Make visible symbols required by xorg modules.

This patch exports all symbols required by the compilable
(in a x86 linux computer) xorg/driver/* modules.
  Still missing symbols worth mentioning are:

sunleo
	miFindMaxBand no longer available

intel	(uxa/uxa-accel.c)
	fbShmPutImage no longer available (and should have been static)

mga
	MGAGetClientPointer (should come from matrox's libhal)

  This is not a definitive "visibility" patch, as all it does is to
export missing symbols, but the modules that current don't compile,
may require more symbols once fixed, and third party drivers should
also require more symbols exported.
  A "definitive" patch should export symbols defined in the sdk.

hw/xfree86/dri/dri.c

@@ -315,7 +315,7 @@ dri_crtc_notify(ScreenPtr pScreen)
     pDRIPriv->xf86_crtc_notify = xf86_wrap_crtc_notify(pScreen, dri_crtc_notify);
 }
 
-Bool
+_X_EXPORT Bool
 DRIScreenInit(ScreenPtr pScreen, DRIInfoPtr pDRIInfo, int *pDRMFD)
 {
     DRIScreenPrivPtr    pDRIPriv;
@@ -594,7 +594,7 @@ DRIScreenInit(ScreenPtr pScreen, DRIInfoPtr pDRIInfo, int *pDRMFD)
     return TRUE;
 }
 
-Bool
+_X_EXPORT Bool
 DRIFinishScreenInit(ScreenPtr pScreen)
 {
     DRIScreenPrivPtr  pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -640,7 +640,7 @@ DRIFinishScreenInit(ScreenPtr pScreen)
     return TRUE;
 }
 
-void
+_X_EXPORT void
 DRICloseScreen(ScreenPtr pScreen)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -812,7 +812,7 @@ DRIReset(void)
      */
 }
 
-Bool
+_X_EXPORT Bool
 DRIQueryDirectRenderingCapable(ScreenPtr pScreen, Bool* isCapable)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -825,7 +825,7 @@ DRIQueryDirectRenderingCapable(ScreenPtr pScreen, Bool* isCapable)
     return TRUE;
 }
 
-Bool
+_X_EXPORT Bool
 DRIOpenConnection(ScreenPtr pScreen, drm_handle_t * hSAREA, char **busIdString)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -836,7 +836,7 @@ DRIOpenConnection(ScreenPtr pScreen, drm_handle_t * hSAREA, char **busIdString)
     return TRUE;
 }
 
-Bool
+_X_EXPORT Bool
 DRIAuthConnection(ScreenPtr pScreen, drm_magic_t magic)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -845,13 +845,13 @@ DRIAuthConnection(ScreenPtr pScreen, drm_magic_t magic)
     return TRUE;
 }
 
-Bool
+_X_EXPORT Bool
 DRICloseConnection(ScreenPtr pScreen)
 {
     return TRUE;
 }
 
-Bool
+_X_EXPORT Bool
 DRIGetClientDriverName(ScreenPtr pScreen,
                        int *ddxDriverMajorVersion,
                        int *ddxDriverMinorVersion,
@@ -1014,7 +1014,7 @@ DRIDestroyDummyContext(ScreenPtr pScreen, Bool hasCtxPriv)
     pDRIPriv->dummyCtxPriv = NULL;
 }
 
-Bool
+_X_EXPORT Bool
 DRICreateContext(ScreenPtr pScreen, VisualPtr visual,
                  XID context, drm_context_t * pHWContext)
 {
@@ -1050,7 +1050,7 @@ DRICreateContext(ScreenPtr pScreen, VisualPtr visual,
     return TRUE;
 }
 
-Bool
+_X_EXPORT Bool
 DRIDestroyContext(ScreenPtr pScreen, XID context)
 {
     FreeResourceByType(context, DRIContextPrivResType, FALSE);
@@ -1233,7 +1233,7 @@ DRIDecreaseNumberVisible(ScreenPtr pScreen)
     DRIDriverClipNotify(pScreen);
 }
 
-Bool
+_X_EXPORT Bool
 DRICreateDrawable(ScreenPtr pScreen, ClientPtr client, DrawablePtr pDrawable,
 		  drm_drawable_t * hHWDrawable)
 {
@@ -1345,7 +1345,7 @@ DRIDestroyDrawableCB(pointer value, XID id, pointer data)
     return FALSE;
 }
 
-Bool
+_X_EXPORT Bool
 DRIDestroyDrawable(ScreenPtr pScreen, ClientPtr client, DrawablePtr pDrawable)
 {
     if (pDrawable->type == DRAWABLE_WINDOW) {
@@ -1386,7 +1386,7 @@ DRIDrawablePrivDelete(pointer pResource, XID id)
     }
 }
 
