From 5eee0bffeb1cc5f86f26062bad976aa61e06aa52 Mon Sep 17 00:00:00 2001
From: Lionel Ulmer <lionel.ulmer@free.fr>
Date: Fri, 24 Mar 2000 21:20:33 +0000
Subject: [PATCH] Disable OpenGL support if the latter is thread safe.

---
 configure    | 377 ++++++++++++++++++++++++++++-----------------------
 configure.in |  23 +++-
 2 files changed, 229 insertions(+), 171 deletions(-)

diff --git a/configure b/configure
index ae8d9081733..6f4ee7c33e4 100755
--- a/configure
+++ b/configure
@@ -3376,10 +3376,41 @@ fi
 
 echo "$ac_t""$wine_cv_mesa_version_OK" 1>&6
 
-        if test "$wine_cv_mesa_version_OK" = "yes"
+	        echo $ac_n "checking "for thread-safe Mesa version"""... $ac_c" 1>&6
+echo "configure:3381: checking "for thread-safe Mesa version"" >&5
+if eval "test \"`echo '$''{'wine_cv_mesa_version_threadsafe'+set}'`\" = set"; then
+  echo $ac_n "(cached) $ac_c" 1>&6
+else
+  saved_libs=$LIBS
+		        LIBS="$X_LIBS -lGL"
+			cat > conftest.$ac_ext <<EOF
+#line 3388 "configure"
+#include "confdefs.h"
+
+int main() {
+pthread_getspecific();
+; return 0; }
+EOF
+if { (eval echo configure:3395: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+  rm -rf conftest*
+  wine_cv_mesa_version_threadsafe="yes"
+else
+  echo "configure: failed program was:" >&5
+  cat conftest.$ac_ext >&5
+  rm -rf conftest*
+  wine_cv_mesa_version_threadsafe="no"
+fi
+rm -f conftest*
+			LIBS=$saved_libs
+	
+fi
+
+echo "$ac_t""$wine_cv_mesa_version_threadsafe" 1>&6
+
+        if test "$wine_cv_mesa_version_OK" = "yes" -a "$wine_cv_mesa_version_threadsafe" = "no"
         then
 	                echo $ac_n "checking for glXCreateContext in -lGL""... $ac_c" 1>&6
-echo "configure:3383: checking for glXCreateContext in -lGL" >&5
+echo "configure:3414: checking for glXCreateContext in -lGL" >&5
 ac_lib_var=`echo GL'_'glXCreateContext | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3387,7 +3418,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lGL $X_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3391 "configure"
+#line 3422 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3398,7 +3429,7 @@ int main() {
 glXCreateContext()
 ; return 0; }
 EOF
-if { (eval echo configure:3402: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3433: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3424,7 +3455,7 @@ fi
 	    if test "$ac_cv_lib_GL_glXCreateContext" = "no"
 	    then
 		echo $ac_n "checking for glXCreateContext in -lMesaGL""... $ac_c" 1>&6
-echo "configure:3428: checking for glXCreateContext in -lMesaGL" >&5
+echo "configure:3459: checking for glXCreateContext in -lMesaGL" >&5
 ac_lib_var=`echo MesaGL'_'glXCreateContext | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3432,7 +3463,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lMesaGL $X_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3436 "configure"
+#line 3467 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3443,7 +3474,7 @@ int main() {
 glXCreateContext()
 ; return 0; }
 EOF
-if { (eval echo configure:3447: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3478: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3469,19 +3500,19 @@ fi
 	    fi
 
 	    	    echo $ac_n "checking "for the OpenGL Color Index extension"""... $ac_c" 1>&6
-echo "configure:3473: checking "for the OpenGL Color Index extension"" >&5
+echo "configure:3504: checking "for the OpenGL Color Index extension"" >&5
 if eval "test \"`echo '$''{'dummy'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3478 "configure"
+#line 3509 "configure"
 #include "confdefs.h"
 #include <GL/gl.h>
 int main() {
 GLenum test = GL_COLOR_INDEX8_EXT;
 ; return 0; }
 EOF
-if { (eval echo configure:3485: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:3516: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   cat >> confdefs.h <<\EOF
 #define HAVE_GL_COLOR_TABLE 1
@@ -3499,7 +3530,7 @@ echo "$ac_t""$dummy" 1>&6
     	    if test "$ac_cv_lib_GL_glXCreateContext" = "no"
 	    then
 		echo $ac_n "checking for glColorTableEXT in -lMesaGL""... $ac_c" 1>&6
-echo "configure:3503: checking for glColorTableEXT in -lMesaGL" >&5
+echo "configure:3534: checking for glColorTableEXT in -lMesaGL" >&5
 ac_lib_var=`echo MesaGL'_'glColorTableEXT | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3507,7 +3538,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lMesaGL $X_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3511 "configure"
+#line 3542 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3518,7 +3549,7 @@ int main() {
 glColorTableEXT()
 ; return 0; }
 EOF
-if { (eval echo configure:3522: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3553: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3543,7 +3574,7 @@ fi
 
