Basically you need the gcc compiler (or an equivalent like clang with it's gcc frontend`).

On Mac OS X:

• You need to install Xcode with the Xcode command-line tools

On Ubuntu/debian Linux:

$ apt install build-essential gcc-multilib

On FreeBSD, it already comes with a compiler, but you will need gmake to build the examples in the repository:

$ sudo pkg install gmake

On Windows:

• Install the MinGW toolset

Once you've completed installation run the following to check you can access the required tools:

$ gcc --version
$ objdump --version

If you get output from both tools you are good to go.