linux: implement gpu plugin

third_party/glew/src/glew.c

 /*
 ** The OpenGL Extension Wrangler Library
 ** Copyright (C) 2002-2008, Milan Ikits <milan ikits[]ieee org>
 ** Copyright (C) 2002-2008, Marcelo E. Magallon <mmagallo[]debian org>
 ** Copyright (C) 2002, Lev Povalahev
 ** All rights reserved.
 ** 
 ** Redistribution and use in source and binary forms, with or without 
 ** modification, are permitted provided that the following conditions are met:
 ** 
@@ skipping 9539 matching lines @@
 
 GLboolean glxewGetExtension (const char* name)
 {    
   GLubyte* p;
   GLubyte* end;
   GLuint len = _glewStrLen((const GLubyte*)name);
   static PFNGLXGETCLIENTSTRINGPROC __glewXGetClientString = NULL;
 /*   if (glXQueryExtensionsString == NULL || glXGetCurrentDisplay == NULL) return GL_FALSE; */
 /*   p = (GLubyte*)glXQueryExtensionsString(glXGetCurrentDisplay(), DefaultScreen(glXGetCurrentDisplay())); */
   if (__glewXGetClientString == NULL) {
-    __glewXGetClientString = (PFNGLXGETCLIENTSTRINGPROC) glewGetProcAddress("glXGetClientString");
+    __glewXGetClientString = (PFNGLXGETCLIENTSTRINGPROC) glewGetProcAddress((const GLubyte *)"glXGetClientString");
   }
   if (__glewXGetClientString == NULL) return GL_FALSE;
   if (glXGetCurrentDisplay == NULL) return GL_FALSE;
   p = (GLubyte*)__glewXGetClientString(glXGetCurrentDisplay(), GLX_EXTENSIONS);
   if (0 == p) return GL_FALSE;
   end = p + _glewStrLen(p);
   while (p < end)
   {
     GLuint n = _glewStrCLen(p, ' ');
     if (len == n && _glewStrSame((const GLubyte*)name, p, n)) return GL_TRUE;
     p += n+1;
   }
   return GL_FALSE;
 }
 
 typedef Bool (* PFNGLXQUERYVERSIONPROC) (Display *dpy, int *major, int *minor);
 
 GLenum glxewContextInit (GLXEW_CONTEXT_ARG_DEF_LIST)
 {
   int major, minor;
   static PFNGLXQUERYVERSIONPROC __glewXQueryVersion = NULL;
   if (__glewXQueryVersion == NULL) {
-    __glewXQueryVersion = (PFNGLXQUERYVERSIONPROC) glewGetProcAddress("glXQueryVersion");
+    __glewXQueryVersion = (PFNGLXQUERYVERSIONPROC) glewGetProcAddress((const GLubyte *)"glXQueryVersion");
   }
   if (__glewXQueryVersion == NULL) return GL_FALSE;
   /* initialize core GLX 1.2 */
   if (_glewInit_GLX_VERSION_1_2(GLEW_CONTEXT_ARG_VAR_INIT)) return GLEW_ERROR_GLX_VERSION_11_ONLY;
   /* initialize flags */
   CONST_CAST(GLXEW_VERSION_1_0) = GL_TRUE;
   CONST_CAST(GLXEW_VERSION_1_1) = GL_TRUE;
   CONST_CAST(GLXEW_VERSION_1_2) = GL_TRUE;
   CONST_CAST(GLXEW_VERSION_1_3) = GL_TRUE;
   CONST_CAST(GLXEW_VERSION_1_4) = GL_TRUE;
@@ skipping 3300 matching lines @@
         }
 #endif
       }
     }
     ret = (len == 0);
   }
   return ret;
 }
 
 #endif /* _WIN32 */