 	    else
 		echo $ac_n "checking for glColorTableEXT in -lGL""... $ac_c" 1>&6
-echo "configure:3547: checking for glColorTableEXT in -lGL" >&5
+echo "configure:3578: checking for glColorTableEXT in -lGL" >&5
 ac_lib_var=`echo GL'_'glColorTableEXT | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3551,7 +3582,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lGL $X_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3555 "configure"
+#line 3586 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3562,7 +3593,7 @@ int main() {
 glColorTableEXT()
 ; return 0; }
 EOF
-if { (eval echo configure:3566: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3597: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3600,17 +3631,17 @@ for ac_hdr in ncurses.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:3604: checking for $ac_hdr" >&5
+echo "configure:3635: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3609 "configure"
+#line 3640 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:3614: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:3645: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -3639,7 +3670,7 @@ done
 if test "$ac_cv_header_ncurses_h" = "yes"
 then 
     echo $ac_n "checking for waddch in -lncurses""... $ac_c" 1>&6
-echo "configure:3643: checking for waddch in -lncurses" >&5
+echo "configure:3674: checking for waddch in -lncurses" >&5
 ac_lib_var=`echo ncurses'_'waddch | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3647,7 +3678,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lncurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3651 "configure"
+#line 3682 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3658,7 +3689,7 @@ int main() {
 waddch()
 ; return 0; }
 EOF
-if { (eval echo configure:3662: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3693: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3689,7 +3720,7 @@ fi
 if test "$ac_cv_lib_ncurses_waddch" = "yes"
 then
     echo $ac_n "checking for resizeterm in -lncurses""... $ac_c" 1>&6
-echo "configure:3693: checking for resizeterm in -lncurses" >&5
+echo "configure:3724: checking for resizeterm in -lncurses" >&5
 ac_lib_var=`echo ncurses'_'resizeterm | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3697,7 +3728,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lncurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3701 "configure"
+#line 3732 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3708,7 +3739,7 @@ int main() {
 resizeterm()
 ; return 0; }
 EOF
-if { (eval echo configure:3712: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3743: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3732,7 +3763,7 @@ else
 fi
 
     echo $ac_n "checking for getbkgd in -lncurses""... $ac_c" 1>&6
-echo "configure:3736: checking for getbkgd in -lncurses" >&5
+echo "configure:3767: checking for getbkgd in -lncurses" >&5
 ac_lib_var=`echo ncurses'_'getbkgd | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3740,7 +3771,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lncurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3744 "configure"
+#line 3775 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3751,7 +3782,7 @@ int main() {
 getbkgd()
 ; return 0; }
 EOF
-if { (eval echo configure:3755: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3786: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3779,17 +3810,17 @@ else
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:3783: checking for $ac_hdr" >&5
+echo "configure:3814: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3788 "configure"
+#line 3819 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:3793: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:3824: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -3818,7 +3849,7 @@ done
     if test "$ac_cv_header_curses_h" = "yes"
     then    
        echo $ac_n "checking for waddch in -lcurses""... $ac_c" 1>&6
-echo "configure:3822: checking for waddch in -lcurses" >&5
+echo "configure:3853: checking for waddch in -lcurses" >&5
 ac_lib_var=`echo curses'_'waddch | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3826,7 +3857,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lcurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3830 "configure"
+#line 3861 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3837,7 +3868,7 @@ int main() {
 waddch()
 ; return 0; }
 EOF
-if { (eval echo configure:3841: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3872: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3865,7 +3896,7 @@ else
 fi
 
        echo $ac_n "checking for resizeterm in -lcurses""... $ac_c" 1>&6
-echo "configure:3869: checking for resizeterm in -lcurses" >&5
+echo "configure:3900: checking for resizeterm in -lcurses" >&5
 ac_lib_var=`echo curses'_'resizeterm | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3873,7 +3904,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lcurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3877 "configure"
+#line 3908 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3884,7 +3915,7 @@ int main() {
 resizeterm()
 ; return 0; }
 EOF
-if { (eval echo configure:3888: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3919: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3908,7 +3939,7 @@ else
 fi
 
        echo $ac_n "checking for getbkgd in -lcurses""... $ac_c" 1>&6
-echo "configure:3912: checking for getbkgd in -lcurses" >&5
+echo "configure:3943: checking for getbkgd in -lcurses" >&5
 ac_lib_var=`echo curses'_'getbkgd | sed 'y%./+-%__p_%'`
 if eval "test \"`echo '$''{'ac_cv_lib_$ac_lib_var'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
@@ -3916,7 +3947,7 @@ else
   ac_save_LIBS="$LIBS"
 LIBS="-lcurses  $LIBS"
 cat > conftest.$ac_ext <<EOF
-#line 3920 "configure"
+#line 3951 "configure"
 #include "confdefs.h"
 /* Override any gcc2 internal prototype to avoid an error.  */
 /* We use char because int might match the return type of a gcc2
@@ -3927,7 +3958,7 @@ int main() {
 getbkgd()
 ; return 0; }
 EOF
-if { (eval echo configure:3931: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:3962: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_lib_$ac_lib_var=yes"
 else
@@ -3954,12 +3985,12 @@ fi
 fi
 
 echo $ac_n "checking "for GNU style IPX support"""... $ac_c" 1>&6
-echo "configure:3958: checking "for GNU style IPX support"" >&5
+echo "configure:3989: checking "for GNU style IPX support"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_ipx_gnu'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 3963 "configure"
+#line 3994 "configure"
 #include "confdefs.h"
 #include <sys/socket.h>
     #include <netipx/ipx.h>
@@ -3967,7 +3998,7 @@ int main() {
 ((struct sockaddr_ipx *)0)->sipx_family == AF_IPX
 ; return 0; }
 EOF
-if { (eval echo configure:3971: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4002: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_ipx_gnu="yes"
 else
@@ -3992,12 +4023,12 @@ fi
 if test "$ac_cv_c_ipx_gnu" = "no"
 then
  echo $ac_n "checking "for linux style IPX support"""... $ac_c" 1>&6
-echo "configure:3996: checking "for linux style IPX support"" >&5
+echo "configure:4027: checking "for linux style IPX support"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_ipx_linux'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4001 "configure"
+#line 4032 "configure"
 #include "confdefs.h"
 #include <sys/socket.h>
      #include <asm/types.h>
@@ -4006,7 +4037,7 @@ int main() {
 ((struct sockaddr_ipx *)0)->sipx_family == AF_IPX
 ; return 0; }
 EOF
-if { (eval echo configure:4010: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4041: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_ipx_linux="yes"
 else
@@ -4033,17 +4064,17 @@ for ac_hdr in sys/soundcard.h machine/soundcard.h soundcard.h
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:4037: checking for $ac_hdr" >&5
+echo "configure:4068: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4042 "configure"
+#line 4073 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:4047: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:4078: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -4071,12 +4102,12 @@ done
 
 
 echo $ac_n "checking "for Open Sound System"""... $ac_c" 1>&6
-echo "configure:4075: checking "for Open Sound System"" >&5
+echo "configure:4106: checking "for Open Sound System"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_opensoundsystem'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4080 "configure"
+#line 4111 "configure"
 #include "confdefs.h"
 
