[Bug 812] New: Drivers don't have _glapi_DispatchTSD weak symbol

[<bug...@pd...>]

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http://freedesktop.org/bugzilla/show_bug.cgi?id=812   
   
           Summary: Drivers don't have _glapi_DispatchTSD weak symbol
           Product: DRI
           Version: DRI CVS
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: General
        AssignedTo: dri...@li...
        ReportedBy: id...@us...


As the TLS work progress, the convention used by drivers to get the pointer to
the current dispatch table from libGL changes.  In single-threaded mode, the
variable _glapi_DispatchTSD holds a pointer to the dispatch table.  In
multi-threaded mode, that variable is NULL, and the function _glapi_get_dispatch
must be called.  In order to support older versions of libGL (i.e., ones that
don't have _glapi_DispatchTSD) an ELF "weak" symbol was added to dri_util.c.

For drivers built in the Mesa tree, this symbol shows up, as weak, in the
*_dri.so files.  However, the *_dri.so files built in the DRI don't have it. 
The net result is these drivers won't work with, for example, the libGL from the
current Xorg tree.  I suspect that the problem is just the options passed to gcc
when the *_dri.so is linked.   
   
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