 Stallman wrote a new C front end for the Livermore compiler, but then realized that it required megabytes of stack space, an impossibility on a 68000 Unix system with only 64 KB, and concluded he would have to write a new compiler from scratch.None of the Pastel compiler code ended up in GCC, though Stallman did use the C front end he had written.GCC was first released March 22, 1987, available by FTP from MIT.