include $(TOPDIR)/rules.mk
include ../rules.mk

# linux kernel headers for toolchain

LINUX_HEADERS_VERSION=2.4.36.9
LINUX_KERNEL_MD5SUM:=46388f7528d3ee326a665bcb7969c66c
LINUX_HEADERS_SITE= https://www.kernel.org/pub/linux/kernel/v2.4 \

SOURCE=linux-$(LINUX_HEADERS_VERSION).tar.bz2
LINUX_HEADERS_ARCH:=$(shell echo $(ARCH) | sed -e 's/i[3-9]86/i386/' \
	-e 's/mipseb/mips/' \
	-e 's/mipsel/mips/' \
	-e 's/powerpc/ppc/' \
	-e 's/sh[234]/sh/' \
	-e 's/armeb/arm/' \
	)

$(DL_DIR)/$(SOURCE):
	-mkdir -p $(DL_DIR)
	$(SCRIPT_DIR)/download.pl $(DL_DIR) $(SOURCE) $(LINUX_KERNEL_MD5SUM) $(LINUX_HEADERS_SITE)

$(LINUX_HEADERS_DIR)/.unpacked: $(DL_DIR)/$(SOURCE)
	mkdir -p $(TOOLCHAIN_BUILD_DIR)
	cd $(TOOLCHAIN_BUILD_DIR) && bzip2 -dc $(DL_DIR)/$(SOURCE) | tar -xf - \
		linux-$(LINUX_HEADERS_VERSION)/include \
		linux-$(LINUX_HEADERS_VERSION)/Makefile \
		linux-$(LINUX_HEADERS_VERSION)/Rules.make \
		linux-$(LINUX_HEADERS_VERSION)/arch/$(LINUX_HEADERS_ARCH)/Makefile \
		linux-$(LINUX_HEADERS_VERSION)/scripts \
		linux-$(LINUX_HEADERS_VERSION)/arch/$(LINUX_HEADERS_ARCH)/config*.in \
		linux-$(LINUX_HEADERS_VERSION)/*/*/Config.in \
		linux-$(LINUX_HEADERS_VERSION)/*/Config.in
	cd $(LINUX_HEADERS_DIR)-$(LINUX_HEADERS_VERSION) && \
	    for f in $(TOPDIR)/toolchain/kernel-headers/patches/*.patch; do \
		patch -lp1 <$$f; \
	done
	ln -sf $(LINUX_HEADERS_DIR)-$(LINUX_HEADERS_VERSION) $(LINUX_HEADERS_DIR)
	$(SED) 's/@expr length/@-expr length/' $(LINUX_HEADERS_DIR)/Makefile
	touch $(LINUX_HEADERS_DIR)/.unpacked

$(LINUX_HEADERS_DIR)/.configured: $(LINUX_HEADERS_DIR)/.unpacked
	-$(CP) ./files/config.$(LINUX_HEADERS_ARCH) $(LINUX_HEADERS_DIR)/.config
	$(MAKE) -C $(LINUX_HEADERS_DIR) ARCH=$(LINUX_HEADERS_ARCH) oldconfig include/linux/version.h
	mkdir -p $(STAGING_DIR)/usr/include
	cp -a $(LINUX_HEADERS_DIR)/include/* $(STAGING_DIR)/usr/include
	touch $(LINUX_HEADERS_DIR)/.configured

source: $(DL_DIR)/$(SOURCE)
prepare: $(LINUX_HEADERS_DIR)/.configured
compile:
install:
clean:
	rm -rf $(LINUX_HEADERS_DIR)
