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<a name="Having-GDB-Infer-the-Source-Language"></a>
<h4 class="subsection">15.1.3 Having <small>GDB</small> Infer the Source Language</h4>

<p>To have <small>GDB</small> set the working language automatically, use
&lsquo;<samp>set language local</samp>&rsquo; or &lsquo;<samp>set language auto</samp>&rsquo;.  <small>GDB</small>
then infers the working language.  That is, when your program stops in a
frame (usually by encountering a breakpoint), <small>GDB</small> sets the
working language to the language recorded for the function in that
frame.  If the language for a frame is unknown (that is, if the function
or block corresponding to the frame was defined in a source file that
does not have a recognized extension), the current working language is
not changed, and <small>GDB</small> issues a warning.
</p>
<p>This may not seem necessary for most programs, which are written
entirely in one source language.  However, program modules and libraries
written in one source language can be used by a main program written in
a different source language.  Using &lsquo;<samp>set language auto</samp>&rsquo; in this
case frees you from having to set the working language manually.
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