I'm using the C++ preprocessor (g++ -E) to partially preprocess a C++ header file. The preprocessor output documentation (http://gcc.gnu.org/onlinedocs/gcc-4.6.2/cpp/Preprocessor-Output.html#Preprocessor-Output) states: Long runs of blank lines are discarded. Rather than have long runs of blank lines discarded, I would prefer that runs of two or more blank lines be replaced by single blank line or be left as is. Does anyone know of a way to accomplish either of these? Thanks, Geoff Alexander