diff --git a/erts/emulator/test/driver_SUITE.erl b/erts/emulator/test/driver_SUITE.erl
index 06211406b411..c62bc0c454fc 100644
--- a/erts/emulator/test/driver_SUITE.erl
+++ b/erts/emulator/test/driver_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2013. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2014. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -1945,6 +1945,14 @@ otp_9302(Config) when is_list(Config) ->
 	  end.
 
 thr_free_drv(Config) when is_list(Config) ->
+    case erlang:system_info(threads) of
+	false ->
+	    {skipped, "No thread support"};
+	true ->
+	    thr_free_drv_do(Config)
+    end.
+
+thr_free_drv_do(Config) ->
     ?line Path = ?config(data_dir, Config),
     ?line erl_ddll:start(),
     ?line ok = load_driver(Path, thr_free_drv),
diff --git a/erts/emulator/test/driver_SUITE_data/otp_9302_drv.c b/erts/emulator/test/driver_SUITE_data/otp_9302_drv.c
index 7c144d20cf58..ad29d17f06a6 100644
--- a/erts/emulator/test/driver_SUITE_data/otp_9302_drv.c
+++ b/erts/emulator/test/driver_SUITE_data/otp_9302_drv.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2011-2013. All Rights Reserved.
+ * Copyright Ericsson AB 2011-2014. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -94,7 +94,7 @@ DRIVER_INIT(otp_9302_drv)
 static void stop(ErlDrvData drv_data)
 {
     Otp9302Data *data = (Otp9302Data *) drv_data;
-    if (!data->smp)
+    if (data->msgq.mtx)
 	erl_drv_mutex_destroy(data->msgq.mtx);
     driver_free(data);
 }
@@ -114,13 +114,16 @@ static ErlDrvData start(ErlDrvPort port,
     driver_system_info(&sys_info, sizeof(ErlDrvSysInfo));
     data->smp = sys_info.smp_support;
 
+    data->msgq.mtx = NULL;
     if (!data->smp) {
 	data->msgq.start = NULL;
 	data->msgq.end = NULL;
-	data->msgq.mtx = erl_drv_mutex_create("");
-	if (!data->msgq.mtx) {
-	    driver_free(data);
-	    return ERL_DRV_ERROR_GENERAL;
+	if (sys_info.thread_support) {
+	    data->msgq.mtx = erl_drv_mutex_create("");
+	    if (!data->msgq.mtx) {
+		driver_free(data);
+		return ERL_DRV_ERROR_GENERAL;
+	    }
 	}
     }
 
@@ -143,19 +146,22 @@ static void enqueue_reply(Otp9302AsyncData *adata)
     Otp9302MsgQ *msgq = adata->msgq;
     adata->next = NULL;
     adata->refc++;
-    erl_drv_mutex_lock(msgq->mtx);
+    if (msgq->mtx)
+	erl_drv_mutex_lock(msgq->mtx);
     if (msgq->end)
 	msgq->end->next = adata;
     else
 	msgq->end = msgq->start = adata;
     msgq->end = adata;
-    erl_drv_mutex_unlock(msgq->mtx);
+    if (msgq->mtx)
+	erl_drv_mutex_unlock(msgq->mtx);
 }
 
 static void dequeue_replies(Otp9302AsyncData *adata)
 {
     Otp9302MsgQ *msgq = adata->msgq;
-    erl_drv_mutex_lock(msgq->mtx);
+    if (msgq->mtx)
+	erl_drv_mutex_lock(msgq->mtx);
     if (--adata->refc == 0)
 	driver_free(adata);
     while (msgq->start) {
@@ -166,7 +172,8 @@ static void dequeue_replies(Otp9302AsyncData *adata)
 	    driver_free(adata);
     }
     msgq->start = msgq->end = NULL;
-    erl_drv_mutex_unlock(msgq->mtx);
+    if (msgq->mtx)
+	erl_drv_mutex_unlock(msgq->mtx);
 }
 
 static void async_invoke(void *data)
diff --git a/lib/test_server/src/configure.in b/lib/test_server/src/configure.in
index 067663feb4f3..cd723bcd4d46 100644
--- a/lib/test_server/src/configure.in
+++ b/lib/test_server/src/configure.in
@@ -2,7 +2,7 @@ dnl Process this file with autoconf to produce a configure script for Erlang.
 dnl
 dnl %CopyrightBegin%
 dnl 
-dnl Copyright Ericsson AB 1997-2013. All Rights Reserved.
+dnl Copyright Ericsson AB 1997-2014. All Rights Reserved.
 dnl 
 dnl The contents of this file are subject to the Erlang Public License,
 dnl Version 1.1, (the "License"); you may not use this file except in
@@ -170,7 +170,30 @@ case $system in
 	fi
 	SHLIB_EXTRACT_ALL=""
 	;;
-    *-netbsd*|*-freebsd*|*-openbsd*|*-dragonfly*)
+    *-openbsd*)
+	# Not available on all versions:  check for include file.
+	AC_CHECK_HEADER(dlfcn.h, [
+	    SHLIB_CFLAGS="-fpic"
+	    SHLIB_LD="${CC}"
+	    SHLIB_LDFLAGS="$LDFLAGS -shared"
+	    SHLIB_SUFFIX=".so"
+	    if test X${enable_m64_build} = Xyes; then
+	        AC_MSG_ERROR(don't know how to link 64-bit dynamic drivers)
+	    fi
+	    if test X${enable_m32_build} = Xyes; then
+	        AC_MSG_ERROR(don't know how to link 32-bit dynamic drivers)
+	    fi
+	], [
+	    # No dynamic loading.
+	    SHLIB_CFLAGS=""
+	    SHLIB_LD="ld"
+	    SHLIB_LDFLAGS=""
+	    SHLIB_SUFFIX=""
+	    AC_MSG_ERROR(don't know how to compile and link dynamic drivers)
+	])
+	SHLIB_EXTRACT_ALL=""
+	;;
+    *-netbsd*|*-freebsd*|*-dragonfly*)
 	# Not available on all versions:  check for include file.
 	AC_CHECK_HEADER(dlfcn.h, [
 	    SHLIB_CFLAGS="-fpic"