[racket] Racket 5.3.4 doesn't build aginst libpng 1.6

On Wed, May 15, 2013 at 10:39 PM, Matthew Flatt <mflatt at cs.utah.edu> wrote:

> When I tried libpng 1.6.2, it didn't work because PNG_LIBPNG_VER_STRING
> includes a minor version number. I've pushed a repair for that problem,
> and the patch should apply to v5.3.4:
>
>
> https://github.com/plt/racket/commit/5629a6156a5720e51a277849f75b3135cb93664f
>
>
Thanks. The patch works.


> At Sat, 11 May 2013 09:32:49 -0600, Matthew Flatt wrote:
> > The `racket/gui' library looks for "libpng15", "libpng12", and just
> > "libpng", in that order.
> >
> > So, maybe it should also look for "libpng16", which I'm guessing is
> > the name of the libpng 1.6.2 library?
> >
> > You can try adjusting
> >
> >  collects/racket/draw/unsafe/png.rkt
> >
> > to see if it works with "libpng16", or you could link "libpng.so" in
> > the Racket "lib" directory to libpng16.so".
> >
> > At Fri, 10 May 2013 18:23:01 -0400, Eric Bélanger wrote:
> > > I'm trying to build racket 5.3.4 but I'm getting many similar errors:
> > > png_structp->C: argument is not non-null `png_structp' pointer
> > >   argument: #f
> > >
> > > I found out that this only happens with libpng 1.6.2. It builds fine
> if I
> > > use libpng 1.5.15.
> > >
> > > Does anyone have a fix?
> > >
> > > Thanks.
> > > ____________________
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> >
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>
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