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tools/llvm-bpf: add llvm+clang build suitable for compiling code to eBPF

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Preparation for building packages that ship eBPF code

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2021-10-17 17:50:53 +02:00
parent 1c07eab9f8
commit faa6a9a04b
3 changed files with 45 additions and 0 deletions
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7
toolchain/Config.in
View File

@ -37,6 +37,13 @@ menuconfig TARGET_OPTIONS
Most people will answer N.
config BUILD_LLVM_BPF
bool "Build LLVM toolchain for eBPF" if DEVEL
help
If enabled, a LLVM toolchain for building eBPF binaries will be built.
If this is not enabled, eBPF packages can only be built if the host
has a suitable toolchain
menuconfig EXTERNAL_TOOLCHAIN
bool

2
tools/Makefile
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@ -35,6 +35,7 @@ tools-$(CONFIG_TARGET_mxs) += elftosb sdimage
tools-$(CONFIG_TARGET_tegra) += cbootimage cbootimage-configs
tools-$(CONFIG_USES_MINOR) += kernel2minor
tools-$(CONFIG_USE_SPARSE) += sparse
tools-$(CONFIG_BUILD_LLVM_BPF) += llvm-bpf
# builddir dependencies
$(curdir)/autoconf/compile := $(curdir)/m4/compile
@ -56,6 +57,7 @@ $(curdir)/isl/compile := $(curdir)/gmp/compile
$(curdir)/libressl/compile := $(curdir)/pkgconf/compile
$(curdir)/libtool/compile := $(curdir)/m4/compile $(curdir)/autoconf/compile $(curdir)/automake/compile $(curdir)/missing-macros/compile
$(curdir)/lzma-old/compile := $(curdir)/zlib/compile
$(curdir)/llvm-bpf/compile := $(curdir)/cmake/compile
$(curdir)/make-ext4fs/compile := $(curdir)/zlib/compile
$(curdir)/meson/compile := $(curdir)/ninja/compile
$(curdir)/missing-macros/compile := $(curdir)/autoconf/compile

36
tools/llvm-bpf/Makefile Normal file
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@ -0,0 +1,36 @@
#
# Copyright (C) 2006-2016 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#
include $(TOPDIR)/rules.mk
PKG_NAME:=llvm-project
PKG_VERSION:=13.0.0
PKG_RELEASE:=1
PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).src.tar.xz
PKG_SOURCE_URL:=https://github.com/llvm/llvm-project/releases/download/llvmorg-$(PKG_VERSION)
PKG_HASH:=6075ad30f1ac0e15f07c1bf062c1e1268c241d674f11bd32cdf0e040c71f2bf3
HOST_BUILD_DIR:=$(BUILD_DIR_HOST)/$(PKG_NAME)-$(PKG_VERSION).src
HOST_BUILD_PARALLEL:=1
CMAKE_BINARY_SUBDIR := build
CMAKE_SOURCE_SUBDIR := llvm
include $(INCLUDE_DIR)/host-build.mk
include $(INCLUDE_DIR)/cmake.mk
CMAKE_HOST_OPTIONS += \
-DLLVM_ENABLE_BINDINGS=OFF \
-DLLVM_INCLUDE_DOCS=OFF \
-DLLVM_INCLUDE_EXAMPLES=OFF \
-DLLVM_INCLUDE_TESTS=OFF \
-DLLVM_ENABLE_PROJECTS="clang;lld" \
-DLLVM_TARGETS_TO_BUILD=BPF \
-DCLANG_BUILD_EXAMPLES=OFF
$(eval $(call HostBuild))