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From: Thomas Morgan <tlm@ziiuu.com>
Subject: Adding source location information when tangling
Date: Sun, 25 May 2014 18:28:11 +0200
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To: emacs-orgmode@gnu.org

Dear Org hackers,

I have a question about tangling LilyPond code blocks.

Is there a way to put the commands `\sourcefilename' and
`\sourcefileline' in the tangled file before each block,
perhaps in place of the comment that includes the same information?
(These commands are equivalent to the `#line LINENUM "FILE"'
directive in C.)  If possible I'd like to let LilyPond know how
to give error messages that refer to the originating Org file.

Thanks,
Thomas