sip-build using C compiler for .cpp files when not using pyqt-builder?

[Phil Thompson]

According to the setuptools docs setting the CPPFLAGS environment 
variable might work.

Phil

On 08/10/2022 14:49, Patrick Stinson wrote:
> So then with:
> 
> extra-compile-args = ["-std=c++11"]
> 
> you get this for the .c files:
> 
> error: invalid argument '-std=c++11' not allowed with 'C'
> 
> On Sat, Oct 8, 2022 at 5:47 AM Patrick Stinson <patrickkidd at gmail.com>
> wrote:
> 
>> Yeah, ok. It compiles fine on ubuntu. I think this is actually a 
>> problem
>> in the default c++ spec for clang 14.0.0 on macos 12.6, for example 
>> these
>> warnings and errors:
>> 
>> warning: scoped enumerations are a C++11 extension 
>> [-Wc++11-extensions]
>> error: unknown type name 'constexpr'
>> 
>> On Fri, Oct 7, 2022 at 12:25 AM Phil Thompson 
>> <phil at riverbankcomputing.com>
>> wrote:
>> 
>>> On 06/10/2022 19:25, Patrick Stinson wrote:
>>> > I have a pure C++ sip extension and it looks like sip-build is using
>>> > the C
>>> > compiler for everything. My other extension that sues pyqt-builder
>>> > seems to
>>> > work. Is there a way to get sip to use the c++ compiler for cpp files
>>> > while
>>> > also correctly compiling sip's C files like sip_array.c etc?
>>> >
>>> > Using sip-6.7.1.
>>> >
>>> > Cheers,
>>> > -Patrick
>>> 
>>> By default (ie. when you are not using PyQt-builder) SIP will use
>>> setuptools to do the build. It will call the correct compiler 
>>> depending
>>> on the filename extension. Works fine for me.
>>> 
>>> Phil
>>> 
>>