This is the main architecture document of this series that describes the conceptual structure of GCC. We mainly focus on the non-front end part of GCC, and particularly sharpen the role of RTL in GCC. For instance, the use of RTL in GCC is sharpened to two languages: MD-RTL for specification of target systems, and IR-RTL for internal intermediate representation during compilation.

The implementation of GCC 4.0.2 is described with respect to the conceptual model described above. The goal of this document is to illustrate the application of the above conceptual model to a particular compiler release. In that sense, we do not describe the details exhaustively; instead only those details relevant to exposing the concepts are described.

Some basic information and vocabulary to describe the GCC system and for giving some background. The file organization is described briefly and the GCC build process is described from an user's point of view.

The concepts that go into the development of a GCC Machine Description are described. A fictional target machine is used to develop the concepts. This is a small tutorial on writing machine descriptions in GCC.

There are a few ideas that help in a systematic development of a machine description. This is a PDF of the paper by Prof. Uday Khedker and Sameera Deshpande

A collection of various file level details of the GCC system. Machine description macros and RTL objects are described in detail.

The cross compilation notation and figures. This document aims to bridge the gap between the concepts of cross compilation, and the use of GCC as a cross compiler.