Document how to generate ffi_parser.c

diff --git a/ext/ffi/ffi.g b/ext/ffi/ffi.g
index 509ebf6459736038e3727f7e473c1d7edae56649..e99f951f900d00aa8dfe44588b45a42c44c3bf6b 100644 (file)
--- a/ext/ffi/ffi.g
+++ b/ext/ffi/ffi.g
@@ -16,6 +16,11 @@
    +----------------------------------------------------------------------+
 */
 
+/*
+To generate ffi_parser.c use llk <https://github.com/dstogov/llk>:
+php llk.php ffi.g
+*/
+
 %start          declarations
 %sub-start      type_name
 %case-sensetive true