 	#if defined(HAVE_SYS_SOUNDCARD_H)
@@ -4097,7 +4128,7 @@ int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:4101: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4132: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_opensoundsystem="yes"
 else
@@ -4120,12 +4151,12 @@ EOF
 fi
 
 echo $ac_n "checking "for Open Sound System/MIDI interface"""... $ac_c" 1>&6
-echo "configure:4124: checking "for Open Sound System/MIDI interface"" >&5
+echo "configure:4155: checking "for Open Sound System/MIDI interface"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_opensoundsystem_midi'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4129 "configure"
+#line 4160 "configure"
 #include "confdefs.h"
 
 	#if defined(HAVE_SYS_SOUNDCARD_H)
@@ -4146,7 +4177,7 @@ int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:4150: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4181: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_opensoundsystem_midi="yes"
 else
@@ -4175,7 +4206,7 @@ if test "x${GCC}" = "xyes"
 then
   CFLAGS="$CFLAGS -Wall"
   echo $ac_n "checking "for gcc strength-reduce bug"""... $ac_c" 1>&6
-echo "configure:4179: checking "for gcc strength-reduce bug"" >&5
+echo "configure:4210: checking "for gcc strength-reduce bug"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_gcc_strength_bug'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4183,7 +4214,7 @@ else
   ac_cv_c_gcc_strength_bug="yes"
 else
   cat > conftest.$ac_ext <<EOF
-#line 4187 "configure"
+#line 4218 "configure"
 #include "confdefs.h"
 
 int main(void) {
@@ -4194,7 +4225,7 @@ int main(void) {
   exit( Array[1] != -2 );
 }
 EOF
-if { (eval echo configure:4198: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4229: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_gcc_strength_bug="no"
 else
@@ -4217,7 +4248,7 @@ fi
 
 
 echo $ac_n "checking "whether external symbols need an underscore prefix"""... $ac_c" 1>&6
-echo "configure:4221: checking "whether external symbols need an underscore prefix"" >&5
+echo "configure:4252: checking "whether external symbols need an underscore prefix"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_extern_prefix'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4229,14 +4260,14 @@ _ac_test:
 	.long 0
 EOF
 cat > conftest.$ac_ext <<EOF
-#line 4233 "configure"
+#line 4264 "configure"
 #include "confdefs.h"
 extern int ac_test;
 int main() {
 if (ac_test) return 1
 ; return 0; }
 EOF
-if { (eval echo configure:4240: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4271: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_c_extern_prefix="yes"
 else
@@ -4260,7 +4291,7 @@ fi
 
 
 echo $ac_n "checking "whether assembler accepts .string"""... $ac_c" 1>&6
-echo "configure:4264: checking "whether assembler accepts .string"" >&5
+echo "configure:4295: checking "whether assembler accepts .string"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_asm_string'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4270,14 +4301,14 @@ cat > conftest_asm.s <<EOF
 	.string "test"
 EOF
 cat > conftest.$ac_ext <<EOF
-#line 4274 "configure"
+#line 4305 "configure"
 #include "confdefs.h"
 
 int main() {
 
 ; return 0; }
 EOF
-if { (eval echo configure:4281: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4312: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_c_asm_string="yes"
 else
@@ -4304,21 +4335,21 @@ LDSHARED=""
 if test "$LIBEXT" = "so"
 then
   echo $ac_n "checking "whether we can build a Linux dll"""... $ac_c" 1>&6
-echo "configure:4308: checking "whether we can build a Linux dll"" >&5
+echo "configure:4339: checking "whether we can build a Linux dll"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_dll_linux'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   saved_cflags=$CFLAGS
   CFLAGS="$CFLAGS -fPIC -shared -Wl,-soname,conftest.so.1.0"
   cat > conftest.$ac_ext <<EOF
-#line 4315 "configure"
+#line 4346 "configure"
 #include "confdefs.h"
 
 int main() {
 return 1
 ; return 0; }
 EOF
-if { (eval echo configure:4322: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4353: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_c_dll_linux="yes"
 else
@@ -4338,21 +4369,21 @@ echo "$ac_t""$ac_cv_c_dll_linux" 1>&6
     LDSHARED="\$(CC) -shared -Wl,-soname,\$(SONAME),-rpath,\$(libdir)"
   else
     echo $ac_n "checking whether we can build a UnixWare (Solaris) dll""... $ac_c" 1>&6
-echo "configure:4342: checking whether we can build a UnixWare (Solaris) dll" >&5
+echo "configure:4373: checking whether we can build a UnixWare (Solaris) dll" >&5
 if eval "test \"`echo '$''{'ac_cv_c_dll_unixware'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   saved_cflags=$CFLAGS
     CFLAGS="$CFLAGS -fPIC -Wl,-G,-h,conftest.so.1.0"
     cat > conftest.$ac_ext <<EOF
-#line 4349 "configure"
+#line 4380 "configure"
 #include "confdefs.h"
 
