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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>
</div>
<h2>
Author
</h2>
<p class="indent">
Russ Allbery <rra@stanford.edu>, Stepan Kasal <kasal@ucw.cz>,
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])])
])
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