7.6.1.2 Preprocessor

  • -nostdinc

    Do not search the standard system directories for header files. Only the directories specified with -I options (and the directory of the current file, if appropriate) are searched.

  • -E

    Stop after the preprocessing stage; do not run the compiler properly. The output is of preprocessed source code, sent to the standard output. Input files, which don't require preprocessing, are ignored.