 int main() {
 return 1
 ; return 0; }
 EOF
-if { (eval echo configure:4356: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4387: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_c_dll_unixware="yes"
 else
@@ -4372,21 +4403,21 @@ echo "$ac_t""$ac_cv_c_dll_unixware" 1>&6
       LDSHARED="\$(CC) -Wl,-G,-h,\$(libdir)/\$(SONAME)"
     else
       echo $ac_n "checking "whether we can build a NetBSD dll"""... $ac_c" 1>&6
-echo "configure:4376: checking "whether we can build a NetBSD dll"" >&5
+echo "configure:4407: checking "whether we can build a NetBSD dll"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_dll_netbsd'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   saved_cflags=$CFLAGS
       CFLAGS="$CFLAGS -fPIC -Bshareable -Bforcearchive"
       cat > conftest.$ac_ext <<EOF
-#line 4383 "configure"
+#line 4414 "configure"
 #include "confdefs.h"
 
 int main() {
 return 1
 ; return 0; }
 EOF
-if { (eval echo configure:4390: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4421: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_c_dll_netbsd="yes"
 else
@@ -4422,21 +4453,21 @@ if test "$LIBEXT" = "so"; then
     DLLFLAGS="-fPIC"
 else
     echo $ac_n "checking whether the linker supports --[no]-whole-archive (Linux)""... $ac_c" 1>&6
-echo "configure:4426: checking whether the linker supports --[no]-whole-archive (Linux)" >&5
+echo "configure:4457: checking whether the linker supports --[no]-whole-archive (Linux)" >&5
 if eval "test \"`echo '$''{'ac_cv_c_whole_archive'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   saved_cflags=$CFLAGS
             CFLAGS="$CFLAGS -Wl,--whole-archive -Wl,--no-whole-archive"
             cat > conftest.$ac_ext <<EOF
-#line 4433 "configure"
+#line 4464 "configure"
 #include "confdefs.h"
 
 int main() {
 return 1
 ; return 0; }
 EOF
-if { (eval echo configure:4440: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4471: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_c_whole_archive="yes"
 else
@@ -4456,21 +4487,21 @@ echo "$ac_t""$ac_cv_c_whole_archive" 1>&6
         DLL_LINK="-Wl,--whole-archive $DLL_LINK -Wl,--no-whole-archive"
     else
         echo $ac_n "checking whether the linker supports -z {all,default}extract (Linux)""... $ac_c" 1>&6
-echo "configure:4460: checking whether the linker supports -z {all,default}extract (Linux)" >&5
+echo "configure:4491: checking whether the linker supports -z {all,default}extract (Linux)" >&5
 if eval "test \"`echo '$''{'ac_cv_c_allextract'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   saved_cflags=$CFLAGS
 		CFLAGS="$CFLAGS -Wl,-z,allextract -Wl,-z,defaultextract"
 		cat > conftest.$ac_ext <<EOF
-#line 4467 "configure"
+#line 4498 "configure"
 #include "confdefs.h"
 
 int main() {
 return 1
 ; return 0; }
 EOF
-if { (eval echo configure:4474: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4505: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_c_allextract="yes"
 else
@@ -4501,7 +4532,7 @@ fi
 
 wine_cv_libc_reentrant=no 
 echo $ac_n "checking "for reentrant libc: __errno_location"""... $ac_c" 1>&6
-echo "configure:4505: checking "for reentrant libc: __errno_location"" >&5
+echo "configure:4536: checking "for reentrant libc: __errno_location"" >&5
 if eval "test \"`echo '$''{'wine_cv_libc_r__errno_location'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4509,14 +4540,14 @@ else
   wine_cv_libc_r__errno_location=yes 
 else
   cat > conftest.$ac_ext <<EOF
-#line 4513 "configure"
+#line 4544 "configure"
 #include "confdefs.h"
 int myerrno = 0;
 char buf[256];
 int *__errno_location(){return &myerrno;}
 main(){connect(0,buf,255); exit(!myerrno);}
 EOF
-if { (eval echo configure:4520: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4551: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   wine_cv_libc_r__errno_location=yes
 else
@@ -4541,7 +4572,7 @@ EOF
     wine_cv_libc_reentrant=__errno_location 
 fi
 echo $ac_n "checking "for reentrant libc: __error"""... $ac_c" 1>&6
-echo "configure:4545: checking "for reentrant libc: __error"" >&5
+echo "configure:4576: checking "for reentrant libc: __error"" >&5
 if eval "test \"`echo '$''{'wine_cv_libc_r__error'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4549,14 +4580,14 @@ else
   wine_cv_libc_r__error=yes 
 else
   cat > conftest.$ac_ext <<EOF
-#line 4553 "configure"
+#line 4584 "configure"
 #include "confdefs.h"
 int myerrno = 0;
 char buf[256];
 int *__error(){return &myerrno;}
 main(){connect(0,buf,255); exit(!myerrno);}
 EOF
-if { (eval echo configure:4560: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4591: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   wine_cv_libc_r__error=yes
 else
@@ -4581,7 +4612,7 @@ EOF
     wine_cv_libc_reentrant=__error 
 fi
 echo $ac_n "checking "for reentrant libc: ___errno"""... $ac_c" 1>&6
-echo "configure:4585: checking "for reentrant libc: ___errno"" >&5
+echo "configure:4616: checking "for reentrant libc: ___errno"" >&5
 if eval "test \"`echo '$''{'wine_cv_libc_r___errno'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4589,14 +4620,14 @@ else
   wine_cv_libc_r___errno=yes 
 else
   cat > conftest.$ac_ext <<EOF
-#line 4593 "configure"
+#line 4624 "configure"
 #include "confdefs.h"
 int myerrno = 0;
 char buf[256];
 int *___errno(){return &myerrno;}
 main(){connect(0,buf,255); exit(!myerrno);}
 EOF
-if { (eval echo configure:4600: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4631: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   wine_cv_libc_r___errno=yes
 else
@@ -4621,7 +4652,7 @@ EOF
     wine_cv_libc_reentrant=___errno 
 fi
 echo $ac_n "checking "for reentrant libc: __thr_errno"""... $ac_c" 1>&6
-echo "configure:4625: checking "for reentrant libc: __thr_errno"" >&5
+echo "configure:4656: checking "for reentrant libc: __thr_errno"" >&5
 if eval "test \"`echo '$''{'wine_cv_libc_r__thr_errno'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4629,14 +4660,14 @@ else
   wine_cv_libc_r__thr_errno=yes 
 else
   cat > conftest.$ac_ext <<EOF
-#line 4633 "configure"
+#line 4664 "configure"
 #include "confdefs.h"
 int myerrno = 0;
 char buf[256];
 int *__thr_errno(){return &myerrno;}
 main(){connect(0,buf,255); exit(!myerrno);}
 EOF
-if { (eval echo configure:4640: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4671: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   wine_cv_libc_r__thr_errno=yes
 else
@@ -4672,7 +4703,7 @@ fi
 if test "$have_x" = "yes" -a "$wine_cv_libc_reentrant" != "no"
 then
 echo $ac_n "checking "for reentrant X libraries"""... $ac_c" 1>&6
-echo "configure:4676: checking "for reentrant X libraries"" >&5
+echo "configure:4707: checking "for reentrant X libraries"" >&5
 if eval "test \"`echo '$''{'wine_cv_x_reentrant'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -4718,14 +4749,14 @@ fi
 
