[GRASS-dev] oproj void** invalid conversion

[Glynn Clements]

Andreas Jochem wrote:

> I am trying to convert Coordinates to lat / long. I would like to save 
> the output projection parameters in oproj.
> 
> But the compiler is complaining.
> 
> error: invalid conversion from �void*� to �void**�.
> 
> If I use *oproj.pj instead of oproj.pj the compiler doesn't complain 
> anymore but the transformation to lat / long does not work.
> 
> The code is following below.
> 
> Does anybody know this problem. I used this code a couple of months ago 
> and it worked.

The type of the "pj" field of "struct pj_info" was wrong (projPJ is a
typedef for "void *").

It was corrected in r33949 (7.0) and r33951 (6.4):

	http://trac.osgeo.org/grass/changeset/33949

	http://trac.osgeo.org/grass/changeset/33951

> if ((oproj.pj = pj_latlong_from_proj(iproj.pj)) == NULL)
>   G_fatal_error("Unable to set up lat/long projection parameters");

This code is correct. If it generates a warning, your
<grass/gprojects.h> file is out of date. It should still work, though.

Using *oproj.pj will never work.

-- 
Glynn Clements <glynn at gclements.plus.com>