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crossdev: Bootstrap the full LLVM toolchain #24

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crossdev: Bootstrap the full LLVM toolchain
vadorovsky Sep 13, 2025
11db192
scripts: Always pull the container image
vadorovsky Sep 16, 2025
f77b754
ci: Test building sysroots with LLVM
vadorovsky Sep 14, 2025
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122 changes: 117 additions & 5 deletions .github/workflows/crossdev.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -18,63 +18,147 @@ jobs:
# requests fixing them welcome!
target:
- target: aarch64-unknown-linux-gnu
gcc: true
llvm: false
- target: aarch64-unknown-linux-musl
gcc: true
llvm: true
- target: aarch64_be-unknown-linux-gnu
gcc: true
llvm: false
- target: alpha-unknown-linux-gnu
gcc: true
llvm: false
- target: arm-unknown-linux-gnueabi
gcc: true
llvm: false
- target: arm-unknown-linux-gnueabihf
gcc: true
llvm: false
- target: arm-unknown-linux-musleabi
gcc: true
llvm: false
- target: arm-unknown-linux-musleabihf
gcc: true
llvm: false
- target: armeb-unknown-linux-gnueabi
gcc: true
llvm: false
- target: armeb-unknown-linux-gnueabihf
gcc: true
llvm: false
- target: armeb-unknown-linux-musleabi
gcc: true
llvm: false
- target: armeb-unknown-linux-musleabihf
gcc: true
llvm: false
- target: armv7-unknown-linux-musleabi
gcc: true
llvm: false
- target: armv7-unknown-linux-musleabihf
gcc: true
llvm: false
- target: armv6j-softfp-linux-gnueabi
gcc: true
llvm: false
- target: armv6j-unknown-linux-gnueabihf
gcc: true
llvm: false
- target: armv7a-softfp-linux-gnueabi
gcc: true
llvm: false
- target: armv7a-unknown-linux-gnueabihf
gcc: true
llvm: false
- target: hppa1.1-unknown-linux-gnu
gcc: true
llvm: false
- target: hppa2.0-unknown-linux-gnu
gcc: true
llvm: false
- target: hppa64-unknown-linux-gnu
args: --skip-system
gcc: true
llvm: false
- target: loongarch64-unknown-linux-gnu
gcc: true
llvm: false
# musl ebuilds don't support loong. The target is supported upstream,
# we need to fix and test our ebuilds.
#- target: loongarch64-unknown-linux-musl
- target: m68k-unknown-linux-gnu
gcc: true
llvm: false
- target: mips-unknown-linux-gnu
gcc: true
llvm: false
- target: mips-unknown-linux-musl
gcc: true
llvm: false
- target: mipsel-unknown-linux-gnu
gcc: true
llvm: false
- target: mipsel-unknown-linux-musl
gcc: true
llvm: false
- target: mips64-unknown-linux-gnu
gcc: true
llvm: false
# libgcc_s.so fails to build: `cannot find crti.o: No such file or
# directory`.
# - target: mips64-unknown-linux-musl
- target: mips64el-unknown-linux-gnu
gcc: true
llvm: false
# libgcc_s.so fails to build: `cannot find crti.o: No such file or
# directory`.
# - target: mips64el-unknown-linux-musl
- target: or1k-unknown-linux-gnu
args: --skip-system
gcc: true
llvm: false
- target: or1k-unknown-linux-musl
args: --skip-system
gcc: true
llvm: false
- target: powerpc-unknown-linux-gnu
gcc: true
llvm: false
- target: powerpc-unknown-linux-musl
gcc: true
llvm: false
- target: powerpc64-unknown-linux-gnu
gcc: true
llvm: false
- target: powerpc64-unknown-linux-musl
gcc: true
llvm: false
- target: powerpc64le-unknown-linux-gnu
gcc: true
llvm: false
- target: riscv32-unknown-linux-gnu
gcc: true
llvm: false
# busybox fails to build: `‘SYS_settimeofday’ undeclared`.
# - target: riscv32-unknown-linux-musl
- target: riscv64-unknown-linux-gnu
gcc: true
llvm: false
- target: riscv64-unknown-linux-musl
gcc: true
llvm: true
# glibc fails to build: `no support for pre-v8 sparc`.
# - target: sparc-unknown-linux-gnu
- target: sparc64-unknown-linux-gnu
gcc: true
llvm: false
- target: s390-ibm-linux-gnu
gcc: true
llvm: false
- target: s390x-ibm-linux-gnu
gcc: true
llvm: false
# musl ebuilds don't support s390x. The target is supported upstream,
# we need to fix and test our ebuilds.
# - target: s390x-unknown-linux-musl
Expand All @@ -89,30 +173,58 @@ jobs:
# - target: sh4eb-unknown-linux-gnu
# - target: sh4eb-unknown-linux-musl
- target: x86_64-unknown-linux-gnu
gcc: true
llvm: false
- target: x86_64-unknown-linux-musl
gcc: true
llvm: true
# Embedded or otherwise special targets
- target: arm-none-eabi
args: --skip-system
gcc: true
llvm: false
- target: avr
args: --skip-system
gcc: true
llvm: false
- target: nvptx-none
args: --skip-system
gcc: true
llvm: false
- target: bpf-unknown-none
args: --skip-system
gcc: true
llvm: false
stage3:
- latest # `openrc` (glibc+GCC) is tagged as `latest`
- musl
- latest # glibc+GCC
- llvm # glibc+LLVM and GCC as a fallback
- musl # musl+GCC
fail-fast: false
name: crossdev target=${{ matrix.target.target }} stage3=${{ matrix.stage3 }}
env:
CONTAINER_ENGINE: docker
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v4

- name: Create cross environment
env:
CONTAINER_ENGINE: docker
- name: Create cross environment with GCC
# Building GCC-based sysroots on llvm stage3 should be possible, since
# it contains a fallback GCC toolchain. But in practice, it fails for
# certain architectures. Pull requests welcome!
if: ${{ matrix.target.gcc && !contains(matrix.stage3, 'llvm') }}
run: |
./scripts/container_test.sh \
--tag ${{ matrix.stage3 }} \
--target ${{ matrix.target.target }} \
${{ matrix.target.args }}

- name: Create cross environment with LLVM
# * We need LLVM toolchain to be present in the stage3.
# * Building sysroots with glibc and LLVM is not yet supported.
if: ${{ matrix.target.llvm && contains(matrix.stage3, 'llvm') }}
run: |
./scripts/container_test.sh \
--llvm \
--tag ${{ matrix.stage3 }} \
--target ${{ matrix.target.target }} \
${{ matrix.target.args }}
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