Mercurial > hg > CbC > CbC_gcc
annotate gcc/doc/frontends.texi @ 67:f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
| author | nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Tue, 22 Mar 2011 17:18:12 +0900 |
| parents | a06113de4d67 |
| children | 04ced10e8804 |
| rev | line source |
|---|---|
| 0 | 1 @c Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998, |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
2 @c 1999, 2000, 2001, 2002, 2004, 2008, 2010 Free Software Foundation, Inc. |
| 0 | 3 @c This is part of the GCC manual. |
| 4 @c For copying conditions, see the file gcc.texi. | |
| 5 | |
| 6 @node G++ and GCC | |
| 7 @chapter Programming Languages Supported by GCC | |
| 8 | |
| 9 @cindex GCC | |
| 10 @cindex GNU Compiler Collection | |
| 11 @cindex GNU C Compiler | |
| 12 @cindex Ada | |
| 13 @cindex Fortran | |
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67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
14 @cindex Go |
| 0 | 15 @cindex Java |
| 16 @cindex Objective-C | |
| 17 @cindex Objective-C++ | |
| 18 GCC stands for ``GNU Compiler Collection''. GCC is an integrated | |
| 19 distribution of compilers for several major programming languages. These | |
| 20 languages currently include C, C++, Objective-C, Objective-C++, Java, | |
|
67
f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
0
diff
changeset
|
21 Fortran, Ada, and Go. |
| 0 | 22 |
| 23 The abbreviation @dfn{GCC} has multiple meanings in common use. The | |
| 24 current official meaning is ``GNU Compiler Collection'', which refers | |
| 25 generically to the complete suite of tools. The name historically stood | |
| 26 for ``GNU C Compiler'', and this usage is still common when the emphasis | |
| 27 is on compiling C programs. Finally, the name is also used when speaking | |
| 28 of the @dfn{language-independent} component of GCC: code shared among the | |
| 29 compilers for all supported languages. | |
| 30 | |
| 31 The language-independent component of GCC includes the majority of the | |
| 32 optimizers, as well as the ``back ends'' that generate machine code for | |
| 33 various processors. | |
| 34 | |
| 35 @cindex COBOL | |
| 36 @cindex Mercury | |
| 37 @cindex Pascal | |
| 38 The part of a compiler that is specific to a particular language is | |
| 39 called the ``front end''. In addition to the front ends that are | |
| 40 integrated components of GCC, there are several other front ends that | |
| 41 are maintained separately. These support languages such as Pascal, | |
| 42 Mercury, and COBOL@. To use these, they must be built together with | |
| 43 GCC proper. | |
| 44 | |
| 45 @cindex C++ | |
| 46 @cindex G++ | |
| 47 @cindex Ada | |
| 48 @cindex GNAT | |
| 49 Most of the compilers for languages other than C have their own names. | |
| 50 The C++ compiler is G++, the Ada compiler is GNAT, and so on. When we | |
| 51 talk about compiling one of those languages, we might refer to that | |
| 52 compiler by its own name, or as GCC@. Either is correct. | |
| 53 | |
| 54 @cindex compiler compared to C++ preprocessor | |
| 55 @cindex intermediate C version, nonexistent | |
| 56 @cindex C intermediate output, nonexistent | |
| 57 Historically, compilers for many languages, including C++ and Fortran, | |
| 58 have been implemented as ``preprocessors'' which emit another high | |
| 59 level language such as C@. None of the compilers included in GCC are | |
| 60 implemented this way; they all generate machine code directly. This | |
| 61 sort of preprocessor should not be confused with the @dfn{C | |
| 62 preprocessor}, which is an integral feature of the C, C++, Objective-C | |
| 63 and Objective-C++ languages. |