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| <title>Using the GNU Compiler Collection (GCC): Invoking G++</title> |
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| Next: <a href="C-Dialect-Options.html#C-Dialect-Options" accesskey="n" rel="next">C Dialect Options</a>, Previous: <a href="Overall-Options.html#Overall-Options" accesskey="p" rel="prev">Overall Options</a>, Up: <a href="Invoking-GCC.html#Invoking-GCC" accesskey="u" rel="up">Invoking GCC</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="Compiling-C_002b_002b-Programs"></a> |
| <h3 class="section">3.3 Compiling C++ Programs</h3> |
| |
| <a name="index-suffixes-for-C_002b_002b-source"></a> |
| <a name="index-C_002b_002b-source-file-suffixes"></a> |
| <p>C++ source files conventionally use one of the suffixes ‘<samp>.C</samp>’, |
| ‘<samp>.cc</samp>’, ‘<samp>.cpp</samp>’, ‘<samp>.CPP</samp>’, ‘<samp>.c++</samp>’, ‘<samp>.cp</samp>’, or |
| ‘<samp>.cxx</samp>’; C++ header files often use ‘<samp>.hh</samp>’, ‘<samp>.hpp</samp>’, |
| ‘<samp>.H</samp>’, or (for shared template code) ‘<samp>.tcc</samp>’; and |
| preprocessed C++ files use the suffix ‘<samp>.ii</samp>’. GCC recognizes |
| files with these names and compiles them as C++ programs even if you |
| call the compiler the same way as for compiling C programs (usually |
| with the name <code>gcc</code>). |
| </p> |
| <a name="index-g_002b_002b"></a> |
| <a name="index-c_002b_002b"></a> |
| <p>However, the use of <code>gcc</code> does not add the C++ library. |
| <code>g++</code> is a program that calls GCC and automatically specifies linking |
| against the C++ library. It treats ‘<samp>.c</samp>’, |
| ‘<samp>.h</samp>’ and ‘<samp>.i</samp>’ files as C++ source files instead of C source |
| files unless <samp>-x</samp> is used. This program is also useful when |
| precompiling a C header file with a ‘<samp>.h</samp>’ extension for use in C++ |
| compilations. On many systems, <code>g++</code> is also installed with |
| the name <code>c++</code>. |
| </p> |
| <a name="index-invoking-g_002b_002b"></a> |
| <p>When you compile C++ programs, you may specify many of the same |
| command-line options that you use for compiling programs in any |
| language; or command-line options meaningful for C and related |
| languages; or options that are meaningful only for C++ programs. |
| See <a href="C-Dialect-Options.html#C-Dialect-Options">Options Controlling C Dialect</a>, for |
| explanations of options for languages related to C. |
| See <a href="C_002b_002b-Dialect-Options.html#C_002b_002b-Dialect-Options">Options Controlling C++ Dialect</a>, for |
| explanations of options that are meaningful only for C++ programs. |
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