cython build error PyMemoryView_CheckExact

[totaam]

Was wrongly attributed to clang in 11cca36.

C:/msys64/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/13.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: build/temp.ming
w_x86_64-cpython-311/xpra/buffers/cyxor.o: in function `__pyx_pf_4xpra_7buffers_5cyxor_xor_str':
E:\xpra/xpra/buffers/cyxor.c:3263:(.text+0x2aef): undefined reference to `PyMemoryView_CheckExact'
collect2.exe: error: ld returned 1 exit status
error: command 'C:\\msys64\\mingw64\\bin/gcc.exe' failed with exit code 1

Caused by this function signature:

xpra/xpra/buffers/cyxor.pyx

Line 19 in 7ee6be3

def xor_str(a, b) -> memoryview:

[totaam]

Caused by #4110, was added in c623055.

No idea why this only fails on MS Windows!
This should be reported upstream.

[totaam]

Also seen on Linux with CC=clang, see also 11cca36 + 6907219

[totaam]

Also seen on Linux Fedora 40.