Check dependencies of MBEDTLS_MEMORY_BACKTRACE in check_config.h
diff --git a/include/mbedtls/check_config.h b/include/mbedtls/check_config.h
index 1bf4229..68dc474 100644
--- a/include/mbedtls/check_config.h
+++ b/include/mbedtls/check_config.h
@@ -303,6 +303,10 @@
#error "MBEDTLS_MEMORY_BUFFER_ALLOC_C defined, but not all prerequisites"
#endif
+#if defined(MBEDTLS_MEMORY_BACKTRACE) && !defined(MBEDTLS_MEMORY_BUFFER_ALLOC_C)
+#error "MBEDTLS_MEMORY_BACKTRACE defined, but not all prerequesites"
+#endif
+
#if defined(MBEDTLS_PADLOCK_C) && !defined(MBEDTLS_HAVE_ASM)
#error "MBEDTLS_PADLOCK_C defined, but not all prerequisites"
#endif