"Dimitry Golubovsky" wrote:

Is this a bug or a feature that cpphs does not pass the #pragma cpp directive (they disappear in the output)?

A feature I suppose. At least, it was a deliberate design choice. The purpose of cpphs is to remove all # directives from the file, leaving only Haskell (or plain text if you prefer). Now I realise that this is not entirely true, since cpphs _does_ leave #line droppings unless you specify the --noline option. But although most Haskell implementations do read and use #line hints, I was not aware of any tools that make further use of #pragma, and indeed quite the opposite - many tools break if they see the latter.

In version 0.6 of cpphs: * Recognise and ignore the #pragma cpp directive.

Or what command line options could be used to preserve #pragma's in cpphs output?

I am happy to add an option (--pragmas maybe?) to preserve #pragma if there is user demand. Check the cpphs darcs repository at http://www.cs.york.ac.uk/fp/darcs/cpphs for new patches. Regards, Malcolm