 
 echo $ac_n "checking whether byte ordering is bigendian""... $ac_c" 1>&6
-echo "configure:4722: checking whether byte ordering is bigendian" >&5
+echo "configure:4753: checking whether byte ordering is bigendian" >&5
 if eval "test \"`echo '$''{'ac_cv_c_bigendian'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_cv_c_bigendian=unknown
 # See if sys/param.h defines the BYTE_ORDER macro.
 cat > conftest.$ac_ext <<EOF
-#line 4729 "configure"
+#line 4760 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -4736,11 +4767,11 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:4740: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4771: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   # It does; now see whether it defined to BIG_ENDIAN or not.
 cat > conftest.$ac_ext <<EOF
-#line 4744 "configure"
+#line 4775 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/param.h>
@@ -4751,7 +4782,7 @@ int main() {
 #endif
 ; return 0; }
 EOF
-if { (eval echo configure:4755: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:4786: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_bigendian=yes
 else
@@ -4771,7 +4802,7 @@ if test "$cross_compiling" = yes; then
     { echo "configure: error: can not run test program while cross compiling" 1>&2; exit 1; }
 else
   cat > conftest.$ac_ext <<EOF
-#line 4775 "configure"
+#line 4806 "configure"
 #include "confdefs.h"
 main () {
   /* Are we little or big endian?  From Harbison&Steele.  */
@@ -4784,7 +4815,7 @@ main () {
   exit (u.c[sizeof (long) - 1] == 1);
 }
 EOF
-if { (eval echo configure:4788: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:4819: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_bigendian=no
 else
@@ -4812,19 +4843,19 @@ fi
 # The Ultrix 4.2 mips builtin alloca declared by alloca.h only works
 # for constant arguments.  Useless!
 echo $ac_n "checking for working alloca.h""... $ac_c" 1>&6
-echo "configure:4816: checking for working alloca.h" >&5
+echo "configure:4847: checking for working alloca.h" >&5
 if eval "test \"`echo '$''{'ac_cv_header_alloca_h'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4821 "configure"
+#line 4852 "configure"
 #include "confdefs.h"
 #include <alloca.h>
 int main() {
 void *p = alloca(2 * sizeof(int));
 ; return 0; }
 EOF
-if { (eval echo configure:4828: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4859: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_header_alloca_h=yes
 else
@@ -4845,12 +4876,12 @@ EOF
 fi
 
 echo $ac_n "checking for alloca""... $ac_c" 1>&6
-echo "configure:4849: checking for alloca" >&5
+echo "configure:4880: checking for alloca" >&5
 if eval "test \"`echo '$''{'ac_cv_func_alloca_works'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4854 "configure"
+#line 4885 "configure"
 #include "confdefs.h"
 
 #ifdef __GNUC__
@@ -4878,7 +4909,7 @@ int main() {
 char *p = (char *) alloca(1);
 ; return 0; }
 EOF
-if { (eval echo configure:4882: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:4913: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   ac_cv_func_alloca_works=yes
 else
@@ -4910,12 +4941,12 @@ EOF
 
 
 echo $ac_n "checking whether alloca needs Cray hooks""... $ac_c" 1>&6
-echo "configure:4914: checking whether alloca needs Cray hooks" >&5
+echo "configure:4945: checking whether alloca needs Cray hooks" >&5
 if eval "test \"`echo '$''{'ac_cv_os_cray'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4919 "configure"
+#line 4950 "configure"
 #include "confdefs.h"
 #if defined(CRAY) && ! defined(CRAY2)
 webecray
@@ -4940,12 +4971,12 @@ echo "$ac_t""$ac_cv_os_cray" 1>&6
 if test $ac_cv_os_cray = yes; then
 for ac_func in _getb67 GETB67 getb67; do
   echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:4944: checking for $ac_func" >&5
+echo "configure:4975: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 4949 "configure"
+#line 4980 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -4968,7 +4999,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:4972: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5003: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -4995,7 +5026,7 @@ done
 fi
 
 echo $ac_n "checking stack direction for C alloca""... $ac_c" 1>&6
-echo "configure:4999: checking stack direction for C alloca" >&5
+echo "configure:5030: checking stack direction for C alloca" >&5
 if eval "test \"`echo '$''{'ac_cv_c_stack_direction'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5003,7 +5034,7 @@ else
   ac_cv_c_stack_direction=0
 else
   cat > conftest.$ac_ext <<EOF
-#line 5007 "configure"
+#line 5038 "configure"
 #include "confdefs.h"
 find_stack_direction ()
 {
@@ -5022,7 +5053,7 @@ main ()
   exit (find_stack_direction() < 0);
 }
 EOF
-if { (eval echo configure:5026: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5057: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_stack_direction=1
 else
@@ -5073,12 +5104,12 @@ for ac_func in \
 
 do
 echo $ac_n "checking for $ac_func""... $ac_c" 1>&6
-echo "configure:5077: checking for $ac_func" >&5
+echo "configure:5108: checking for $ac_func" >&5
 if eval "test \"`echo '$''{'ac_cv_func_$ac_func'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5082 "configure"
+#line 5113 "configure"
 #include "confdefs.h"
 /* System header to define __stub macros and hopefully few prototypes,
     which can conflict with char $ac_func(); below.  */
@@ -5101,7 +5132,7 @@ $ac_func();
 
