cbuild.py

A simple C build system.

Algorithm

• Find all .c files recursively starting from project root.
• Parse #include lines and figure out which .c files depend on which .h files.
• Recompile the .o file if either .c file or any of the header files it depends on is newer than the .o file.
• Link all the .o files into the binary.

How to use

• Copy cbuild.py to your project root.
• Run ./cbuild.py config to see the default config.
• Create cbuild.json if you want to override any of the config values.
• Run ./cbuild.py run to build and run your project.
• See the output of ./cbuild.py help for more info.

Using as a submodule

Why? Easier to update, get bug fixes faster.

This shouldn't be necessary as time goes on and cbuild.py becomes more and more complete.

git submodule add https://github.com/itsfarseen/cbuild.py
ln -s cbuild.py/cbuild.py cbuild

Commit the changes:

git add .gitmodules cbuild.py cbuild
git commit

Now you can run cbuild using ./cbuild

Configuration

Create a cbuild.json file in the project root.

Example config

{
  // Scan only files under this folder.
  // Files outside this folder (eg. system libraries) are assumed to never change.
  "project_root": ".", 
  // C compiler executable.
  "cc": "gcc",
  // Flags to pass in during compiling
  "cflags": "",
  // Flags to pass in during linking
  "ldflags": "",
  // Ignore .c files in these folders.
  "ignore_dirs": [
    ".git",
    ".ccls-cache"
  ],
  // Put build artifacts in this folder.
  "build_dir": "build",
  // Path to the final binary, relative to the build folder.
  "binary": "main",
  // List of dependencies.
  // For each entry in this list,
  //   `pkg-config --cflags {lib}` will be invoked to get the cflags and
  //   `pkg-config --libs {lib}` will be invoked to get the ldflags.
  // Run `pkg-config --list-all` to see libraries available to in your system.
  "dependencies": []
}