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<TITLE>Option: extern</TITLE>
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<H2>Option: <font color=#FF0080>extern</font></H2><P>
<A NAME="extern"></A><DT><B><A HREF="extern.html">-extern</A></B> </DT>
<DD>Causes <B>ftnchek </B> to report
whether any subprograms invoked by the program are never defined. Ordinarily,
if <B>ftnchek </B> is being run on a complete program, each subprogram other
than the intrinsic functions should be defined somewhere. Turn off this
switch if you just want to check a subset of files which form part of
a larger complete program. Subprogram arguments will still be checked for
correctness. Default = yes. <blockquote></DD>
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The <B><A HREF="extern.html">-extern</A> </B> flag is now superseded by the
<B><A HREF="usage.html">-usage</A>=ext-undefined </B> option. For the sake of convenience, the <B><A HREF="extern.html">-extern</A> </B> flag
is retained, so that <B>-noextern </B> is equivalent to <B><A HREF="usage.html">-usage</A>=no-ext-undefined </B>
option. The <B><A HREF="extern.html">-extern</A> </B> switch may be retired eventually. <P>
See also: <B><A HREF="library.html">-library</A>
</B>. </blockquote>
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