 ; return 0; }
 EOF
-if { (eval echo configure:5105: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
+if { (eval echo configure:5136: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then
   rm -rf conftest*
   eval "ac_cv_func_$ac_func=yes"
 else
@@ -5180,17 +5211,17 @@ for ac_hdr in \
 do
 ac_safe=`echo "$ac_hdr" | sed 'y%./+-%__p_%'`
 echo $ac_n "checking for $ac_hdr""... $ac_c" 1>&6
-echo "configure:5184: checking for $ac_hdr" >&5
+echo "configure:5215: checking for $ac_hdr" >&5
 if eval "test \"`echo '$''{'ac_cv_header_$ac_safe'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5189 "configure"
+#line 5220 "configure"
 #include "confdefs.h"
 #include <$ac_hdr>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5194: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5225: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5217,12 +5248,12 @@ fi
 done
 
 echo $ac_n "checking whether stat file-mode macros are broken""... $ac_c" 1>&6
-echo "configure:5221: checking whether stat file-mode macros are broken" >&5
+echo "configure:5252: checking whether stat file-mode macros are broken" >&5
 if eval "test \"`echo '$''{'ac_cv_header_stat_broken'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5226 "configure"
+#line 5257 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -5275,12 +5306,12 @@ fi
 
 
 echo $ac_n "checking for working const""... $ac_c" 1>&6
-echo "configure:5279: checking for working const" >&5
+echo "configure:5310: checking for working const" >&5
 if eval "test \"`echo '$''{'ac_cv_c_const'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5284 "configure"
+#line 5315 "configure"
 #include "confdefs.h"
 
 int main() {
@@ -5329,7 +5360,7 @@ ccp = (char const *const *) p;
 
 ; return 0; }
 EOF
-if { (eval echo configure:5333: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5364: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_const=yes
 else
@@ -5350,21 +5381,21 @@ EOF
 fi
 
 echo $ac_n "checking for inline""... $ac_c" 1>&6
-echo "configure:5354: checking for inline" >&5
+echo "configure:5385: checking for inline" >&5
 if eval "test \"`echo '$''{'ac_cv_c_inline'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   ac_cv_c_inline=no
 for ac_kw in inline __inline__ __inline; do
   cat > conftest.$ac_ext <<EOF
-#line 5361 "configure"
+#line 5392 "configure"
 #include "confdefs.h"
 
 int main() {
 } int $ac_kw foo() {
 ; return 0; }
 EOF
-if { (eval echo configure:5368: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5399: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_inline=$ac_kw; break
 else
@@ -5390,12 +5421,12 @@ EOF
 esac
 
 echo $ac_n "checking for ANSI C header files""... $ac_c" 1>&6
-echo "configure:5394: checking for ANSI C header files" >&5
+echo "configure:5425: checking for ANSI C header files" >&5
 if eval "test \"`echo '$''{'ac_cv_header_stdc'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5399 "configure"
+#line 5430 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 #include <stdarg.h>
@@ -5403,7 +5434,7 @@ else
 #include <float.h>
 EOF
 ac_try="$ac_cpp conftest.$ac_ext >/dev/null 2>conftest.out"
-{ (eval echo configure:5407: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
+{ (eval echo configure:5438: \"$ac_try\") 1>&5; (eval $ac_try) 2>&5; }
 ac_err=`grep -v '^ *+' conftest.out | grep -v "^conftest.${ac_ext}\$"`
 if test -z "$ac_err"; then
   rm -rf conftest*
@@ -5420,7 +5451,7 @@ rm -f conftest*
 if test $ac_cv_header_stdc = yes; then
   # SunOS 4.x string.h does not declare mem*, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 5424 "configure"
+#line 5455 "configure"
 #include "confdefs.h"
 #include <string.h>
 EOF
@@ -5438,7 +5469,7 @@ fi
 if test $ac_cv_header_stdc = yes; then
   # ISC 2.0.2 stdlib.h does not declare free, contrary to ANSI.
 cat > conftest.$ac_ext <<EOF
-#line 5442 "configure"
+#line 5473 "configure"
 #include "confdefs.h"
 #include <stdlib.h>
 EOF
@@ -5459,7 +5490,7 @@ if test "$cross_compiling" = yes; then
   :
 else
   cat > conftest.$ac_ext <<EOF
-#line 5463 "configure"
+#line 5494 "configure"
 #include "confdefs.h"
 #include <ctype.h>
 #define ISLOWER(c) ('a' <= (c) && (c) <= 'z')
@@ -5470,7 +5501,7 @@ if (XOR (islower (i), ISLOWER (i)) || toupper (i) != TOUPPER (i)) exit(2);
 exit (0); }
 
