Fix(system_subprocess): save_completed_state passing stderr instead o… #17

	name: CI - Big-Endian

	on:
	# Always run on pushes to the main branch
	push:
	branches: [master, main]
	# For PRs, ONLY run if the hash files or this workflow change
	pull_request:
	paths:
	- '.github/workflows/ci_big_endian.yml'
	- 'src/hash/**'
	- 'test/hash_functions/**'
	# Allow manual triggers from the GitHub Actions tab
	workflow_dispatch:

	env:
	CTEST_TIME_TIMEOUT: "5" # some failures hang forever

	jobs:
	test-big-endian:
	runs-on: ubuntu-24.04
	name: Test on s390x (big-endian)
	strategy:
	fail-fast: false

	steps:
	- name: Checkout code
	uses: actions/checkout@v4

	- name: Build and test on s390x
	uses: uraimo/run-on-arch-action@v3
	with:
	arch: s390x
	distro: ubuntu24.04

	# Cache Docker image layer in GitHub Package Registry
	githubToken: ${{ github.token }}

	# Install dependencies (cached in Docker image layer)
	install: \|
	apt-get update -q -y
	apt-get install -q -y gfortran gcc g++ cmake python3-pip ninja-build git
	pip3 install --break-system-packages fypp

	# Build and run big-endian tests
	run: \|
	echo "=== Architecture Info ==="
	uname -m
	echo "Byte order: $(python3 -c 'import sys; print(sys.byteorder)')"

	echo "=== Compiler Version ==="
	gfortran --version

	echo "=== CMake Configure ==="
	cmake -G Ninja \
	-DCMAKE_BUILD_TYPE=Release \
	-DCMAKE_MAXIMUM_RANK:String=4 \
	-DFIND_BLAS:STRING=FALSE \
	-S . -B build

	echo "=== Build (Targeted) ==="
	cmake --build build --target test_hash_functions --parallel

	echo "=== Run Big-Endian Tests ==="
	ctest --test-dir build \
	-R hash_functions \
	--output-on-failure \
	--no-tests=error

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