problem building python 3.5 extensions for windows

[Robin Becker]

.........
>
> This also sounds like the C++ stuff just wasn't installed.  I'm afraid
> reinstallation is probably your best bet.
>
I used the default installation, but it failed first time around (perhaps a 
network thing) and I stupidly assumed 'repair' would work.

After a full reinstallation at least vcvarsall is present and  I can at least 
get the amd64/x86 compilers to work with bdist_wheel (I didn't get any errors 
from using my already compiled relocatable libs) and I can no build the open 
source reportlab extensions.

One simple extension

https://bitbucket.org/rptlab/pyrxp

doesn't get built. For some reason I get a hang in the linker for both amd64 & 
x86. This builds fine for 27, 33 & 34.


However, I see this in the output

          | creating C:\ux\XB33\repos\pyRXP\build\lib.win-amd64-3.5
          | C:\Program Files (x86)\Microsoft Visual Studio 
14.0\VC\BIN\amd64\link.exe /nologo /INCREMENTAL:NO /LTCG /DLL
/MANIFEST:EMBED,ID=2 /MANIFESTUAC:NO /LIBPATH:C:\ux\XB33\py35_amd64\libs 
/LIBPATH:C:\python35\libs /LIBPATH:C:\python35
/LIBPATH:C:\ux\XB33\py35_amd64\PCbuild\amd64 "/LIBPATH:C:\Program Files 
(x86)\Microsoft Visual Studio 14.0\VC\LIB\amd64"
  "/LIBPATH:C:\Program Files (x86)\Microsoft Visual Studio 
14.0\VC\ATLMFC\LIB\amd64" "/LIBPATH:C:\Program Files (x86)\Win
dows Kits\10\lib\10.0.10150.0\ucrt\x64" "/LIBPATH:C:\Program Files (x86)\Windows 
Kits\NETFXSDK\4.6\lib\um\x64" "/LIBPATH
:C:\Program Files (x86)\Windows Kits\8.1\lib\winv6.3\um\x64" wsock32.lib 
/EXPORT:PyInit_pyRXPU build\temp.win-amd64-3.5\
Release\ux\XB33\repos\pyRXP\src\pyRXP.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\xmlparser.obj bui
ld\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\url.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\s
rc\rxp\charset.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\string16.obj 
build\temp.win-amd64-3.5\Re
lease\ux\XB33\repos\pyRXP\src\rxp\ctype16.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\dtd.obj build
\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\input.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\s
rc\rxp\stdio16.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\system.obj 
build\temp.win-amd64-3.5\Rele
ase\ux\XB33\repos\pyRXP\src\rxp\hash.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\version.obj build\
temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\namespaces.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyR
XP\src\rxp\http.obj 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\rxp\nf16check.obj 
build\temp.win-amd64-3.5\
Release\ux\XB33\repos\pyRXP\src\rxp\nf16data.obj 
/OUT:build\lib.win-amd64-3.5\pyRXPU.cp35-win_amd64.pyd /IMPLIB:build\te
mp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\pyRXPU.cp35-win_amd64.lib

          | pyRXP.obj : warning LNK4197: export 'PyInit_pyRXPU' specified 
multiple times; using first specification
          |    Creating library 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\pyRXPU.cp35-win_amd64.lib 
and ob
ject 
build\temp.win-amd64-3.5\Release\ux\XB33\repos\pyRXP\src\pyRXPU.cp35-win_amd64.exp


          | Generating code
Stderr:  | error: command 'C:\\Program Files (x86)\\Microsoft Visual Studio 
14.0\\VC\\BIN\\amd64\\link.exe' failed with
exit status 1

so there are some warnings which I don't understand. Maybe I need to do 
something special for pyRXP (possibly I have some ifdefs poorly configured).
-- 
Robin Becker