LIB_SOCKET_NSL
, 
, 
, 

2005-09-06

Russ Allbery <rra@stanford.edu> Stepan Kasal <kasal@ucw.cz> Warren Young <warren@etr-usa.com>

AllPermissive
Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright notice and this notice are preserved. Users of this software should generally follow the principles of the MIT License includings its disclaimer.

cryp.to ac-archive's Miscellaneous (released)

This macro figures out what libraries are required on this platform to link sockets programs.

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().

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])])
])