Backport managarm/gcc@61271f4791185686062498d006f46495b5143dab into c… #8

	name: Build and install GCC headers

	on:
	push:
	branches:
	- 'trunk'

	jobs:
	install-headers:
	strategy:
	matrix:
	target_arch: [i686, x86_64, aarch64, loongarch64, riscv64]

	runs-on: ubuntu-latest
	container: archlinux:latest

	steps:
	- name: Install dependencies
	run: pacman --noconfirm -Syu && pacman --needed --noconfirm -S base-devel git autoconf automake wget

	- name: Check out repository code
	uses: actions/checkout@v4

	- name: Git config
	run: git config --global --add safe.directory "$GITHUB_WORKSPACE"

	- name: Build toolchain
	run: \|
	set -ex
	TARGET="${{matrix.target_arch}}-elf" ./make_toolchain.sh

	- name: Move headers
	run: \|
	set -ex
	mkdir -p ${{matrix.target_arch}}
	rm -rf ${{matrix.target_arch}}/include
	mv toolchain/include/c++/* ${{matrix.target_arch}}/include
	cp -rp ${{matrix.target_arch}}/include/${{matrix.target_arch}}-elf/* ${{matrix.target_arch}}/include/
	rm -rf ${{matrix.target_arch}}/include/${{matrix.target_arch}}-elf
	for f in patches/*; do \
	( cd ${{matrix.target_arch}} && patch -p0 <../$f ); \
	done

	- name: Push
	run: \|
	set -ex
	git config user.name 'mintsuki'
	git config user.email 'mintsuki@users.noreply.github.com'
	git remote set-url origin https://x-access-token:${{ secrets.GITHUB_TOKEN }}@github.com/osdev0/freestnd-cxx-hdrs.git
	while true; do \
	git pull --all; \
	git add ${{matrix.target_arch}}; \
	git commit --allow-empty -m "Upload headers (${{matrix.target_arch}}) [ci skip]"; \
	if git push origin trunk; then \
	break; \
	else \
	git reset HEAD~1; \
	fi; \
	done

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