gcc: How to ignore standard include paths?

Question

I need to compile some files with a usage of modified versions of standard library headers. With Visual C++ compiler I will do this by usage of /X (Ignore Standard Include Paths) and /I (Additional Include Directories) parameters. How this should be done with gcc?

Answer 1

gcc -nostdinc -I/custom/include/path/goes/here

-nostdinc ignores standard C include directories
-nostdinc++ ignores standard C++ include directories