Add musl libc CI #2

	name: Alpine Linux (musl libc)
	on:
	- pull_request
	- push

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	jobs:
	test:
	name: Alpine Linux (musl libc)
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	submodules: true
	fetch-depth: 50

	- name: Setup latest Alpine Linux
	uses: jirutka/setup-alpine@v1
	with:
	packages: >
	ldc
	git
	g++
	cmake
	ninja
	llvm-dev
	llvm-static
	llvm-libunwind-static
	bash
	grep
	diffutils
	make

	- name: Build LDC & LDC D unittests & defaultlib unittest runners
	run: \|
	set -eux
	export CC=gcc
	export CXX=g++
	cmake -G Ninja . \
	-DCMAKE_BUILD_TYPE=Release \
	-DCMAKE_INSTALL_PREFIX="/opt/ldc2" \
	-DCMAKE_EXE_LINKER_FLAGS=-static-libstdc++ \
	-DLLVM_IS_SHARED=OFF \
	-DD_COMPILER_FLAGS=-link-defaultlib-shared=false \
	-DBUILD_SHARED_LIBS=OFF
	ninja obj/ldc2.o all ldc2-unittest all-test-runners
	bin/ldc2 --version
	shell: alpine.sh {0}
	- name: Run LDC D unittests
	if: success() \|\| failure()
	run: ctest --output-on-failure -R "ldc2-unittest"
	shell: alpine.sh {0}
	- name: Run LIT testsuite
	if: success() \|\| failure()
	run: \|
	set -eux
	ctest -V -R "lit-tests"
	shell: alpine.sh {0}
	- name: Run DMD testsuite
	if: success() \|\| failure()
	run: ctest -V -R "dmd-testsuite"
	shell: alpine.sh {0}
	- name: Run defaultlib unittests & druntime integration tests
	if: success() \|\| failure()
	run: \|
	set -eux
	excludes=
	N=$(nproc)
	ctest -j$N --output-on-failure -E "dmd-testsuite\|lit-tests\|ldc2-unittest"
	shell: alpine.sh {0}

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