Fix CMake target detection and remove compiler warnings #73

	name: Build-Ubuntu-GCC

	on:
	push:
	branches:
	- main
	pull_request:
	branches:
	- main
	workflow_dispatch:

	jobs:
	build_linux_gcc:
	permissions:
	contents: write
	runs-on: ubuntu-latest
	timeout-minutes: 60
	env:
	BUILD_TYPE: Debug

	steps:
	- uses: actions/checkout@v4
	with:
	persist-credentials: true
	clean: true
	fetch-depth: 1
	token: ${{ secrets.GITHUB_TOKEN }}

	- name: Install build tools
	run: \|
	sudo apt update
	sudo apt install -y cmake build-essential ninja-build git

	- name: Cache FetchContent downloads
	uses: actions/cache@v4
	with:
	path: \|
	${{ github.workspace }}/build/_deps
	key: ${{ runner.os }}-gcc-fetchcontent-${{ hashFiles('CMakeLists.txt') }}
	restore-keys: \|
	${{ runner.os }}-gcc-fetchcontent-

	- name: Prepare build directory
	run: \|
	rm -rf build
	mkdir -p build

	- name: Build with GCC (FetchContent mode)
	run: \|
	cd build
	echo "Building with FetchContent to download all external systems..."

	cmake .. \
	-G Ninja \
	-DCMAKE_BUILD_TYPE=$BUILD_TYPE \
	-DMESSAGING_USE_FETCHCONTENT=ON \
	-DMESSAGING_BUILD_TESTS=ON \
	-DMESSAGING_BUILD_EXAMPLES=ON \
	-DCMAKE_INSTALL_PREFIX="../target" \
	-DCMAKE_C_COMPILER=gcc \
	-DCMAKE_CXX_COMPILER=g++

	cmake --build . --parallel $(nproc)

	- name: Run tests
	run: \|
	cd build
	ctest --output-on-failure --parallel \|\| echo "Some tests failed"

	- name: Upload build artifacts
	if: success()
	uses: actions/upload-artifact@v4
	with:
	name: messaging-system-ubuntu-gcc-${{ env.BUILD_TYPE }}
	path: \|
	${{ github.workspace }}/build/bin/
	${{ github.workspace }}/target/
	if-no-files-found: warn

Provide feedback