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#
# Copyright (C) 2006-2009 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
override QUILT:=
override HOST_QUILT:=
include $(INCLUDE_DIR)/kernel.mk
PKG_NAME:=linux
PKG_PATCHVER:=5.10
PKG_VERSION:=$(PKG_PATCHVER)$(strip $(LINUX_VERSION-$(PKG_PATCHVER)))
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
PKG_SOURCE_URL:=$(LINUX_SITE)
PKG_HASH:=$(LINUX_KERNEL_HASH-$(strip $(PKG_VERSION)))
PKG_BUILD_DIR:=$(KERNEL_BUILD_DIR)/bpf-headers/$(PKG_NAME)-$(PKG_VERSION)
GENERIC_BACKPORT_DIR := $(GENERIC_PLATFORM_DIR)/backport$(if $(wildcard $(GENERIC_PLATFORM_DIR)/backport-$(PKG_PATCHVER)),-$(PKG_PATCHVER))
GENERIC_PATCH_DIR := $(GENERIC_PLATFORM_DIR)/pending$(if $(wildcard $(GENERIC_PLATFORM_DIR)/pending-$(PKG_PATCHVER)),-$(PKG_PATCHVER))
GENERIC_HACK_DIR := $(GENERIC_PLATFORM_DIR)/hack$(if $(wildcard $(GENERIC_PLATFORM_DIR)/hack-$(PKG_PATCHVER)),-$(PKG_PATCHVER))
GENERIC_FILES_DIR := $(foreach dir,$(wildcard $(GENERIC_PLATFORM_DIR)/files $(GENERIC_PLATFORM_DIR)/files-$(PKG_PATCHVER)),"$(dir)")
PATCH_DIR := $(CURDIR)/patches
FILES_DIR :=
REAL_LINUX_DIR := $(LINUX_DIR)
LINUX_DIR := $(PKG_BUILD_DIR)
include $(INCLUDE_DIR)/bpf.mk
include $(INCLUDE_DIR)/package.mk
define Package/bpf-headers
SECTION:=kernel
CATEGORY:=Kernel
TITLE:=eBPF kernel headers
BUILDONLY:=1
HIDDEN:=1
endef
PKG_CONFIG_PATH:=
export HOST_EXTRACFLAGS=-I$(STAGING_DIR_HOST)/include
KERNEL_MAKE := \
$(MAKE) -C $(PKG_BUILD_DIR) \
ARCH=$(BPF_KARCH) \
CROSS_COMPILE=$(BPF_ARCH)-linux- \
LLVM=1 CC="$(CLANG)" LD="$(TARGET_CROSS)ld" \
HOSTCC="$(HOSTCC)" \
HOSTCXX="$(HOSTCXX)" \
HOST_LOADLIBES="-L$(STAGING_DIR_HOST)/lib" \
KBUILD_HOSTLDLIBS="-L$(STAGING_DIR_HOST)/lib" \
CONFIG_SHELL="$(BASH)" \
INSTALL_HDR_PATH="$(PKG_BUILD_DIR)/user_headers"
define Build/Patch
$(Kernel/Patch/Default)
endef
BPF_DOC = $(PKG_BUILD_DIR)/scripts/bpf_helpers_doc.py
define Build/Configure/64
echo 'CONFIG_CPU_MIPS64_R2=y' >> $(PKG_BUILD_DIR)/.config
echo 'CONFIG_64BIT=y' >> $(PKG_BUILD_DIR)/.config
endef
define Build/Configure
grep -vE 'CONFIG_(CPU_.*ENDIAN|HZ)' $(PKG_BUILD_DIR)/arch/mips/configs/generic_defconfig > $(PKG_BUILD_DIR)/.config
echo 'CONFIG_CPU_$(if $(CONFIG_BIG_ENDIAN),BIG,LITTLE)_ENDIAN=y' >> $(PKG_BUILD_DIR)/.config
$(if $(CONFIG_ARCH_64BIT),$(Build/Configure/64))
grep CONFIG_HZ $(REAL_LINUX_DIR)/.config >> $(PKG_BUILD_DIR)/.config
yes '' | $(KERNEL_MAKE) oldconfig
grep 'CONFIG_HZ=' $(REAL_LINUX_DIR)/.config | \
cut -d= -f2 | \
bc -q $(LINUX_DIR)/kernel/time/timeconst.bc \
> $(LINUX_DIR)/include/generated/timeconst.h
$(BPF_DOC) --header \
--file $(LINUX_DIR)/tools/include/uapi/linux/bpf.h \
> $(PKG_BUILD_DIR)/tools/lib/bpf/bpf_helper_defs.h
endef
define Build/Compile
$(KERNEL_MAKE) archprepare headers_install
endef
define Build/InstallDev
mkdir -p $(1)/bpf-headers/arch $(1)/bpf-headers/tools
$(CP) \
$(PKG_BUILD_DIR)/arch/$(BPF_KARCH) \
$(1)/bpf-headers/arch/
$(CP) \
$(PKG_BUILD_DIR)/tools/lib \
$(PKG_BUILD_DIR)/tools/testing \
$(1)/bpf-headers/tools/
$(CP) \
$(PKG_BUILD_DIR)/include \
$(PKG_BUILD_DIR)/samples \
$(PKG_BUILD_DIR)/scripts \
$(PKG_BUILD_DIR)/user_headers \
$(1)/bpf-headers
endef
$(eval $(call BuildPackage,bpf-headers))
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