-/* these ones live in str.h, but redeclare them here so that we do
- not need to load the whole str.h and its heavy dependencies */
-#ifndef __USE_GNU /* do not redeclare existing headers */
-XBT_PUBLIC(int) asprintf(char **ptr, const char *fmt, /*args */
- ...) _XBT_GNUC_PRINTF(2, 3);
-XBT_PUBLIC(int) vasprintf(char **ptr, const char *fmt, va_list ap);
+#ifdef XBT_LOG_LOCALLY_DEFINE_XBT_CHANNEL
+XBT_LOG_NEW_CATEGORY(xbt, "All XBT categories (simgrid toolbox)");
+XBT_LOG_NEW_SUBCATEGORY(xbt_help, xbt, "Help messages");
+#else
+XBT_LOG_EXTERNAL_CATEGORY(xbt);
+XBT_LOG_EXTERNAL_CATEGORY(xbt_help);