To compile GAMER, go to the source directory:

> cd src

We recommend using the Python script configure.py to tailor the Makefile for your simulation and machine. Alternatively, you can edit Makefile and set the following configurations directly:

1. Simulation Options
2. Compiler and Flags
3. External Libraries

Caution: on macOS, we recommend using the GNU compiler and set RANDOM_NUMBER to RNG_CPP11 in the Makefile (or via --rng=RNG_CPP11 in configure.py).

Compile the code by

> make clean
> make

To reduce the compilation time, you can perform a parallel compilation by make -j N, where N is the number of compilation jobs to run in parallel. For example, the following command will invoke 4 compilation jobs simultaneously:

> make -j 4

However, please consult the documentation of your system to avoid violating the usage policy.

If the compilation succeeds, you will see the following message

> Compiling GAMER --> Successful!

and get an executable gamer, which will be automatically copied to ../bin/gamer.

Caution: the Makefile structure will likely be changed in the near future to become more extensible and maintainable.