+void GLAPIENTRY
+_mesa_NamedFramebufferReadBuffer_no_error(GLuint framebuffer, GLenum src);
+
+extern void GLAPIENTRY
+_mesa_NamedFramebufferReadBuffer(GLuint framebuffer, GLenum src);
+
+extern void GLAPIENTRY
+_mesa_FramebufferDrawBufferEXT(GLuint framebuffer, GLenum buf);
+
+extern void GLAPIENTRY
+_mesa_FramebufferReadBufferEXT(GLuint framebuffer, GLenum buf);