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| <title>Using the GNU Compiler Collection (GCC): G++ and GCC</title> |
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| <a name="G_002b_002b-and-GCC"></a> |
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| Next: <a href="Standards.html#Standards" accesskey="n" rel="next">Standards</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Programming-Languages-Supported-by-GCC"></a> |
| <h2 class="chapter">1 Programming Languages Supported by GCC</h2> |
| |
| <a name="index-GCC"></a> |
| <a name="index-GNU-Compiler-Collection"></a> |
| <a name="index-GNU-C-Compiler"></a> |
| <a name="index-Ada"></a> |
| <a name="index-Fortran"></a> |
| <a name="index-Go"></a> |
| <a name="index-Java"></a> |
| <a name="index-Objective_002dC"></a> |
| <a name="index-Objective_002dC_002b_002b"></a> |
| <p>GCC stands for “GNU Compiler Collection”. GCC is an integrated |
| distribution of compilers for several major programming languages. These |
| languages currently include C, C++, Objective-C, Objective-C++, Java, |
| Fortran, Ada, and Go. |
| </p> |
| <p>The abbreviation <em>GCC</em> has multiple meanings in common use. The |
| current official meaning is “GNU Compiler Collection”, which refers |
| generically to the complete suite of tools. The name historically stood |
| for “GNU C Compiler”, and this usage is still common when the emphasis |
| is on compiling C programs. Finally, the name is also used when speaking |
| of the <em>language-independent</em> component of GCC: code shared among the |
| compilers for all supported languages. |
| </p> |
| <p>The language-independent component of GCC includes the majority of the |
| optimizers, as well as the “back ends” that generate machine code for |
| various processors. |
| </p> |
| <a name="index-COBOL"></a> |
| <a name="index-Mercury"></a> |
| <a name="index-Pascal"></a> |
| <p>The part of a compiler that is specific to a particular language is |
| called the “front end”. In addition to the front ends that are |
| integrated components of GCC, there are several other front ends that |
| are maintained separately. These support languages such as Pascal, |
| Mercury, and COBOL. To use these, they must be built together with |
| GCC proper. |
| </p> |
| <a name="index-C_002b_002b"></a> |
| <a name="index-G_002b_002b"></a> |
| <a name="index-Ada-1"></a> |
| <a name="index-GNAT"></a> |
| <p>Most of the compilers for languages other than C have their own names. |
| The C++ compiler is G++, the Ada compiler is GNAT, and so on. When we |
| talk about compiling one of those languages, we might refer to that |
| compiler by its own name, or as GCC. Either is correct. |
| </p> |
| <a name="index-compiler-compared-to-C_002b_002b-preprocessor"></a> |
| <a name="index-intermediate-C-version_002c-nonexistent"></a> |
| <a name="index-C-intermediate-output_002c-nonexistent"></a> |
| <p>Historically, compilers for many languages, including C++ and Fortran, |
| have been implemented as “preprocessors” which emit another high |
| level language such as C. None of the compilers included in GCC are |
| implemented this way; they all generate machine code directly. This |
| sort of preprocessor should not be confused with the <em>C |
| preprocessor</em>, which is an integral feature of the C, C++, Objective-C |
| and Objective-C++ languages. |
| </p> |
| <hr> |
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| Next: <a href="Standards.html#Standards" accesskey="n" rel="next">Standards</a>, Up: <a href="index.html#Top" accesskey="u" rel="up">Top</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="Option-Index.html#Option-Index" title="Index" rel="index">Index</a>]</p> |
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