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Diffstat (limited to 'm4/ax_lib_socket_nsl.m4')
| -rw-r--r-- | m4/ax_lib_socket_nsl.m4 | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/m4/ax_lib_socket_nsl.m4 b/m4/ax_lib_socket_nsl.m4 new file mode 100644 index 0000000000..058e975157 --- /dev/null +++ b/m4/ax_lib_socket_nsl.m4 @@ -0,0 +1,40 @@ +# =========================================================================== +# http://www.gnu.org/software/autoconf-archive/ax_lib_socket_nsl.html +# =========================================================================== +# +# SYNOPSIS +# +# AX_LIB_SOCKET_NSL +# +# DESCRIPTION +# +# 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(). +# +# LICENSE +# +# Copyright (c) 2008 Russ Allbery <rra@stanford.edu> +# Copyright (c) 2008 Stepan Kasal <kasal@ucw.cz> +# Copyright (c) 2008 Warren Young <warren@etr-usa.com> +# +# 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. This file is offered as-is, without any +# warranty. + +#serial 6 + +AU_ALIAS([LIB_SOCKET_NSL], [AX_LIB_SOCKET_NSL]) +AC_DEFUN([AX_LIB_SOCKET_NSL], +[ + AC_SEARCH_LIBS([gethostbyname], [nsl]) + AC_SEARCH_LIBS([socket], [socket], [], [ + AC_CHECK_LIB([socket], [socket], [LIBS="-lsocket -lnsl $LIBS"], + [], [-lnsl])]) +]) |