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Allows support for -dt kernel headers clang #21

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Allows support for -dt kernel headers clang #21

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61 changes: 39 additions & 22 deletions config/BoardConfigKernel.mk
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
# Copyright (C) 2018 The LineageOS Project
# Copyright (C) 2018-2020 The LineageOS Project
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
Expand All @@ -25,6 +25,7 @@
# TARGET_KERNEL_CROSS_COMPILE_PREFIX = Compiler prefix (e.g. arm-eabi-)
# defaults to arm-linux-androidkernel- for arm
# aarch64-linux-android- for arm64
# x86_64-linux-android- for x86
#
# TARGET_KERNEL_CLANG_COMPILE = Compile kernel with clang, defaults to false
# TARGET_KERNEL_NEW_GCC_COMPILE = Compile kernel with newer version GCC, defaults to false
Expand All @@ -41,9 +42,6 @@ BUILD_TOP := $(shell pwd)

TARGET_AUTO_KDIR := $(shell echo $(TARGET_DEVICE_DIR) | sed -e 's/^device/kernel/g')
TARGET_KERNEL_SOURCE ?= $(TARGET_AUTO_KDIR)
ifneq ($(TARGET_PREBUILT_KERNEL),)
TARGET_KERNEL_SOURCE :=
endif

TARGET_KERNEL_ARCH := $(strip $(TARGET_KERNEL_ARCH))
ifeq ($(TARGET_KERNEL_ARCH),)
Expand All @@ -52,6 +50,15 @@ else
KERNEL_ARCH := $(TARGET_KERNEL_ARCH)
endif

CLANG_PREBUILTS := $(BUILD_TOP)/prebuilts/clang/host/$(HOST_PREBUILT_TAG)/clang-r383902b
GCC_PREBUILTS := $(BUILD_TOP)/prebuilts/gcc/$(HOST_PREBUILT_TAG)

TARGET_KERNEL_HEADERS ?= $(TARGET_KERNEL_SOURCE)

# x86 toolchain
KERNEL_TOOLCHAIN_x86 := $(GCC_PREBUILTS)/x86/x86_64-linux-android-4.9/bin
KERNEL_TOOLCHAIN_PREFIX_x86 := x86_64-linux-android-

GCC_PREBUILTS := $(BUILD_TOP)/prebuilts/gcc/$(HOST_OS)-x86
ifeq ($(TARGET_KERNEL_NEW_GCC_COMPILE),true)
ifeq ($(TARGET_KERNEL_CLANG_COMPILE),true)
Expand All @@ -71,6 +78,7 @@ else
KERNEL_TOOLCHAIN_arm := $(GCC_PREBUILTS)/arm/arm-linux-androideabi-4.9/bin
KERNEL_TOOLCHAIN_PREFIX_arm := arm-linux-androidkernel-
endif

TARGET_KERNEL_CROSS_COMPILE_PREFIX := $(strip $(TARGET_KERNEL_CROSS_COMPILE_PREFIX))
ifneq ($(TARGET_KERNEL_CROSS_COMPILE_PREFIX),)
KERNEL_TOOLCHAIN_PREFIX ?= $(TARGET_KERNEL_CROSS_COMPILE_PREFIX)
Expand All @@ -90,15 +98,9 @@ endif
KERNEL_TOOLCHAIN_PATH_gcc := $(KERNEL_TOOLCHAIN_$(KERNEL_ARCH))/$(KERNEL_TOOLCHAIN_PREFIX_$(KERNEL_ARCH))

ifneq ($(USE_CCACHE),)
# Detect if the system already has ccache installed to use instead of the prebuilt
ifneq (,$(wildcard $(OUT_DIR)/.path_interposer_origpath))
CCACHE_BIN := $(shell PATH=$(shell cat $(OUT_DIR)/.path_interposer_origpath):$$PATH which ccache)
endif

ifeq ($(CCACHE_BIN),)
CCACHE_BIN := $(BUILD_TOP)/prebuilts/misc/$(HOST_PREBUILT_TAG)/ccache/ccache
# Check that the executable is here.
CCACHE_BIN := $(strip $(wildcard $(CCACHE_BIN)))
ifneq ($(CCACHE_EXEC),)
# Android 10+ deprecates use of a build ccache. Only system installed ones are now allowed
CCACHE_BIN := $(CCACHE_EXEC)
endif
endif

