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<title>Trouble (Using the GNU Compiler Collection (GCC))</title>

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<a name="Known-Causes-of-Trouble-with-GCC"></a>
<h2 class="chapter">14 Known Causes of Trouble with GCC</h2>
<a name="index-bugs_002c-known"></a>
<a name="index-installation-trouble"></a>
<a name="index-known-causes-of-trouble"></a>

<p>This section describes known problems that affect users of GCC.  Most
of these are not GCC bugs per se&mdash;if they were, we would fix them.
But the result for a user may be like the result of a bug.
</p>
<p>Some of these problems are due to bugs in other software, some are
missing features that are too much work to add, and some are places
where people&rsquo;s opinions differ as to what is best.
</p>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top">&bull; <a href="Actual-Bugs.html#Actual-Bugs" accesskey="1">Actual Bugs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Bugs we will fix later.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Interoperation.html#Interoperation" accesskey="2">Interoperation</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Problems using GCC with other compilers,
                        and with certain linkers, assemblers and debuggers.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Incompatibilities.html#Incompatibilities" accesskey="3">Incompatibilities</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">GCC is incompatible with traditional C.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Fixed-Headers.html#Fixed-Headers" accesskey="4">Fixed Headers</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">GCC uses corrected versions of system header files.
                        This is necessary, but doesn&rsquo;t always work smoothly.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Standard-Libraries.html#Standard-Libraries" accesskey="5">Standard Libraries</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">GCC uses the system C library, which might not be
                        compliant with the ISO C standard.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Disappointments.html#Disappointments" accesskey="6">Disappointments</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Regrettable things we cannot change, but not quite bugs.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="C_002b_002b-Misunderstandings.html#C_002b_002b-Misunderstandings" accesskey="7">C++ Misunderstandings</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Common misunderstandings with GNU C++.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Non_002dbugs.html#Non_002dbugs" accesskey="8">Non-bugs</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Things we think are right, but some others disagree.
</td></tr>
<tr><td align="left" valign="top">&bull; <a href="Warnings-and-Errors.html#Warnings-and-Errors" accesskey="9">Warnings and Errors</a>:</td><td>&nbsp;&nbsp;</td><td align="left" valign="top">Which problems in your code get warnings,
                        and which get errors.
</td></tr>
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