multimedia/vlc: fix build with CHROMECAST ON and devel/protobuf 24 and fix plist error if QT5 on and xext,xinerama,xpm installed

[vvd]

Summary

1. CHROMECAST option require devel/protobuf.

After this commit https://cgit.freebsd.org/ports/commit/?id=69e2e87fa56b54e267429b326f7f6188a7baaa71 consumers require USE_CXXSTD=c++17.

2. There is default on configure option "skins2". It require QT5 and xext,xinerama,xpm - if they installed then it build bin/svlc and it is in stage after build.

Added option SKINS default off to handle bin/svlc.

Tested in poudriere and in live system.

[diizzy]

multimedia/vlc/Makefile

34

In that case it should go under CHROMECAST for now?

[vvd]

multimedia/vlc/Makefile

34

Is any better way than:

.include <bsd.port.options.mk>

.if ${PORT_OPTIONS:MCHROMECAST}
USE_CXXSTD=	c++17
.endif

?
Didn't find examples in other ports.

[vvd]

multimedia/vlc/Makefile

34

This way tested and vlc build fine with it.
Update patch?

[arrowd]

This change looks very useful, thanks for figuring this out!

multimedia/vlc/Makefile

34

CHROMECAST_USE= cxxstd=c++17

See https://docs.freebsd.org/en/books/porters-handbook/makefiles/#options-use

[arrowd]