Windows OSMesa DLL only exports OSMesa functions....

third_party/mesa/mesa.gyp

 # Copyright (c) 2010 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
   },
   'targets': [
     {
       'target_name': 'mesa',
       'type': 'static_library',
       'include_dirs': [
         'MesaLib/include',
         'MesaLib/src/mesa',
       ],
-      'defines': [
-        'BUILD_GL32',
-      ],
       'sources': [
         'MesaLib/src/mesa/main/accum.c',
         'MesaLib/src/mesa/main/api_arrayelt.c',
         'MesaLib/src/mesa/main/api_exec.c',
         'MesaLib/src/mesa/main/api_loopback.c',
         'MesaLib/src/mesa/main/api_noop.c',
         'MesaLib/src/mesa/main/api_validate.c',
         'MesaLib/src/mesa/shader/arbprogparse.c',
         'MesaLib/src/mesa/shader/arbprogram.c',
         'MesaLib/src/mesa/main/arrayobj.c',
@@ skipping 400 matching lines @@
       'target_name': 'osmesa',
       'type': 'shared_library',
       'dependencies': [
         'mesa',
       ],
       'include_dirs': [
         'MesaLib/include',
         'MesaLib/src/mesa',
         'MesaLib/src/mesa/drivers',
       ],
-      'defines': [
-        'BUILD_GL32',
-      ],
       'sources': [
         'MesaLib/src/mesa/drivers/common/driverfuncs.c',
         'MesaLib/src/mesa/drivers/common/driverfuncs.h',
         'MesaLib/src/mesa/drivers/common/meta.c',
         'MesaLib/src/mesa/drivers/common/meta.h',
         'MesaLib/src/mesa/drivers/osmesa/osmesa.c',
+        'MesaLib/src/mesa/drivers/osmesa/osmesa.def',

[Ken Russell (switch to Gerrit), 2010/04/22 23:17:51]

Will this be filtered out on non-Windows platforms by one of the regexps in
common.gypi?

[apatrick_chromium, 2010/04/22 23:19:42]

I believe it will be ignored on other platforms in the same way as files with
the _win.cc suffix. I am waiting for the trybots to confirm.

       ],
     },
   ],
 }