GCC is the GNU Compiler Collection. It's the de facto standard C compiler on Linux and older versions of OS X.
GCC is the GNU Compiler Collection, a framework of free software compilers, and is the de facto standard C compiler on Linux and older versions of OS X. It can compile various source languages: C, C++, Fortran, Java and Ada natively; Pascal, Mercury, COBOL, Modula-2, PL/I and UPC via external frontends.