Re: [Plplot-devel] Support for Tcl under Windows - almost ready

[Arjen M. <arj...@wl...>]

Alan W. Irwin wrote:

>
>>
>> 2. Due to some problem in determining the build parameters
>>   via the CMake module FindTclsh, I simply set the parameter
>>   TCL_TCLSH to "tclsh". This is not very nice, but it was an
>>   easy hack. **TODO: find out if "tclsh" is present **
>
>
> I strongly prefer that INCLUDE(FindTclsh) continue to be used.  Please 
> have
> a look at the CMake module FindTclsh.cmake which is extremely simple.
>
The problem I had noticed before when I used INCLUDE(FindTclsh) is most 
probably a
problem I have seen from time to time, but which is not at all related 
to that module:
- I remove the cache file in the root directory to get CMake to 
recompute everything
- When it reaches the subdirectories it complains it can not remove the 
cache files
  found there.
- When I rerun CMake (again removing the cache file in the root), the 
messages
  are gone.

This does not happen all the time, which makes it a rather bizarre 
phenomenon.

For the moment I choose to ignore it. And put back the INCLUDE.

>>
>> While this enabled the CBS to build the library, I can not run the
>> examples yet - pltcl.exe can not properly initialise itself due to
>> a lack of initialisation files and the location of the PLplot library.
>>
>> This will require some further investigation, but I am too thrilled
>> about what I have achieved so far, to first sort out all odds and ends.
>
>
> I am also thrilled that your CBS and source code changes make it 
> possible to
> build the plplottcltk library on windows. Good luck in figuring out 
> how to
> actually use that library on windows.  Assuming that it is shared, do you
> have to make some PLDLLIMPEXP changes?

It has indeed everything to do with exports/imports:

[  1%] Built target csirocsa
[  2%] Built target plhershey-unicode-gen
[  3%] Built target plhershey-unicode.h_built
[ 39%] Built target plplotd
[ 39%] Built target pkgIndex.tcl
[ 40%] Built target plplotcxxd
[ 40%] Built target plplot.tcl_target
[ 42%] Built target tclmatrixd
Linking C shared library plplottcltkd.dll
tclAPI.obj : error LNK2001: unresolved external symbol _plplotLibDir
tclAPI.obj : error LNK2001: unresolved external symbol _plstrdup
tclAPI.obj : error LNK2001: unresolved external symbol _plInBuildTree
tclAPI.obj : error LNK2001: unresolved external symbol _plsc
tclAPI.obj : error LNK2001: unresolved external symbol _Tcl_GetMatrixPtr

Some of these are simply functions that need to be exported in the
PLplot library itself, but there is also plsc - a global variable. 

I am not sure how I can export global variables, but I will inquire 
about it.

(The issue will arise with other language bindings too, as they also
have DLLs that use the PLplot DLL. Most probably there will be 
more exports needed.)

Regards,

Arjen
plplottcltkd.dll : fatal error LNK1120: 5 unresolved externals