This directory contains the files needed to generate an optimized executable with the Sun Studio compiler. The -Yl,/usr/bin flag is needed to work around an incompatibility between the (modified) linker supplied by Sun and the object file format in recent Linux distributions. It is only needed on 64-bit systems. See the bug report here http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6533627 for further details. ------------------------ to build enter make at the command prompt