Build Systems & Testing
Master C++ build systems and testing — CMake, package managers, unit testing, and continuous integration for C++ projects.
50 min•By Priygop Team•Last updated: Feb 2026
CMake & Build Systems
- CMake: Industry-standard C++ build system — generates Makefiles, Ninja files, VS solutions. Cross-platform. cmake_minimum_required + project + add_executable
- Modern CMake: Use target-based commands — target_link_libraries, target_include_directories, target_compile_features. Better dependency management
- Package Managers: vcpkg (Microsoft, integrates with CMake), Conan (Python-based, flexible), CPM (header-only, URL-based). Manage third-party dependencies
- Compiler Flags: -Wall -Wextra -Werror -pedantic for warnings. -O2/-O3 for release optimization. -g for debug symbols. -fsanitize= for sanitizers
- Ninja: Fast build system — drop-in replacement for Make. cmake -G Ninja generates Ninja files. 2-3x faster than Make for incremental builds
- ccache: Compiler cache — caches compilation results, reuses when source hasn't changed. 10-100x faster rebuilds after clean
Unit Testing
- Google Test (gtest): Most popular C++ test framework — TEST(TestSuite, TestName), EXPECT_EQ, ASSERT_TRUE. Integrates with CMake via FetchContent
- Catch2: Header-only test framework — BDD-style SECTION blocks, natural assertion syntax (REQUIRE(x == 5)). Great for smaller projects
- Google Mock (gmock): Mock objects for testing — create mock implementations of interfaces. EXPECT_CALL(mock, Method()).Times(1).WillReturn(42)
- Fuzzing: AFL, libFuzzer — generate random inputs to find crashes and undefined behavior. Essential for C++ code that processes untrusted input
- Code Coverage: gcov + lcov — measure what percentage of code is tested. Aim for 80%+ on critical paths. Don't optimize for coverage percentage
- Sanitizers in Tests: Always run tests with AddressSanitizer (-fsanitize=address) and UndefinedBehaviorSanitizer (-fsanitize=undefined) in CI