multimedia/webcamoid: Unbreaking clang-built app with USE_GCC=6.0+

[yuri]

Summary

This is a very ugly patch, but it makes Webcamoid run for the users.
Unfortunately, Webcamoid crashes when it is built with clang.
The upstream is investigating. It runs fine when gcc builds it.
USE_GCC in combination with qmake5 hits another bug: Bug#224137: qmake runs g++ command instead of ${CXX}.
This isn't yet fixed by the Qt team, hence another workaround.

I would like to commit this patch for the benefit of users who will be able to run Webcamoid this way, instead of seeing it crashing.

[mat]

multimedia/webcamoid/Makefile

37–39 ↗

(On Diff #36654)

BINARY_ALIAS=  g++=${CXX}

[yuri]

multimedia/webcamoid/Makefile

37–39 ↗

(On Diff #36654)

Thanks for this suggestion!

[yuri]

Using BINARY_ALIAS.

[adamw]

multimedia/webcamoid/Makefile

35 ↗

(On Diff #36657)

This will break if ${CXX} has a space in it. Can this be accomplished with a REINPLACE_CMD instead, or does it need to be a BINARY_ALIAS?

[yuri]

multimedia/webcamoid/Makefile

35 ↗

(On Diff #36657)

This, unfortunately, can't be accomplished with REINPLACE_CMD because the problem is in the qmake5 port. Bare g++ occurs there a lot, and one or some of such occurrences get into the command lines, and here we need g++6 in this case.

On the other hand, ${CXX} isn't supposed to have spaces in it on UNIX. A lot of other things will break too in such case.

[adamw]

multimedia/webcamoid/Makefile

35 ↗

(On Diff #36657)

Fair enough!