Hi vsdeepthi, > I want to preprocess the file but suppress macro expansion. Is this > possible using gcc? Short answer: no. Long answer: yes, you have access to the GCC source code and you could munge that to make it do what you want. > I have tried "gcc -fdirectives_only -E" and "gcc -fpreprocessed -E". > Any inputs? You'll have to write your own preprocessor. Fortunately, there is a C/C++ preprocessor called Wave already written by Hartmut Kaiser using Boost Spirit that you could use as a starting point and customize from there. http://spirit.sourceforge.net/repository/applications/wave.html Boost Spirit is a EBNF-like representation in C++. (Technically it is an object oriented recursive descent parser generator framework implemented using template meta-programming techniques. The C++ alternative to using flex/bison or lex/yacc.) http://www.boost.org/libs/spirit/ Boost is a grab bag of incredible enhancements to the Standard C++ Library. http://www.boost.org/ HTH, --Eljay
