Use more generic check for OpenBSD.
--- buildtools/wafsamba/samba_autoconf.py.orig	Sat May 11 12:20:52 2013
+++ buildtools/wafsamba/samba_autoconf.py	Sat May 11 13:04:26 2013
@@ -776,9 +797,9 @@ def SETUP_CONFIGURE_CACHE(conf, enable):
 def SAMBA_CHECK_UNDEFINED_SYMBOL_FLAGS(conf):
     # we don't want any libraries or modules to rely on runtime
     # resolution of symbols
-    if sys.platform != "openbsd4" and sys.platform != "openbsd5":
+    if not sys.platform.startswith("openbsd"):
         conf.env.undefined_ldflags = conf.ADD_LDFLAGS('-Wl,-no-undefined', testflags=True)
 
-    if sys.platform != "openbsd4" and sys.platform != "openbsd5" and conf.env.undefined_ignore_ldflags == []:
+    if not sys.platform.startswith("openbsd") and conf.env.undefined_ignore_ldflags == []:
         if conf.CHECK_LDFLAGS(['-undefined', 'dynamic_lookup']):
             conf.env.undefined_ignore_ldflags = ['-undefined', 'dynamic_lookup']
--- lib/ldb/wscript.orig	Wed May 15 22:54:13 2013
+++ lib/ldb/wscript	Thu May 16 14:54:31 2013
@@ -64,7 +64,7 @@ def configure(conf):
 
         # we don't want any libraries or modules to rely on runtime
         # resolution of symbols
-        if sys.platform != "openbsd4" and sys.platform != "openbsd5":
+        if not sys.platform.startswith("openbsd"):
             conf.ADD_LDFLAGS('-Wl,-no-undefined', testflags=True)
 
     conf.DEFINE('HAVE_CONFIG_H', 1, add_to_cflags=True)
--- source3/wscript.orig	Sat May 11 13:11:06 2013
+++ source3/wscript	Sat May 11 13:11:12 2013
@@ -68,7 +68,7 @@ def configure(conf):
     if Options.options.with_swat:
         conf.env['build_swat'] = True
 
-    if sys.platform != 'openbsd5':
+    if not sys.platform.startswith('openbsd'):
         conf.ADD_LDFLAGS("-Wl,--export-dynamic", testflags=True)
 
     conf.CHECK_HEADERS('execinfo.h libexc.h libunwind.h netdb.h')
BUG: https://bugzilla.samba.org/show_bug.cgi?id=9888
--- wscript.orig	Sat May 11 13:14:18 2013
+++ wscript	Sat May 11 13:14:23 2013
@@ -151,7 +151,7 @@ def configure(conf):
     # allows us to find problems on our development hosts faster.
     # It also results in faster load time.
 
-    if sys.platform != "openbsd4":
+    if not sys.platform.startswith("openbsd"):
         conf.env.asneeded_ldflags = conf.ADD_LDFLAGS('-Wl,--as-needed', testflags=True)
 
     if not conf.CHECK_NEED_LC("-lc not needed"):