compress.c: fix -std=c23 build failure (signal handler protos) #58

	# GitHub actions workflow.
	# https://help.github.com/en/actions/automating-your-workflow-with-github-actions/workflow-syntax-for-github-actions

	name: Build+Test CI

	on:
	push:
	branches: [main, gh-actions]
	tags: [v*]
	pull_request:
	types: [opened]
	branches: [main]

	jobs:
	build-test-posix:
	strategy:
	matrix:
	os: [ubuntu-latest, macos-latest]
	cc: [gcc, clang]
	exclude:
	- os: macos-latest
	cc: gcc
	runs-on: ${{ matrix.os }}
	env:
	CC: ${{ matrix.cc }}
	steps:
	- uses: actions/checkout@v3
	- run: make
	- run: make check
	- run: make install DESTDIR="${PWD}/root/"

	build-test-windows:
	strategy:
	matrix:
	os: [windows-latest]
	cc: [mingw32, mingw64]
	runs-on: ${{ matrix.os }}
	env:
	SUBDIR: ${{ matrix.cc }}
	defaults:
	run:
	shell: bash
	steps:
	- uses: actions/checkout@v3
	- name: compile
	run:
	/c/msys64/${SUBDIR}/bin/clang.exe
	-o compress
	-Wall
	-DNOFUNCDEF -DUSERMEM=800000 -DREGISTERS=3 -D_CRT_SECURE_NO_WARNINGS
	compress.c
	# The tests currently fail on Windows. No idea why.
	- name: test
	run: set +e; ./tests/runtests.sh; echo "Test exited $?"; exit 0

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