Fix warnings from gcc #58

	name: Test building C++ targets

	on:
	push:
	branches:
	- main

	jobs:
	setup-matrix:
	runs-on: ubuntu-latest
	name: Get changed files
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 2

	- name: Get changed files
	id: changed-files
	uses: tj-actions/changed-files@v40
	with:
	json: true
	files: \|
	.github/workflows/gen_matrix.py
	.github/workflows/test-build.yml
	/src/day.cpp
	/src/day.hpp
	/src/lib.h
	*/Makefile

	# reference: https://stackoverflow.com/a/65094398
	- name: Setup matrix combinations
	id: setup-matrix-combinations
	run: python $GITHUB_WORKSPACE/.github/workflows/gen_matrix.py "${{ steps.changed-files.outputs.all_changed_files }}" $GITHUB_OUTPUT "day\|test"

	outputs:
	matrix-combinations: ${{ steps.setup-matrix-combinations.outputs.matrix-combinations }}

	matrix-job:
	runs-on: ubuntu-latest
	needs: setup-matrix
	if: ${{ needs.setup-matrix.outputs.matrix-combinations != '{}' }}
	strategy:
	fail-fast: false
	matrix: ${{ fromJson(needs.setup-matrix.outputs.matrix-combinations) }}
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 1

	- name: Install compiler
	run: \|
	sudo apt-get -qq -y update
	if [[ ${{ matrix.compiler }} == clang++ ]]; then
	sudo apt-get -qq -y install clang
	else
	sudo apt-get -qq -y install g++
	fi

	- name: Build targets
	run: \|
	cd ${{ matrix.directory }}
	make -j2 CXX=${{ matrix.compiler }} DISABLE_SANITIZERS=TRUE DISABLE_BEAR=TRUE build/release/${{ matrix.target }} build/debug/${{ matrix.target }} build/fast/${{ matrix.target }}

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