Compiling

Makefile

The configuration script creates a Makefile in the top-level directory, and you can build the code using standard make tools. Before building the code, it is strongly recommended that any stale or temporary files created by previous compilations be cleaned up.

> make clean

Then simply,

> make

Depending on the compiler and level of optimization, the compilation may take a while. You can speed it up using parallel make

> make -j

This process creates the executable bin/athena.

Modifying the Makefile

On some machines, compilers may have different names, or may have different options. For example, on some Cray systems, 'CC' is used no matter which compiler environment is selected. In this case, the Makefile may be edited accordingly.

For best performance

On Intel-based systems, we strongly recommend use of the Intel C++ Compiler suite (icc, version 15 or later) because it results in a significantly faster executable than other compilers. If you want to try more aggressive optimization, try the "-fast" option. Also, static linking (-static) may improve the performance of highly parallel simulations.