[Haskell-cafe] A question regarding reading CPP definitions from a C header

[Carl Howells]

Have you looked into using hsc2hs? If I understand your problem, it's
designed exactly to solve it.

-- 
Carl


On Mon, Oct 7, 2013 at 12:20 PM, ?mer Sinan A?acan <omeragacan at gmail.com>wrote:

> Thanks for your answer, looks like this is my only option to do this.
>
> Can you provide some information about what does parameters of
> runCpphsReturningSymTab stands for? I made several attempts but
> couldn't get any useful return value.
>
> For example, I have no idea what does third parameter does. Also,
> second parameter.
>
> Thanks,
>
> ---
> ?mer Sinan A?acan
> http://osa1.net
>
>
> 2013/10/7 Malcolm Wallace <malcolm.wallace at me.com>:
> > If you use cpphs as a library, there is an API called
> runCpphsReturningSymTab.  Thence you can throw away the actual
> pre-preprocessed result text, keep only the symbol table, and lookup
> whatever macros you wish to find their values.  I suggest you make this
> into a little code-generator, to produce a Haskell module containing the
> values you need.
> >
> > On 5 Oct 2013, at 21:37, ?mer Sinan A?acan wrote:
> >
> >> Hi all,
> >>
> >> Let's say I want to #include a C header file in my Haskell library
> >> just to read some macro definitions. The C header file also contains
> >> some C code. Is there a way to load only macro definitions and not C
> >> code in #include declarations in Haskell?
> >>
> >> What I'm trying to do is I'm linking my library against this C library
> >> but I want to support different versions of this C library, so I want
> >> to read it's version from one of it's header files. The problem is the
> >> header file contains some C code and makes my Haskell source code
> >> mixed with C source before compilation.
> >>
> >> Any suggestions would be appreciated,
> >
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