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This manual documents the internals of the GNU compilers, including how to port them to new targets and some information about how to write front ends for new languages. It corresponds to GCC version 3.2. The use of the GNU compilers is documented in a separate manual. See section `Introduction' in Using the GNU Compiler Collection (GCC).
This manual is mainly a reference manual rather than a tutorial. It discusses how to contribute to GCC (see section 1. Contributing to GCC Development), the characteristics of the machines supported by GCC as hosts and targets (see section 2. GCC and Portability), how GCC relates to the ABIs on such systems (see section 3. Interfacing to GCC Output), and the characteristics of the languages for which GCC front ends are written (see section 4. Language Front Ends in GCC). It then describes the GCC source tree structure and build system, some of the interfaces to GCC front ends, and how support for a target system is implemented in GCC.
Additional tutorial information is linked to from http://gcc.gnu.org/readings.html.
1. Contributing to GCC Development How to contribute to testing and developing GCC. 2. GCC and Portability Goals of GCC's portability features. 3. Interfacing to GCC Output Function-call interface of GCC output. 4. Language Front Ends in GCC Languages for which GCC front ends are written. 5. Source Tree Structure and Build System GCC source tree structure and build system. 6. Passes and Files of the Compiler Order of passes, what they do, and what each file is for. 7. Trees: The intermediate representation used by the C and C++ front ends The source representation used by the C and C++ front ends. 8. RTL Representation The intermediate representation that most passes work on. 9. Machine Descriptions How to write machine description instruction patterns. 10. Target Description Macros and Functions How to write the machine description C macros and functions. 11. Host Configuration Headers Writing the `xm-machine.h' file. 12. Makefile Fragments Writing the `t-target' and `x-host' files. 13.
collect2works; how it finds
14. Standard Header File Directories Understanding the standard header file directories.
Funding Free Software How to help assure funding for free software. The GNU Project and GNU/Linux
GNU GENERAL PUBLIC LICENSE GNU General Public License says how you can copy and share GCC. GNU Free Documentation License How you can copy and share this manual. Contributors to GCC People who have contributed to GCC.
Option Index Index to command line options. Index Index of concepts and symbol names.
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