How to set the file name and line number after tangle?

[ceving]

I create my JavaScript source by tangling a Markdown file and passing the code as stdin to the Closure compiler. All warnings and error message of the compiler are prefixed by "stdin". In the following example stdin:7 should be line 61 in my Markdown source.

stdin:7:4: ERROR - [JSC_UNDEFINED_VARIABLE] variable asw is undeclared

I would like to extend my tangle to add some pragmas to my JavaScript to get the file name and line number right as it is done by CPP. How can I do this?