff.bz2
# sources/kernel-patches/003-gcc-Os.bz2
# sources/kernel-patches/004_no-warnings.bz2
# sources/kernel-patches/030-lowlatency-mini.bz2
# sources/kernel-patches/031-lowlatency-fixes-5.bz2
# sources/kernel-patches/099-shutup.bz2
# etc...
#
# these patches will all be applied by the patch-kernel.sh
# script (which will also abort the build if it finds rejects)
# -Erik
#
#############################################################
ifneq ($(filter $(TARGETS),linux),)
# Version of Linux to download and then apply patches to
DOWNLOAD_LINUX_VERSION=2.4.21
# Version of Linux AFTER patches
LINUX_VERSION=2.4.21-erik
LINUX_FORMAT=bzImage
LINUX_BINLOC=arch/$(ARCH)/boot/$(LINUX_FORMAT)
#LINUX_FORMAT=zImage
#LINUX_BINLOC=arch/ppc/boot/images/zImage.prep
LINUX_DIR=$(BUILD_DIR)/linux-$(LINUX_VERSION)
LINUX_SOURCE=linux-$(DOWNLOAD_LINUX_VERSION).tar.bz2
LINUX_SITE=ftp://ftp.kernel.org/pub/linux/kernel/v2.4
LINUX_KCONFIG=$(SOURCE_DIR)/linux.config
LINUX_KERNEL=$(BUILD_DIR)/buildroot-kernel
# Used by pcmcia-cs and others
LINUX_SOURCE_DIR=$(LINUX_DIR)
$(DL_DIR)/$(LINUX_SOURCE):
$(WGET) -P $(DL_DIR) $(LINUX_SITE)/$(LINUX_SOURCE)
$(LINUX_DIR)/.unpacked: $(DL_DIR)/$(LINUX_SOURCE)
rm -rf $(LINUX_DIR)
bzcat $(DL_DIR)/$(LINUX_SOURCE) | tar -C $(BUILD_DIR) -xvf -
ifneq ($(DOWNLOAD_LINUX_VERSION),$(LINUX_VERSION))
# Rename the dir from the downloaded version to the AFTER patch version
mv -f $(BUILD_DIR)/linux-$(DOWNLOAD_LINUX_VERSION) $(BUILD_DIR)/linux-$(LINUX_VERSION)
endif
mkdir -p $(SOURCE_DIR)/kernel-patches
$(SOURCE_DIR)/patch-kernel.sh $(LINUX_DIR) $(SOURCE_DIR)/kernel-patches
-(cd $(BUILD_DIR); ln -sf $(LINUX_DIR) linux)
touch $(LINUX_DIR)/.unpacked
$(LINUX_KCONFIG):
@if [ ! -f "$(LINUX_KCONFIG)" ] ; then \
echo ""; \
echo "You should create a .config for your kernel"; \
echo "and install it as $(LINUX_KCONFIG)"; \
echo ""; \
sleep 5; \
fi;
$(LINUX_DIR)/.configured $(BUILD_DIR)/linux/.configured: $(LINUX_DIR)/.unpacked $(LINUX_KCONFIG)
perl -i -p -e "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(KERNEL_CROSS),g;" $(LINUX_DIR)/Makefile
-cp $(LINUX_KCONFIG) $(LINUX_DIR)/.config
$(MAKE) -C $(LINUX_DIR) oldconfig include/linux/version.h
touch $(LINUX_DIR)/.configured
$(LINUX_DIR)/.depend_done: $(LINUX_DIR)/.configured
$(MAKE) -C $(LINUX_DIR) dep
touch $(LINUX_DIR)/.depend_done
$(LINUX_DIR)/$(LINUX_BINLOC): $(LINUX_DIR)/.depend_done
$(MAKE) -C $(LINUX_DIR) $(LINUX_FORMAT)
$(MAKE) -C $(LINUX_DIR) modules
$(LINUX_KERNEL): $(LINUX_DIR)/$(LINUX_BINLOC)
cp -fa $(LINUX_DIR)/$(LINUX_BINLOC) $(LINUX_KERNEL)
touch -c $(LINUX_KERNEL)
$(TARGET_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep: $(LINUX_KERNEL)
rm -rf $(TARGET_DIR)/lib/modules
rm -f $(TARGET_DIR)/sbin/cardmgr
$(MAKE) -C $(LINUX_DIR) INSTALL_MOD_PATH=$(TARGET_DIR) modules_install
(cd $(TARGET_DIR)/lib/modules; ln -s $(LINUX_VERSION)/kernel/drivers .)
$(STAGING_DIR)/include/linux/version.h: $(LINUX_DIR)/.configured
mkdir -p $(STAGING_DIR)/include
tar -ch -C $(LINUX_DIR)/include -f - linux | tar -xf - -C $(STAGING_DIR)/include/
tar -ch -C $(LINUX_DIR)/include -f - asm | tar -xf - -C $(STAGING_DIR)/include/
linux: $(STAGING_DIR)/include/linux/version.h $(TARGET_DIR)/lib/modules/$(LINUX_VERSION)/modules.dep
# This has been renamed so we do _NOT_ by default run this on 'make clean'
linuxclean: clean
rm -f $(LINUX_KERNEL)
-$(MAKE) -C $(LINUX_DIR) clean
linux-dirclean:
rm -rf $(LINUX_DIR)
endif
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