Experimenting with C++ threads to replace Intel TBB #5843

	name: Header checks

	on:
	pull_request:
	branches: [ develop, master ]
	push:
	branches: [ develop, master ]
	paths-ignore:
	- 'doygen/**'
	- 'hooks/**'
	- 'licenses/**'
	- 'LICENSE.md'
	- 'README.md'
	- 'RELEASE-NOTES.txt'

	permissions:
	contents: read

	concurrency:
	group: ${{ github.workflow }}-${{ github.head_ref \|\| github.run_id }}
	cancel-in-progress: true

	jobs:
	windows:
	name: Windows
	runs-on: windows-latest

	steps:
	- uses: actions/checkout@v6
	- uses: actions/setup-python@v6
	with:
	python-version: '3.x'

	- name: Print g++/mingw32-make version and path
	run: \|
	g++ --version
	Get-Command g++ \| Select-Object -ExpandProperty Definition
	mingw32-make --version
	Get-Command mingw32-make \| Select-Object -ExpandProperty Definition
	shell: powershell

	- name: Build Math libs
	shell: powershell
	run: mingw32-make -f make/standalone math-libs -j2

	- name: Run header tests
	shell: powershell
	run: make -j2 test-headers

	opencl:
	name: OpenCL
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v6

	- name: Run header tests
	run: \|
	echo "STAN_OPENCL=true" > make/local
	make -j2 test-headers
	no_range_checks:
	name: NoRange
	runs-on: ubuntu-latest

	steps:
	- uses: actions/checkout@v6

	- name: Run header tests
	run: \|
	echo "STAN_NO_RANGE_CHECKS=true" > make/local
	./runTests.py -j2 ./test/unit/math/prim/err/

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