From 0605e10c503e5ed092fab4fa4707cae0acecd17c Mon Sep 17 00:00:00 2001
From: Markus Armbruster <armbru@pond.sub.org>
Date: Sat, 4 Mar 2006 06:55:12 +0000
Subject: [PATCH] Check for -lws2_32 properly.  The old code relied on
 $host_os, which wasn't defined.

---
 src/client/configure.ac | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/client/configure.ac b/src/client/configure.ac
index 463dbb69..360674a9 100644
--- a/src/client/configure.ac
+++ b/src/client/configure.ac
@@ -49,14 +49,20 @@ AC_PROG_INSTALL
 
 
 ### Checks for libraries.
-LIB_SOCKET_NSL
 AC_SEARCH_LIBS([setupterm], [termlib termcap])
+LIB_SOCKET_NSL
 # TODO merge this into LIB_SOCKET_NSL?
-case "$host_os" in
-*mingw32)
-    LIBS="-lws2_32 $LIBS" ;;
-esac
-
+if test "$ac_cv_search_gethostbyname" = no; then
+    dnl Can't search ws2_32 for gethostbyname using AC_SEARCH_LIBS, because
+    dnl it requires #include <winsocks2.h> to work.
+    AC_MSG_CHECKING([for gethostbyname in -lws2_32])
+    save_LIBS=$LIBS
+    LIBS="-lws2_32 $LIBS"
+    AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <winsock2.h>]],
+				    [[gethostbyname ("");]])],
+		   [ws2_res=yes], [LIBS=save_LIBS ws2_res=no])
+    AC_MSG_RESULT([$ws2_res])
+fi
 
 ### Checks for header files.