New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/26962#issuecomment-761865705

Comment:
Well, it would seem the issue is once again that `shiboken` is running `clang` as a compiler for the host... If we switch the armv6l builder to i686, this won't happen, but it will still be doing the wrong thing:

the full error is:

```
/usr/arm-linux-musleabihf/usr/include/qt5/QtCore/qbasicatomic.h:97:5: error: static_assert failed due to requirement 'bool(QAtomicOpsSupport<8
>::IsSupported)' "template parameter is an integral of a size not supported on this platform"
/usr/arm-linux-musleabihf/usr/include/qt5/QtCore/qsemaphore.h:70:39: note: in instantiation of template class 'QBasicAtomicInteger<unsigned lo
ng long>' requested here
```

where in `qsemaphore.h` we have:

```
    union {
        QSemaphorePrivate *d;
        QBasicAtomicInteger<quintptr> u;        // ### Qt6: make 64-bit
    };
```

and `quintptr` is defined to

```
#ifndef __cplusplus
// In C++ mode, we define below using QIntegerForSize template
Q_STATIC_ASSERT_X(sizeof(ptrdiff_t) == sizeof(size_t), "Weird ptrdiff_t and size_t definitions");
typedef ptrdiff_t qptrdiff;
typedef ptrdiff_t qsizetype;
typedef ptrdiff_t qintptr;
typedef size_t quintptr;
#endif
[...]
/*
  quintptr and qptrdiff is guaranteed to be the same size as a pointer, i.e.

      sizeof(void *) == sizeof(quintptr)
      && sizeof(void *) == sizeof(qptrdiff)

  size_t and qsizetype are not guaranteed to be the same size as a pointer, but
  they usually are.
*/
template <int> struct QIntegerForSize;
template <>    struct QIntegerForSize<1> { typedef quint8  Unsigned; typedef qint8  Signed; };
template <>    struct QIntegerForSize<2> { typedef quint16 Unsigned; typedef qint16 Signed; };
template <>    struct QIntegerForSize<4> { typedef quint32 Unsigned; typedef qint32 Signed; };
template <>    struct QIntegerForSize<8> { typedef quint64 Unsigned; typedef qint64 Signed; };
#if defined(Q_CC_GNU) && defined(__SIZEOF_INT128__)
template <>    struct QIntegerForSize<16> { __extension__ typedef unsigned __int128 Unsigned; __extension__ typedef __int128 Signed; };
#endif
template <class T> struct QIntegerForSizeof: QIntegerForSize<sizeof(T)> { };
typedef QIntegerForSize<Q_PROCESSOR_WORDSIZE>::Signed qregisterint;
typedef QIntegerForSize<Q_PROCESSOR_WORDSIZE>::Unsigned qregisteruint;
typedef QIntegerForSizeof<void*>::Unsigned quintptr;
```