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# socketlib.m4 serial 1
dnl Copyright (C) 2008-2013 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
dnl with or without modifications, as long as this notice is preserved.
dnl gl_SOCKETLIB
dnl Determines the library to use for socket functions.
dnl Sets and AC_SUBSTs LIBSOCKET.
AC_DEFUN([gl_SOCKETLIB],
[
gl_PREREQ_SYS_H_WINSOCK2 dnl for HAVE_WINSOCK2_H
LIBSOCKET=
if test $HAVE_WINSOCK2_H = 1; then
dnl Native Windows API (not Cygwin).
AC_CACHE_CHECK([if we need to call WSAStartup in winsock2.h and -lws2_32],
[gl_cv_func_wsastartup], [
gl_save_LIBS="$LIBS"
LIBS="$LIBS -lws2_32"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#ifdef HAVE_WINSOCK2_H
# include <winsock2.h>
#endif]], [[
WORD wVersionRequested = MAKEWORD(1, 1);
WSADATA wsaData;
int err = WSAStartup(wVersionRequested, &wsaData);
WSACleanup ();]])],
gl_cv_func_wsastartup=yes, gl_cv_func_wsastartup=no)
LIBS="$gl_save_LIBS"
])
if test "$gl_cv_func_wsastartup" = "yes"; then
AC_DEFINE([WINDOWS_SOCKETS], [1], [Define if WSAStartup is needed.])
LIBSOCKET='-lws2_32'
fi
else
dnl Unix API.
dnl Solaris has most socket functions in libsocket.
dnl Haiku has most socket functions in libnetwork.
dnl BeOS has most socket functions in libnet.
AC_CACHE_CHECK([for library containing setsockopt], [gl_cv_lib_socket], [
gl_cv_lib_socket=
AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
#ifdef __cplusplus
"C"
#endif
char setsockopt();]], [[setsockopt();]])],
[],
[gl_save_LIBS="$LIBS"
LIBS="$gl_save_LIBS -lsocket"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
#ifdef __cplusplus
"C"
#endif
char setsockopt();]], [[setsockopt();]])],
[gl_cv_lib_socket="-lsocket"])
if test -z "$gl_cv_lib_socket"; then
LIBS="$gl_save_LIBS -lnetwork"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
#ifdef __cplusplus
"C"
#endif
char setsockopt();]], [[setsockopt();]])],
[gl_cv_lib_socket="-lnetwork"])
if test -z "$gl_cv_lib_socket"; then
LIBS="$gl_save_LIBS -lnet"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[extern
#ifdef __cplusplus
"C"
#endif
char setsockopt();]], [[setsockopt();]])],
[gl_cv_lib_socket="-lnet"])
fi
fi
LIBS="$gl_save_LIBS"
])
if test -z "$gl_cv_lib_socket"; then
gl_cv_lib_socket="none needed"
fi
])
if test "$gl_cv_lib_socket" != "none needed"; then
LIBSOCKET="$gl_cv_lib_socket"
fi
fi
AC_SUBST([LIBSOCKET])
])
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