Example configuration: IBM AIX systems at LLNL

On AIX systems we recommend using the Gnu based compilers, which are not typically the system default. At LLNL frontend scripts are provided that automatically link the proper MPI libraries in when used with the Gnu compilers, so configuration is relatively simple as in the following examples:

./configure --with-compilers=gnu

Similarly, to configure an optimized executable

./configure --with-compilers=gnu --with-opt=2 --with-dbc=none

If you are trying to build on an AIX system other than those at LLNL, you will likely have to build your own versions of these frontend scripts appropriate for your system. The simplest method to do this is examine what the default MPI compilers are doing (by running mpcc -v and mpCC -v for example), and emulating that substituting in the compiler of your choice. There are examples of such scripts in the spheral/src/helpers directory (see mpg++-aix and mpgcc-aix.