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<title>Using the GNU Compiler Collection (GCC)</title>
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<h3 class="section">Compiling C++ Programs</h3>
<p>C++ source files conventionally use one of the suffixes <code>.C</code>,
<code>.cc</code>, <code>.cpp</code>, <code>.c++</code>, <code>.cp</code>, or <code>.cxx</code>;
preprocessed C++ files use the suffix <code>.ii</code>. 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>However, C++ programs often require class libraries as well as a
compiler that understands the C++ language--and under some
circumstances, you might want to compile programs from standard input,
or otherwise without a suffix that flags them as C++ programs.
<code>g++</code> is a program that calls GCC with the default language
set to C++, and automatically specifies linking against the C++
library. On many systems, <code>g++</code> is also
installed with the name <code>c++</code>.
<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%20Dialect%20Options">Options Controlling C Dialect</a>, for
explanations of options for languages related to C.
See <a href="C---Dialect-Options.html#C++%20Dialect%20Options">Options Controlling C++ Dialect</a>, for
explanations of options that are meaningful only for C++ programs.
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