include files for cgxCADTools

[Joshua Root]

If you're patching the Makefile, patch it to use $CXX when building C++ 
code.

- Josh

On 2022-8-9 02:22 , Mark Brethen wrote:
> The makefile only sets cc, not c++. If I remove -lstc++ from LIBS, then I need to add it to the portfile using LDFLAGS. The Makefile uses LFLAGS, which I don’t want to override. Should I add LDFLAGS to MAIN, like so:
> 
> $(MAIN): $(OBJS)
> 	$(CC) $(CFLAGS) $(INCLUDES) -o $(MAIN) $(OBJS) $(LFLAGS) $(LIBS) $(LDFLAGS)
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> Mark Brethen
> mark.brethen at gmail.com
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> 
>> On Aug 8, 2022, at 11:10 AM, Joshua Root <jmr at macports.org> wrote:
>>
>> That's a completely different thing. The language standard is selected by -std, the stdlib implementation is selected by -stdlib, and linking to a stdlib directly (as -lstdc++ does) is usually a bug since the C++ compiler will implicitly add the appropriate stdlib when linking.
>>
>> - Josh
>>
>> On 2022-8-9 01:16 , Mark Brethen wrote:
>>> There is also -lstdc++, I thought those should be set in the Portfile. Doesn’t macports-clang have its own standard?
>>> Mark Brethen
>>> mark.brethen at gmail.com <mailto:mark.brethen at gmail.com>
>>>> On Aug 7, 2022, at 7:22 PM, Ryan Schmidt <ryandesign at macports.org <mailto:ryandesign at macports.org>> wrote:
>>>>
>>>> In fact, the Makefile already had -std=c++11, but your patchfile removed it. So don't remove it.
>>
>