bpftool: add support for split BTF to gen min_core_btf #91

	name: static LLVM build

	on:
	pull_request:
	paths:
	- '.github/workflows/static-build.yaml'
	- 'include/**'
	- 'libbpf/**'
	- 'src/**'
	push:
	branches:
	- main

	concurrency:
	group: ${{ github.workflow }}-${{ github.event.pull_request.number \|\| github.event.after }}
	cancel-in-progress: true

	jobs:
	build:
	runs-on: ubuntu-22.04
	env:
	LLVM_URL_PREFIX: https://github.com/llvm/llvm-project/releases/download/llvmorg-15.0.0
	LLVM_PATH: clang+llvm-15.0.0-x86_64-linux-gnu-rhel-8.4

	steps:
	- name: Install dependencies
	run: \|
	sudo apt-get update
	sudo apt-get install -y libelf-dev

	- name: Download and extract compiled LLVM release
	run: \|
	curl -L -O "${{ env.LLVM_URL_PREFIX }}/${{ env.LLVM_PATH }}.tar.xz"
	tar -xvf "${{ env.LLVM_PATH }}.tar.xz"

	- name: Checkout bpftool
	uses: actions/checkout@8f4b7f84864484a7bf31766abe9204da3cbe65b3 # v3.5.0
	with:
	submodules: recursive
	# Create a new directory to avoid wiping out LLVM on bpftool checkout
	path: 'bpftool'

	- name: Build bpftool (static build, default LLVM disassembler)
	working-directory: 'bpftool'
	run: \|
	EXTRA_CFLAGS=--static \
	LLVM_CONFIG="${GITHUB_WORKSPACE}/${LLVM_PATH}/bin/llvm-config" \
	LLVM_STRIP="${GITHUB_WORKSPACE}/${LLVM_PATH}/bin/llvm-strip" \
	make -j -C src V=1

	- name: Test bpftool binary
	working-directory: 'bpftool'
	run: \|
	./src/bpftool 2>&1 \| grep -q Usage
	./src/bpftool -p version \| \
	tee /dev/stderr \| \
	jq --exit-status ".features \| .llvm"
	ldd ./src/bpftool 2>&1 \| \
	tee /dev/stderr \| \
	grep -q 'not a dynamic executable'

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