1 \input texinfo @c -*-texinfo-*-
3 @setfilename gccint.info
4 @c INTERNALS is used by md.texi to determine whether to include the
5 @c whole of that file, in the internals manual, or only the part
6 @c dealing with constraints, in the user manual.
9 @c See miscellaneous notes in gcc.texi on checks/things to do.
11 @include gcc-common.texi
13 @settitle GNU Compiler Collection (GCC) Internals
15 @c Create a separate index for command line options.
17 @c Merge the standard indexes into a single one.
29 Copyright @copyright{} 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
30 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007,
31 2008 Free Software Foundation, Inc.
33 Permission is granted to copy, distribute and/or modify this document
34 under the terms of the GNU Free Documentation License, Version 1.2 or
35 any later version published by the Free Software Foundation; with the
36 Invariant Sections being ``Funding Free Software'', the Front-Cover
37 Texts being (a) (see below), and with the Back-Cover Texts being (b)
38 (see below). A copy of the license is included in the section entitled
39 ``GNU Free Documentation License''.
41 (a) The FSF's Front-Cover Text is:
45 (b) The FSF's Back-Cover Text is:
47 You have freedom to copy and modify this GNU Manual, like GNU
48 software. Copies published by the Free Software Foundation raise
49 funds for GNU development.
52 @dircategory Software development
54 * gccint: (gccint). Internals of the GNU Compiler Collection.
56 This file documents the internals of the GNU compilers.
62 @setchapternewpage odd
64 @title GNU Compiler Collection Internals
66 @author Richard M. Stallman and the @sc{GCC} Developer Community
68 @vskip 0pt plus 1filll
75 @node Top, Contributing,, (DIR)
79 This manual documents the internals of the GNU compilers, including
80 how to port them to new targets and some information about how to
81 write front ends for new languages. It corresponds to the compilers
82 @ifset VERSION_PACKAGE
83 @value{VERSION_PACKAGE}
85 version @value{version-GCC}. The use of the GNU compilers is documented in a
86 separate manual. @xref{Top,, Introduction, gcc, Using the GNU
87 Compiler Collection (GCC)}.
89 This manual is mainly a reference manual rather than a tutorial. It
90 discusses how to contribute to GCC (@pxref{Contributing}), the
91 characteristics of the machines supported by GCC as hosts and targets
92 (@pxref{Portability}), how GCC relates to the ABIs on such systems
93 (@pxref{Interface}), and the characteristics of the languages for
94 which GCC front ends are written (@pxref{Languages}). It then
95 describes the GCC source tree structure and build system, some of the
96 interfaces to GCC front ends, and how support for a target system is
99 Additional tutorial information is linked to from
100 @uref{http://gcc.gnu.org/readings.html}.
103 * Contributing:: How to contribute to testing and developing GCC.
104 * Portability:: Goals of GCC's portability features.
105 * Interface:: Function-call interface of GCC output.
106 * Libgcc:: Low-level runtime library used by GCC.
107 * Languages:: Languages for which GCC front ends are written.
108 * Source Tree:: GCC source tree structure and build system.
109 * Options:: Option specification files.
110 * Passes:: Order of passes, what they do, and what each file is for.
111 * Trees:: The source representation used by the C and C++ front ends.
112 * GENERIC:: Language-independent representation generated by Front Ends
113 * GIMPLE:: Tuple representation used by Tree SSA optimizers
114 * Tree SSA:: Analysis and optimization of GIMPLE
115 * RTL:: Machine-dependent low-level intermediate representation.
116 * Control Flow:: Maintaining and manipulating the control flow graph.
117 * Loop Analysis and Representation:: Analysis and representation of loops
118 * Machine Desc:: How to write machine description instruction patterns.
119 * Target Macros:: How to write the machine description C macros and functions.
120 * Host Config:: Writing the @file{xm-@var{machine}.h} file.
121 * Fragments:: Writing the @file{t-@var{target}} and @file{x-@var{host}} files.
122 * Collect2:: How @code{collect2} works; how it finds @code{ld}.
123 * Header Dirs:: Understanding the standard header file directories.
124 * Type Information:: GCC's memory management; generating type information.
125 * Plugins:: Extending the compiler with plugins.
127 * Funding:: How to help assure funding for free software.
128 * GNU Project:: The GNU Project and GNU/Linux.
130 * Copying:: GNU General Public License says
131 how you can copy and share GCC.
132 * GNU Free Documentation License:: How you can copy and share this manual.
133 * Contributors:: People who have contributed to GCC.
135 * Option Index:: Index to command line options.
136 * Concept Index:: Index of concepts and symbol names.
139 @include contribute.texi
140 @include portability.texi
141 @include interface.texi
143 @include languages.texi
144 @include sourcebuild.texi
145 @include options.texi
149 @include generic.texi
151 @include tree-ssa.texi
156 @include hostconfig.texi
157 @include fragments.texi
158 @include collect2.texi
159 @include headerdirs.texi
161 @include plugins.texi
163 @include funding.texi
167 @c ---------------------------------------------------------------------
169 @c ---------------------------------------------------------------------
173 @include contrib.texi
175 @c ---------------------------------------------------------------------
177 @c ---------------------------------------------------------------------
180 @unnumbered Option Index
182 GCC's command line options are indexed here without any initial @samp{-}
183 or @samp{--}. Where an option has both positive and negative forms
184 (such as @option{-f@var{option}} and @option{-fno-@var{option}}),
185 relevant entries in the manual are indexed under the most appropriate
186 form; it may sometimes be useful to look up both forms.
191 @unnumbered Concept Index
195 @c ---------------------------------------------------------------------
197 @c ---------------------------------------------------------------------