This directory contains the files needed to generate an O3 optimized executable with g++ that can be used with valgrind it includes the option -DNOINIT =========================== run valgrind with option --leak-check=full as in valgrind --leak-check=full ./cloudy.exe < test.in > test.out The default setup in this directory will use the g++ compiler. To use a different compiler, add a line like the following to the file Makefile.conf in this directory: CXX = icc This example would use the Intel compiler. =========================== if you receive the error #error "This g++ version cannot compile Cloudy and must not be used!" it is because you have version 2.96 or 3.4 of g++. These versions cannot produce a valid executable. Update to a more recent version of the compiler.