Mercurial > hg > CbC > CbC_gcc
annotate gcc/doc/frontends.texi @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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rev | line source |
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145 | 1 @c Copyright (C) 1988-2020 Free Software Foundation, Inc. |
0 | 2 @c This is part of the GCC manual. |
3 @c For copying conditions, see the file gcc.texi. | |
4 | |
5 @node G++ and GCC | |
6 @chapter Programming Languages Supported by GCC | |
7 | |
8 @cindex GCC | |
9 @cindex GNU Compiler Collection | |
10 @cindex GNU C Compiler | |
11 @cindex Ada | |
145 | 12 @cindex D |
0 | 13 @cindex Fortran |
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f6334be47118
update gcc from gcc-4.6-20100522 to gcc-4.6-20110318
nobuyasu <dimolto@cr.ie.u-ryukyu.ac.jp>
parents:
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changeset
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14 @cindex Go |
0 | 15 @cindex Objective-C |
16 @cindex Objective-C++ | |
17 GCC stands for ``GNU Compiler Collection''. GCC is an integrated | |
18 distribution of compilers for several major programming languages. These | |
111 | 19 languages currently include C, C++, Objective-C, Objective-C++, |
145 | 20 Fortran, Ada, D, Go, and BRIG (HSAIL). |
0 | 21 |
22 The abbreviation @dfn{GCC} has multiple meanings in common use. The | |
23 current official meaning is ``GNU Compiler Collection'', which refers | |
24 generically to the complete suite of tools. The name historically stood | |
25 for ``GNU C Compiler'', and this usage is still common when the emphasis | |
26 is on compiling C programs. Finally, the name is also used when speaking | |
27 of the @dfn{language-independent} component of GCC: code shared among the | |
28 compilers for all supported languages. | |
29 | |
30 The language-independent component of GCC includes the majority of the | |
31 optimizers, as well as the ``back ends'' that generate machine code for | |
32 various processors. | |
33 | |
34 @cindex COBOL | |
35 @cindex Mercury | |
36 The part of a compiler that is specific to a particular language is | |
37 called the ``front end''. In addition to the front ends that are | |
38 integrated components of GCC, there are several other front ends that | |
131 | 39 are maintained separately. These support languages such as |
0 | 40 Mercury, and COBOL@. To use these, they must be built together with |
41 GCC proper. | |
42 | |
43 @cindex C++ | |
44 @cindex G++ | |
45 @cindex Ada | |
46 @cindex GNAT | |
47 Most of the compilers for languages other than C have their own names. | |
48 The C++ compiler is G++, the Ada compiler is GNAT, and so on. When we | |
49 talk about compiling one of those languages, we might refer to that | |
50 compiler by its own name, or as GCC@. Either is correct. | |
51 | |
52 @cindex compiler compared to C++ preprocessor | |
53 @cindex intermediate C version, nonexistent | |
54 @cindex C intermediate output, nonexistent | |
55 Historically, compilers for many languages, including C++ and Fortran, | |
56 have been implemented as ``preprocessors'' which emit another high | |
57 level language such as C@. None of the compilers included in GCC are | |
58 implemented this way; they all generate machine code directly. This | |
59 sort of preprocessor should not be confused with the @dfn{C | |
60 preprocessor}, which is an integral feature of the C, C++, Objective-C | |
61 and Objective-C++ languages. |