 EOF
-if { (eval echo configure:5474: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5505: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   :
 else
@@ -5494,12 +5525,12 @@ EOF
 fi
 
 echo $ac_n "checking for size_t""... $ac_c" 1>&6
-echo "configure:5498: checking for size_t" >&5
+echo "configure:5529: checking for size_t" >&5
 if eval "test \"`echo '$''{'ac_cv_type_size_t'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5503 "configure"
+#line 5534 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #if STDC_HEADERS
@@ -5527,7 +5558,7 @@ EOF
 fi
 
 echo $ac_n "checking size of long long""... $ac_c" 1>&6
-echo "configure:5531: checking size of long long" >&5
+echo "configure:5562: checking size of long long" >&5
 if eval "test \"`echo '$''{'ac_cv_sizeof_long_long'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5535,7 +5566,7 @@ else
   ac_cv_sizeof_long_long=0
 else
   cat > conftest.$ac_ext <<EOF
-#line 5539 "configure"
+#line 5570 "configure"
 #include "confdefs.h"
 #include <stdio.h>
 main()
@@ -5546,7 +5577,7 @@ main()
   exit(0);
 }
 EOF
-if { (eval echo configure:5550: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5581: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_sizeof_long_long=`cat conftestval`
 else
@@ -5569,12 +5600,12 @@ EOF
 if test "$ac_cv_header_linux_joystick_h" = "yes"
 then
    echo $ac_n "checking "whether linux/joystick.h uses the Linux 2.2+ API"""... $ac_c" 1>&6
-echo "configure:5573: checking "whether linux/joystick.h uses the Linux 2.2+ API"" >&5
+echo "configure:5604: checking "whether linux/joystick.h uses the Linux 2.2+ API"" >&5
 if eval "test \"`echo '$''{'wine_cv_linux_joystick_22_api'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5578 "configure"
+#line 5609 "configure"
 #include "confdefs.h"
 
 	#include <sys/ioctl.h>
@@ -5589,7 +5620,7 @@ int main() {
 /*empty*/
 ; return 0; }
 EOF
-if { (eval echo configure:5593: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5624: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   wine_cv_linux_joystick_22_api=yes
 else
@@ -5616,12 +5647,12 @@ fi
 if test "$ac_cv_header_sys_vfs_h" = "yes"
 then
     echo $ac_n "checking "whether sys/vfs.h defines statfs"""... $ac_c" 1>&6
-echo "configure:5620: checking "whether sys/vfs.h defines statfs"" >&5
+echo "configure:5651: checking "whether sys/vfs.h defines statfs"" >&5
 if eval "test \"`echo '$''{'wine_cv_sys_vfs_has_statfs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5625 "configure"
+#line 5656 "configure"
 #include "confdefs.h"
 
 	#include <sys/types.h>
@@ -5638,7 +5669,7 @@ int main() {
 	
 ; return 0; }
 EOF
-if { (eval echo configure:5642: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5673: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   wine_cv_sys_vfs_has_statfs=yes
 else
@@ -5665,12 +5696,12 @@ fi
 if test "$ac_cv_header_sys_statfs_h" = "yes"
 then
     echo $ac_n "checking "whether sys/statfs.h defines statfs"""... $ac_c" 1>&6
-echo "configure:5669: checking "whether sys/statfs.h defines statfs"" >&5
+echo "configure:5700: checking "whether sys/statfs.h defines statfs"" >&5
 if eval "test \"`echo '$''{'wine_cv_sys_statfs_has_statfs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5674 "configure"
+#line 5705 "configure"
 #include "confdefs.h"
 
 	#include <sys/types.h>
@@ -5685,7 +5716,7 @@ int main() {
 	
 ; return 0; }
 EOF
-if { (eval echo configure:5689: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5720: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   wine_cv_sys_statfs_has_statfs=yes
 else
@@ -5712,12 +5743,12 @@ fi
 if test "$ac_cv_header_sys_mount_h" = "yes"
 then
     echo $ac_n "checking "whether sys/mount.h defines statfs"""... $ac_c" 1>&6
-echo "configure:5716: checking "whether sys/mount.h defines statfs"" >&5
+echo "configure:5747: checking "whether sys/mount.h defines statfs"" >&5
 if eval "test \"`echo '$''{'wine_cv_sys_mount_has_statfs'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5721 "configure"
+#line 5752 "configure"
 #include "confdefs.h"
 
 	#include <sys/types.h>
@@ -5732,7 +5763,7 @@ int main() {
 	
 ; return 0; }
 EOF
-if { (eval echo configure:5736: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5767: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   wine_cv_sys_mount_has_statfs=yes
 else
@@ -5758,7 +5789,7 @@ fi
 
 
 echo $ac_n "checking "for statfs.f_bfree"""... $ac_c" 1>&6
-echo "configure:5762: checking "for statfs.f_bfree"" >&5
+echo "configure:5793: checking "for statfs.f_bfree"" >&5
 if eval "test \"`echo '$''{'wine_cv_statfs_bfree'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5767,7 +5798,7 @@ else
         wine_cv_statfs_bfree=no
     else
     	cat > conftest.$ac_ext <<EOF
-#line 5771 "configure"
+#line 5802 "configure"
 #include "confdefs.h"
 
 	#include <sys/types.h>
@@ -5794,7 +5825,7 @@ int main() {
 	
 ; return 0; }
 EOF
-if { (eval echo configure:5798: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5829: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   wine_cv_statfs_bfree=yes
 else
@@ -5818,7 +5849,7 @@ EOF
 fi
 
 echo $ac_n "checking "for statfs.f_bavail"""... $ac_c" 1>&6
-echo "configure:5822: checking "for statfs.f_bavail"" >&5
+echo "configure:5853: checking "for statfs.f_bavail"" >&5
 if eval "test \"`echo '$''{'wine_cv_statfs_bavail'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5827,7 +5858,7 @@ else
         wine_cv_statfs_bavail=no
     else
     	cat > conftest.$ac_ext <<EOF
-#line 5831 "configure"
+#line 5862 "configure"
 #include "confdefs.h"
 
