New comment by manfredu on void-packages repository

https://github.com/void-linux/void-packages/pull/21674#issuecomment-778036712

Comment:
> You need to identify the message `checking loader paths for Qt libs` and which binary `configure` actually tries to run there.
> 
> Then you can either patch configure to get this information in some way which does not require running a target binary, or you can add `build_helper="qemu"` and try to patch configure to run that `somebinary` with `qemu-${XBPS_TARGET_QEMU_MACHINE}-static somebinary ...`.

@pullmoll 

It fails with "loader cannot find Qt library" when cross-compiling in the following part of configure:

```
OCPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS -I$QT_INC"
OLIBS="$LIBS"
LIBS="$LIBS $QT_LIBS"

OLDFLAGS="$LDFLAGS"
LDFLAGS="$LDFLAGS -Wl,-rpath,$($QMAKE -query QT_INSTALL_LIBS)"


 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h.  */

		#include <QtCore/QtGlobal>
		#include <cstring>
		int main () {
		return strcmp(QT_VERSION_STR, qVersion()) != 0;
		}
_ACEOF
if ac_fn_cxx_try_run "$LINENO"; then :
...
else
  { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
as_fn_error $? "loader cannot find Qt library
See \`config.log' for more details" "$LINENO" 5; }
			LDFLAGS="$OLDFLAGS"

fi
```

For the time being I have disabled cross-compiling. Any other suggestion?

I'm still checking why one test is failing with i686 only...