-Bool
+_X_EXPORT Bool
 DRIGetDrawableInfo(ScreenPtr pScreen,
                    DrawablePtr pDrawable,
                    unsigned int* index,
@@ -1558,7 +1558,7 @@ DRIGetDrawableInfo(ScreenPtr pScreen,
     return TRUE;
 }
 
-Bool
+_X_EXPORT Bool
 DRIGetDeviceInfo(ScreenPtr pScreen,
                  drm_handle_t * hFrameBuffer,
                  int* fbOrigin,
@@ -1579,7 +1579,7 @@ DRIGetDeviceInfo(ScreenPtr pScreen,
     return TRUE;
 }
 
-DRIInfoPtr
+_X_EXPORT DRIInfoPtr
 DRICreateInfoRec(void)
 {
     DRIInfoPtr inforec = (DRIInfoPtr)xcalloc(1, sizeof(DRIInfoRec));
@@ -1605,7 +1605,7 @@ DRICreateInfoRec(void)
     return inforec;
 }
 
-void
+_X_EXPORT void
 DRIDestroyInfoRec(DRIInfoPtr DRIInfo)
 {
     if (DRIInfo->busIdString) xfree(DRIInfo->busIdString);
@@ -1613,7 +1613,7 @@ DRIDestroyInfoRec(DRIInfoPtr DRIInfo)
 }
 
 
-void
+_X_EXPORT void
 DRIWakeupHandler(pointer wakeupData, int result, pointer pReadmask)
 {
     int i;
@@ -1629,7 +1629,7 @@ DRIWakeupHandler(pointer wakeupData, int result, pointer pReadmask)
     }
 }
 
-void
+_X_EXPORT void
 DRIBlockHandler(pointer blockData, OSTimePtr pTimeout, pointer pReadmask)
 {
     int i;
@@ -2156,7 +2156,7 @@ DRIClipNotify(WindowPtr pWin, int dx, int dy)
     }
 }
 
-CARD32
+_X_EXPORT CARD32
 DRIGetDrawableIndex(WindowPtr pWin)
 {
     ScreenPtr pScreen = pWin->drawable.pScreen;
@@ -2190,7 +2190,7 @@ DRIPrintDrawableLock(ScreenPtr pScreen, char *msg)
     ErrorF("%s: %d\n", msg,  pDRIPriv->pSAREA->drawable_lock.lock);
 }
 
-void
+_X_EXPORT void
 DRILock(ScreenPtr pScreen, int flags)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -2211,7 +2211,7 @@ DRILock(ScreenPtr pScreen, int flags)
     (*pDRIPriv->pLockRefCount)++;
 }
 
-void
+_X_EXPORT void
 DRIUnlock(ScreenPtr pScreen)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -2236,7 +2236,7 @@ DRIUnlock(ScreenPtr pScreen)
         DRM_UNLOCK(pDRIPriv->drmFD, pDRIPriv->pLSAREA, pDRIPriv->myContext);
 }
 
-void *
+_X_EXPORT void *
 DRIGetSAREAPrivate(ScreenPtr pScreen)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -2245,7 +2245,7 @@ DRIGetSAREAPrivate(ScreenPtr pScreen)
     return (void *)(((char*)pDRIPriv->pSAREA)+sizeof(XF86DRISAREARec));
 }
 
-drm_context_t
+_X_EXPORT drm_context_t
 DRIGetContext(ScreenPtr pScreen)
 {
     DRIScreenPrivPtr pDRIPriv = DRI_SCREEN_PRIV(pScreen);
@@ -2254,7 +2254,7 @@ DRIGetContext(ScreenPtr pScreen)
     return pDRIPriv->myContext;
 }
 
-void
+_X_EXPORT void
 DRIGetTexOffsetFuncs(ScreenPtr pScreen,
 		     DRITexOffsetStartProcPtr *texOffsetStartFunc,
 		     DRITexOffsetFinishProcPtr *texOffsetFinishFunc)
@@ -2278,7 +2278,7 @@ DRIGetWrappedFuncs(ScreenPtr pScreen)
 }
 
 /* note that this returns the library version, not the protocol version */
-void
+_X_EXPORT void
 DRIQueryVersion(int *majorVersion,
                 int *minorVersion,
                 int *patchVersion)
@@ -2349,7 +2349,7 @@ DRIAdjustFrame(int scrnIndex, int x, int y, int flags)
  * REGION_VALIDATE on it, or better yet, save a copy first.
  */
 
-void
+_X_EXPORT void
 DRIMoveBuffersHelper(
    ScreenPtr pScreen, 
    int dx,
@@ -2415,7 +2415,7 @@ DRIMoveBuffersHelper(
 
 }
 
-char *
+_X_EXPORT char *
 DRICreatePCIBusID(const struct pci_device * dev)
 {
     char *busID;