Started a ThreadX module port for the Cortex-R52, headers first #53

	name: clang_check

	# Builds the Arm ports with Arm Toolchain for Embedded, which is LLVM based and
	# is the successor to Arm Compiler 6. The gnu ports are otherwise only ever
	# built with GNU tooling, and GNU as accepts several non-canonical forms that
	# LLVM's assembler rejects; this catches those before they accumulate.
	on:
	pull_request:
	branches: [ master, dev ]
	paths:
	- ".github/workflows/clang_check.yml"
	- "scripts/check_clang.sh"
	- "common/**"
	- "ports/**"
	- "ports_arch/**"
	- "ports_module/**"
	- "ports_smp/**"

	jobs:
	atfe:
	runs-on: ubuntu-24.04

	env:
	# Pinned deliberately, as the runner image is: a toolchain upgrade should
	# be a reviewable commit rather than something that changes underneath the
	# ports. Releases: https://github.com/arm/arm-toolchain/releases
	ATFE_VERSION: 22.1.0

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

	- name: Cache Arm Toolchain for Embedded
	id: cache-atfe
	uses: actions/cache@v4
	with:
	path: atfe
	key: atfe-${{ env.ATFE_VERSION }}-linux-x86_64

	- name: Install Arm Toolchain for Embedded
	if: steps.cache-atfe.outputs.cache-hit != 'true'
	run: \|
	set -eu
	base="https://github.com/arm/arm-toolchain/releases/download/release-${ATFE_VERSION}-ATfE"
	archive="ATfE-${ATFE_VERSION}-Linux-x86_64.tar.xz"
	mkdir -p atfe && cd atfe
	curl -fsSLO "$base/$archive"
	curl -fsSLO "$base/$archive.sha256"
	sha256sum -c "$archive.sha256"
	tar xf "$archive"
	rm -f "$archive"

	- name: Build the Arm ports with clang
	run: scripts/check_clang.sh --clang "atfe/ATfE-${ATFE_VERSION}-Linux-x86_64/bin/clang"

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