Probe

CMake template for rapid prototyping and testing C++ code snippets.

Features

• Auto-detects source files with main()
• Integrated Clang-Formatting (automatic code formating before building)
• C++20 by default
• Cross-platform support
• Per-target compile definitions via .cfg files
• Automatic reconfiguration on file changes

Usage

Configure the project and build all targets

cmake -B build
cmake --build build

Project Structure

probe/
├─ CMakeLists.txt    # Main CMake configuration
├─ cmake/            # Custom CMake scripts and modules
├─ include/          # Public headers (visible to all targets)
└─ src/              # Implementation & private headers

File Types and Their Roles

Public Headers (include/)

• *.h / *.hpp: Public headers (visible to all targets and external projects).

Source Files (src/)

• *.cpp: Implementation files.
  • Files containing main() are built as executables.
  • Files without main() are compiled into OBJECT libraries.
• *.h / *.hpp: Private headers (visible only within src/).
• Files and directories starting with _ are ignored (e.g., _internal.cpp, _private/).

Configuration Files (src/)

• <name>.cfg: Per-target compile definitions.
  • Automatically loaded if a file with the same base name as the source file exists.
  • Example: app.cpp → app.cfg.

Example

Source File (src/app.cpp)

#include <iostream>

int main()
{
#ifdef MY_CUSTOM_DEFINE
  std::cout << "Hello, World!\n";
#endif
  return 0;
}

Configuration File (src/app.cfg)

MY_CUSTOM_DEFINE=1