Added facility to compile Mesa EGL implementation. Fixed a few issues so that...

third_party/mesa/MesaLib/src/egl/main/eglconfig.h

 #ifndef EGLCONFIG_INCLUDED
 #define EGLCONFIG_INCLUDED
 
 
 #include <assert.h>
 #include "egltypedefs.h"
 
 
 #define _EGL_CONFIG_FIRST_ATTRIB EGL_BUFFER_SIZE
 #define _EGL_CONFIG_LAST_ATTRIB EGL_CONFORMANT
@@ skipping 31 matching lines @@
  */
 static INLINE EGLint
 _eglIndexConfig(const _EGLConfig *conf, EGLint key)
 {
    (void) conf;
    if (key >= _EGL_CONFIG_FIRST_ATTRIB &&
        key < _EGL_CONFIG_FIRST_ATTRIB + _EGL_CONFIG_NUM_CONTIGUOUS_ATTRIBS)
       return key - _EGL_CONFIG_FIRST_ATTRIB;
    
    switch (key) {
+#ifdef EGL_NOK_texture_from_pixmap
    case EGL_Y_INVERTED_NOK:
       return _EGL_CONFIG_FIRST_EXTRA_ATTRIB;
+#endif
    default:
       return -1;
    }
 }
 
 
 /**
  * Reset all keys in the config to a given value.
  */
 static INLINE void
@@ skipping 99 matching lines @@
 
 extern EGLBoolean
 _eglGetConfigAttrib(_EGLDriver *drv, _EGLDisplay *dpy, _EGLConfig *conf, EGLint attribute, EGLint *value);
 
 
 extern EGLBoolean
 _eglGetConfigs(_EGLDriver *drv, _EGLDisplay *dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config);
 
 
 #endif /* EGLCONFIG_INCLUDED */