# How to build from source

## Requirements

### Common requirements

In order to build cmocka, you need to install several components:

- A C compiler
- [CMake](http://www.cmake.org) >= 2.8.0.

Note that these version numbers are version we know works correctly. If you
build and run cmocka successfully with an older version, please let us know.

## Building
First, you need to configure the compilation, using CMake. Go inside the
`build` dir. Create it if it doesn't exist.

GNU/Linux, MacOS X, MSYS/MinGW:

    cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug ..
    make

On Windows you should choose a makefile gernerator with -G, for example:

   cmake -G "Visual Studio 12 2013" -DCMAKE_BUILD_TYPE=Debug /path/to/source

You can also use the CMake GUI which is shipped with CMake. It will list all
available generators for MSVC on Windows.

### CMake standard options
Here is a list of the most interesting options provided out of the box by
CMake.

- CMAKE_BUILD_TYPE:     The type of build (can be Debug Release MinSizeRel
                        RelWithDebInfo)
- CMAKE_INSTALL_PREFIX: The prefix to use when running make install (Default
                        to /usr/local on GNU/Linux and MacOS X)
- CMAKE_C_COMPILER:     The path to the C compiler
- CMAKE_CXX_COMPILER:   The path to the C++ compiler

### CMake options defined for cmocka

Options are defined in the following files:

- DefineOptions.cmake

They can be changed with the -D option:

`cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug -DUNIT_TESTING=ON ..`

### Browsing/editing CMake options

In addition to passing options on the command line, you can browse and edit
CMake options using `cmakesetup` (Windows), `cmake-gui` or `ccmake` (GNU/Linux
and MacOS X).

- Go to the build dir
- On Windows: run `cmakesetup`
- On GNU/Linux and MacOS X: run `ccmake ..`

## Installing

If you want to install cmocka after compilation run:

    make install

## Running

The cmocka library can be found in the `build/src` directory.
You can run the binaries in `build/examples/*` which is a
are exsample tests.

## Testing

As mention above you can turn on the unit tests and make it possible to easily
execute them:

`cmake -DCMAKE_BUILD_TYPE=Debug -DUNIT_TESTING=ON ..`

After that you can simply call `make test` in the build directory or if you
want more output simply call `ctest -V`.

If you want to enable the generation of coverage files you can do this by
using the following options:

`cmake -DCMAKE_BUILD_TYPE=Profiling -DUNIT_TESTING=ON ..`

After building it you will see that you have several coverage options in

`make help`

You should have `make ExperimentalCoverage` and running it will create
coverage files. The result is stored in Testing directory.

## About this document

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