 	#include <sys/types.h>
@@ -5854,7 +5885,7 @@ int main() {
 	
 ; return 0; }
 EOF
-if { (eval echo configure:5858: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:5889: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   wine_cv_statfs_bavail=yes
 else
@@ -5879,7 +5910,7 @@ fi
 
 
 echo $ac_n "checking "for working sigaltstack"""... $ac_c" 1>&6
-echo "configure:5883: checking "for working sigaltstack"" >&5
+echo "configure:5914: checking "for working sigaltstack"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_working_sigaltstack'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
@@ -5888,7 +5919,7 @@ else
 
 else
   cat > conftest.$ac_ext <<EOF
-#line 5892 "configure"
+#line 5923 "configure"
 #include "confdefs.h"
 
 	#include <stdio.h>
@@ -5926,7 +5957,7 @@ else
 	}
 	
 EOF
-if { (eval echo configure:5930: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
+if { (eval echo configure:5961: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext} && (./conftest; exit) 2>/dev/null
 then
   ac_cv_c_working_sigaltstack="yes"
 else
@@ -5953,12 +5984,12 @@ fi
 
 
 echo $ac_n "checking "for msg_accrights in struct msghdr"""... $ac_c" 1>&6
-echo "configure:5957: checking "for msg_accrights in struct msghdr"" >&5
+echo "configure:5988: checking "for msg_accrights in struct msghdr"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_msg_accrights'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5962 "configure"
+#line 5993 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -5966,7 +5997,7 @@ int main() {
 struct msghdr hdr; hdr.msg_accrights=0
 ; return 0; }
 EOF
-if { (eval echo configure:5970: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:6001: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_msg_accrights="yes"
 else
@@ -5989,12 +6020,12 @@ fi
 
 
 echo $ac_n "checking "for sun_len in struct sockaddr_un"""... $ac_c" 1>&6
-echo "configure:5993: checking "for sun_len in struct sockaddr_un"" >&5
+echo "configure:6024: checking "for sun_len in struct sockaddr_un"" >&5
 if eval "test \"`echo '$''{'ac_cv_c_sun_len'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 5998 "configure"
+#line 6029 "configure"
 #include "confdefs.h"
 #include <sys/types.h>
 #include <sys/socket.h>
@@ -6003,7 +6034,7 @@ int main() {
 static struct sockaddr_un addr; addr.sun_len = 1
 ; return 0; }
 EOF
-if { (eval echo configure:6007: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
+if { (eval echo configure:6038: \"$ac_compile\") 1>&5; (eval $ac_compile) 2>&5; }; then
   rm -rf conftest*
   ac_cv_c_sun_len="yes"
 else
@@ -6026,12 +6057,12 @@ fi
 
 
 echo $ac_n "checking "whether we need to define __i386__"""... $ac_c" 1>&6
-echo "configure:6030: checking "whether we need to define __i386__"" >&5
+echo "configure:6061: checking "whether we need to define __i386__"" >&5
 if eval "test \"`echo '$''{'ac_cv_cpp_def_i386'+set}'`\" = set"; then
   echo $ac_n "(cached) $ac_c" 1>&6
 else
   cat > conftest.$ac_ext <<EOF
-#line 6035 "configure"
+#line 6066 "configure"
 #include "confdefs.h"
 #if (defined(i386) || defined(__i386)) && !defined(__i386__)
 yes
@@ -6724,7 +6755,15 @@ if test "$wine_cv_mesa_version_OK" = "no"
 then
   echo
   echo "*** Warning: old Mesa headers detected. Wine will be built without Direct3D"
-  echo "*** support. Consider upgrading your Mesa libraries (http://www.mesa3d.org/)"
+  echo "*** support. Consider upgrading your Mesa libraries (http://www.mesa3d.org/)."
+fi
+
+if test "$wine_cv_mesa_version_threadsafe" = "yes"
+then
+  echo
+  echo "*** Warning: the OpenGL version you have installed relies on libpthread for"
+  echo "*** thread-safety. To prevent crashes, OpenGL support has been removed"
+  echo "*** (while we work on a better fix)."
 fi
 
 echo
diff --git a/configure.in b/configure.in
index fcb43d27896..1071257b91f 100644
--- a/configure.in
+++ b/configure.in
@@ -177,7 +177,18 @@ then
 	  )
         )
 
-        if test "$wine_cv_mesa_version_OK" = "yes"
+	dnl Check for the thread-safety of the OpenGL library
+        AC_CACHE_CHECK("for thread-safe Mesa version", 
+		       wine_cv_mesa_version_threadsafe,
+                       [saved_libs=$LIBS
+		        LIBS="$X_LIBS -lGL"
+			AC_TRY_LINK([],[pthread_getspecific();],
+				    [wine_cv_mesa_version_threadsafe="yes"],
+				    [wine_cv_mesa_version_threadsafe="no"])
+			LIBS=$saved_libs]
+	)
+
+        if test "$wine_cv_mesa_version_OK" = "yes" -a "$wine_cv_mesa_version_threadsafe" = "no"
         then
 	    dnl Check for the presense of the library
             AC_CHECK_LIB(GL,glXCreateContext,AC_DEFINE(HAVE_LIBMESAGL) X_PRE_LIBS="$X_PRE_LIBS -lGL",,$X_LIBS -lXext -lX11 -lm $X_EXTRA_LIBS)
@@ -1086,7 +1097,15 @@ if test "$wine_cv_mesa_version_OK" = "no"
 then
   echo
   echo "*** Warning: old Mesa headers detected. Wine will be built without Direct3D"
-  echo "*** support. Consider upgrading your Mesa libraries (http://www.mesa3d.org/)"
+  echo "*** support. Consider upgrading your Mesa libraries (http://www.mesa3d.org/)."
+fi
+
+if test "$wine_cv_mesa_version_threadsafe" = "yes"
+then
+  echo
+  echo "*** Warning: the OpenGL version you have installed relies on libpthread for"
+  echo "*** thread-safety. To prevent crashes, OpenGL support has been removed"
+  echo "*** (while we work on a better fix)."
 fi
 
 echo