Expand All @@ -117,9 +119,7 @@ endif
KERNEL_MAKE_FLAGS :=

# Add back threads, ninja cuts this to $(nproc)/2
ifneq (,$(wildcard $(OUT_DIR)/.path_interposer_origpath))
KERNEL_MAKE_FLAGS += -j$(shell PATH=$(shell cat $(OUT_DIR)/.path_interposer_origpath):$$PATH nproc --all)
endif
KERNEL_MAKE_FLAGS += -j$(shell prebuilts/tools-lineage/$(HOST_PREBUILT_TAG)/bin/nproc --all)

ifeq ($(KERNEL_ARCH),arm)
# Avoid "Unknown symbol _GLOBAL_OFFSET_TABLE_" errors
Expand All @@ -132,21 +132,38 @@ ifeq ($(KERNEL_ARCH),arm64)
endif

ifeq ($(HOST_OS),darwin)
KERNEL_MAKE_FLAGS += C_INCLUDE_PATH=$(BUILD_TOP)/external/elfutils/libelf:/usr/local/opt/openssl/include
KERNEL_MAKE_FLAGS += LIBRARY_PATH=/usr/local/opt/openssl/lib
KERNEL_MAKE_FLAGS += HOSTCFLAGS="-I$(BUILD_TOP)/external/elfutils/libelf -I/usr/local/opt/openssl/include -fuse-ld=lld" HOSTLDFLAGS="-L/usr/local/opt/openssl/lib -fuse-ld=lld"
else
KERNEL_MAKE_FLAGS += CPATH="/usr/include:/usr/include/x86_64-linux-gnu" HOSTCFLAGS="-fuse-ld=lld" HOSTLDFLAGS="-L/usr/lib/x86_64-linux-gnu -L/usr/lib64 -fuse-ld=lld"
endif

ifneq ($(TARGET_KERNEL_ADDITIONAL_FLAGS),)
KERNEL_MAKE_FLAGS += $(TARGET_KERNEL_ADDITIONAL_FLAGS)
endif

TOOLS_PATH_OVERRIDE := \
PATH=$(BUILD_TOP)/prebuilts/tools-lineage/$(HOST_PREBUILT_TAG)/bin:$$PATH \
LD_LIBRARY_PATH=$(BUILD_TOP)/prebuilts/tools-lineage/$(HOST_PREBUILT_TAG)/lib:$$LD_LIBRARY_PATH \
PERL5LIB=$(BUILD_TOP)/prebuilts/tools-lineage/common/perl-base

# Set DTBO image locations so the build system knows to build them
ifeq ($(TARGET_NEEDS_DTBOIMAGE),true)
BOARD_PREBUILT_DTBOIMAGE ?= $(PRODUCT_OUT)/dtbo/arch/$(KERNEL_ARCH)/boot/dtbo.img
else ifeq ($(BOARD_KERNEL_SEPARATED_DTBO),true)
BOARD_PREBUILT_DTBOIMAGE ?= $(PRODUCT_OUT)/dtbo-pre.img
ifeq (true,$(filter true, $(TARGET_NEEDS_DTBOIMAGE) $(BOARD_KERNEL_SEPARATED_DTBO)))
BOARD_PREBUILT_DTBOIMAGE ?= $(TARGET_OUT_INTERMEDIATES)/DTBO_OBJ/arch/$(KERNEL_ARCH)/boot/dtbo.img
endif

# Set use the full path to the make command
KERNEL_MAKE_CMD := $(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/make

# Set the full path to the clang command
KERNEL_MAKE_FLAGS += HOSTCC=$(CLANG_PREBUILTS)/bin/clang
KERNEL_MAKE_FLAGS += HOSTCXX=$(CLANG_PREBUILTS)/bin/clang++

# Since Linux 4.16, flex and bison are required
KERNEL_MAKE_FLAGS += LEX=$(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/flex
KERNEL_MAKE_FLAGS += YACC=$(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/bison
KERNEL_MAKE_FLAGS += M4=$(BUILD_TOP)/prebuilts/build-tools/$(HOST_PREBUILT_TAG)/bin/m4
TOOLS_PATH_OVERRIDE += BISON_PKGDATADIR=$(BUILD_TOP)/prebuilts/build-tools/common/bison

# Set the out dir for the kernel's O= arg
# This needs to be an absolute path, so only set this if the standard out dir isn't used
OUT_DIR_PREFIX := $(shell echo $(OUT_DIR) | sed -e 's|/target/.*$$||g')
Expand Down