-xbt_error_t gras_trp_tcp_setup(gras_trp_plugin_t plug);
-xbt_error_t gras_trp_file_setup(gras_trp_plugin_t plug);
-xbt_error_t gras_trp_sg_setup(gras_trp_plugin_t plug);
-xbt_error_t gras_trp_buf_setup(gras_trp_plugin_t plug);
+void gras_trp_tcp_setup(gras_trp_plugin_t plug);
+void gras_trp_file_setup(gras_trp_plugin_t plug);
+void gras_trp_sg_setup(gras_trp_plugin_t plug);
+void gras_trp_buf_setup(gras_trp_plugin_t plug);