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Autoconf Macro: lib_socket_nsl
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<h1>
lib_socket_nsl
</h1>
<h2>
Synopsis
</h2>
<p class="indent" style="white-space:nowrap;">
<code>LIB_SOCKET_NSL</code>
</p>
<h2>
Description
</h2>
<div class="indent">
<p>
This macro figures out what libraries are required on this platform to link
sockets programs.
</p>
<p>
The common cases are not to need any extra libraries, or to need -lsocket
and -lnsl. We need to avoid linking with libnsl unless we need it, though,
since on some OSes where it isn't necessary it will totally break
networking. Unisys also includes gethostbyname() in libsocket but needs
libnsl for socket().
</p>
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<h2>
Authors
</h2>
<p class="indent">
Russ Allbery <rra@stanford.edu>, Stepan Kasal <kasal@ucw.cz>,
and Warren Young <warren@etr-usa.com>.
</p>
<h2>
Last Modified
</h2>
<p class="indent">
2005-09-06
</p>
<h2>
M4 Source Code
</h2>
<div class="indent">
<pre class="m4source">
AC_DEFUN([LIB_SOCKET_NSL],
[
AC_SEARCH_LIBS([gethostbyname], [nsl])
AC_SEARCH_LIBS([socket], [socket], [], [
AC_CHECK_LIB([socket], [socket], [LIBS="-lsocket -lnsl $LIBS"],
[], [-lnsl])])
])
</pre>
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<h2>
License
</h2>
<div class="indent">
<span style="white-space:nowrap;">Copyright © 2005 Russ Allbery
<rra@stanford.edu></span><br>
<span style="white-space:nowrap;">Copyright © 2005 Stepan Kasal
<kasal@ucw.cz></span><br>
<span style="white-space:nowrap;">Copyright © 2005 Warren Young
<warren@etr-usa.com></span>
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Copying and distribution of this file, with or without modification, are
permitted in any medium without royalty provided the copyright notice and
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