Gcc compiler in code composer studio

Ahmet,

The -gcc command line switch enables support for many gcc extensions to C.  I.e. it makes it easier to use code that was written to be used with the gcc compiler with the TI C compiler.

It is also possible to use gcc with CCS.  You can create a project like in the wiki article Lisa pointed to but you can also create a CCS project that uses gcc.  When creating a new project if expand the advanced options you can select gcc.  You may have to hit the more button and point CCS to where your gcc is installed.