diff --git a/configure b/configure
index 412828e9bae6d0b7346c2c7667846828e2bc5ddf..853541d5912acf6a68441deffbbf97164ab6a1ba 100755
--- a/configure
+++ b/configure
@@ -554,6 +554,8 @@ echo "  --source-path=PATH       path of source code [$source_path]"
 echo "  --cross-prefix=PREFIX    use PREFIX for compile tools [$cross_prefix]"
 echo "  --cc=CC                  use C compiler CC [$cc]"
 echo "  --host-cc=CC             use C compiler CC [$host_cc] for dyngen etc."
+echo "  --extra-cflags=CFLAGS    add C compiler flags CFLAGS"
+echo "  --extra-ldflags=LDFLAGS  add linker flags LDFLAGS"
 echo "  --make=MAKE              use specified make [$make]"
 echo "  --install=INSTALL        use specified install [$install]"
 echo "  --static                 enable static build [$static]"