CI: add gcc8,gcc7,gcc6 #10

	name: benchmarks
	on:
	push:
	branches: [ '*' ]
	pull_request:
	branches: [ "main" ]
	jobs:
	build-all:
	strategy:
	matrix:
	arm-gcc-release: [14.2.Rel1, 13.3.Rel1, 12.3.Rel1, 11.3.Rel1, 10.3-2021.10, 9-2020-q2, 8-2019-q3, 7-2018-q2, 6-2017-q2]
	runs-on: ubuntu-latest
	name: benchmarks (gcc ${{ matrix.arm-gcc-release }})
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	submodules: recursive
	- name: Install qemu-system
	run: \|
	sudo apt update
	sudo apt install -y qemu-system
	- name: Install dependencies
	run: pip3 install -r requirements.txt
	- name: Install Toolchain
	uses: carlosperate/[email protected]
	with:
	release: ${{ matrix.arm-gcc-release }}
	# cycle counts are not meaningful, but at least we can make sure benchmarks compile and run
	- name: Benchmarks (mps2-an386)
	run: ./benchmarks.py -p mps2-an386

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