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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 $(TARGETS),linux),)
+
+# Version of Linux to download and then apply patches to
+DOWNLOAD_LINUX_VERSION=2.4.26
+# Version of Linux AFTER patches
+LINUX_VERSION=2.4.26-erik
+
+LINUX_FORMAT=bzImage
+#LINUX_FORMAT=images/zImage.prep
+LINUX_KARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
+ -e 's/mipsel/mips/' \
+ -e 's/powerpc/ppc/' \
+ -e 's/sh[234]/sh/' \
+ )
+LINUX_BINLOC=arch/$(LINUX_KARCH)/boot/$(LINUX_FORMAT)
+
+LINUX_DIR=$(BUILD_DIR)/linux-$(LINUX_VERSION)
+LINUX_SOURCE=linux-$(DOWNLOAD_LINUX_VERSION).tar.bz2
+LINUX_SITE=http://www.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):
+ -mkdir $(DL_DIR)
+ $(WGET) -P $(DL_DIR) $(LINUX_SITE)/$(LINUX_SOURCE)
+
+$(LINUX_DIR)/.unpacked: $(DL_DIR)/$(LINUX_SOURCE)
+ -mkdir $(TOOL_BUILD_DIR)
+ #mkdir -p $(LINUX_DIR)
+ #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 $(TOOL_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)
+ $(SED) "s,^CROSS_COMPILE.*,CROSS_COMPILE=$(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
+
+linux-source: $(DL_DIR)/$(LINUX_SOURCE)
+
+# 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