[Proj] [MS Windows] PVALUE causes problems with mingw64 compilers

[sisyphus1 at optusnet.com.au]

Hi,

The problem arises when the mingw64 header winreg.h gets included.
We then get errors like:

C:/tmp64ng/c/include/projects.h:161:47: error: conflicting types for 
'PVALUE'
  typedef union { double  f; int  i; char *s; } PVALUE;
....
C:/tmp64ng/c/x86_64-w64-mingw32/include/winreg.h:75:3: note: previous 
declaration of 'PVALUE' was here
    __MINGW_TYPEDEF_AW(PVALUE)
    ^

The fairly simple (though tedious) workaround is, prior to building proj, 
change each of the few occurrences of "PVALUE" in the proj source to a 
symbol that doesn't clash.
(I've been using "_P_VALUE", but perhaps something like "PROJVALUE" is a 
better choice .... I'm happy with *any* symbol that's not going to clash.)

Could the proj developers please rename "PVALUE" to something that doesn't 
clash ?
I really would like to not have to alter the proj source in future proj 
releases.

I did raise this matter a few years ago but, as nothing was ever done, I 
thought that maybe I should instead submit a bug report along with a patch.
However, AFAICT, to submit a bug report I need to go to 
http://www.osgeo.org/osgeo_userid/ and create a user id so that I can first 
log in.

Unfortunately the link to "this simple form" ( 
https://www.osgeo.org/cgi-bin/ldap_create_user.py ) results in a "page can't 
be displayed error" for me.
There's a suggestion there that this could be a problem with my browser 
settings, though I don't usually have any trouble with secure connections.

Is there any other way I can create a user id ?

Cheers,
Rob