# Cmake Modern

> Modern CMake

- Skill: `comeonoliver/cmake-modern` (Agent Skill)
- Install (CLI): `npx skillmds@latest add comeonoliver/cmake-modern`
- Raw SKILL.md: https://api.skillmd.com/api/skills/comeonoliver/cmake-modern/raw
- Safety review: pending (external: skill-scanner PASS, skillspector PASS)
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: ComeOnOliver (https://skillmd.com/u/comeonoliver)
- Updated: 2026-09-21
- Page: https://skillmd.com/skills/comeonoliver/cmake-modern

---

# Modern CMake

## Minimal Project
```cmake
cmake_minimum_required(VERSION 3.20)
project(MyApp VERSION 1.0 LANGUAGES CXX)
set(CMAKE_CXX_STANDARD 20)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON)

add_library(mylib src/lib.cpp)
target_include_directories(mylib PUBLIC include)

add_executable(myapp src/main.cpp)
target_link_libraries(myapp PRIVATE mylib)
```

## FetchContent Dependencies
```cmake
include(FetchContent)
FetchContent_Declare(fmt GIT_REPOSITORY https://github.com/fmtlib/fmt.git GIT_TAG 10.2.1)
FetchContent_MakeAvailable(fmt)
target_link_libraries(myapp PRIVATE fmt::fmt)
```

## Build
```bash
cmake -B build -DCMAKE_BUILD_TYPE=Release
cmake --build build --parallel
ctest --test-dir build
```

## Presets (CMakePresets.json) for reproducible dev/release builds
## Best: Use target_* commands, not global include_directories()