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# hostent.m4 serial 2
dnl Copyright (C) 2008, 2010-2017 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.
AC_DEFUN([gl_HOSTENT],
[
dnl Where are gethostent(), sethostent(), endhostent(), gethostbyname(),
dnl gethostbyaddr() defined?
dnl - On Solaris, they are in libnsl. Ignore libxnet.
dnl - On Haiku, they are in libnetwork.
dnl - On BeOS, they are in libnet.
dnl - On native Windows, they are in ws2_32.dll.
dnl - Otherwise they are in libc.
AC_REQUIRE([gl_HEADER_SYS_SOCKET])dnl for HAVE_SYS_SOCKET_H, HAVE_WINSOCK2_H
HOSTENT_LIB=
gl_saved_libs="$LIBS"
AC_SEARCH_LIBS([gethostbyname], [nsl network net],
[if test "$ac_cv_search_gethostbyname" != "none required"; then
HOSTENT_LIB="$ac_cv_search_gethostbyname"
fi])
LIBS="$gl_saved_libs"
if test -z "$HOSTENT_LIB"; then
AC_CHECK_FUNCS([gethostbyname], , [
AC_CACHE_CHECK([for gethostbyname in winsock2.h and -lws2_32],
[gl_cv_w32_gethostbyname],
[gl_cv_w32_gethostbyname=no
gl_save_LIBS="$LIBS"
LIBS="$LIBS -lws2_32"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[
#ifdef HAVE_WINSOCK2_H
#include <winsock2.h>
#endif
#include <stddef.h>
]],
[[gethostbyname(NULL);]])],
[gl_cv_w32_gethostbyname=yes])
LIBS="$gl_save_LIBS"
])
if test "$gl_cv_w32_gethostbyname" = "yes"; then
HOSTENT_LIB="-lws2_32"
fi
])
fi
AC_SUBST([HOSTENT_LIB])
])
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