Build with qtcore-5.7

[Tamahome-M]

emerge -av sky

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These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild UD ] dev-qt/qtcore-5.6.2-r1:5/5.6::gentoo [5.7.1-r2:5/5.7::gentoo] USE="systemd -debug -icu {-test}" 0 KiB
[ebuild UD ] dev-qt/qtdbus-5.6.2:5/5.6::gentoo [5.7.1:5/5.7::gentoo] USE="-debug {-test}" 0 KiB
[ebuild UD ] dev-qt/qtgui-5.6.2:5/5.6::gentoo [5.7.1:5/5.7::gentoo] USE="dbus egl gif gtkstyle%* jpeg png udev xcb -accessibility -debug -eglfs -evdev -gles2 -ibus -libinput {-test} -tslib -tuio (-gtk%)" 0 KiB
[ebuild UD ] dev-qt/qtwidgets-5.6.2:5/5.6::gentoo [5.7.1:5/5.7::gentoo] USE="gtkstyle% png xcb -debug -gles2 {-test}" 0 KiB
[ebuild UD ] media-video/ffmpeg-2.8.11:0/54.56.56::gentoo [3.2.4:0/55.57.57::gentoo] USE="X aac%* aacplus%* alsa amr amrenc bzip2 encode faac%* gpl gsm hardcoded-tables iconv jpeg2k librtmp lzma modplug mp3 network opengl openssl opus postproc pulseaudio samba sdl speex ssh theora threads truetype twolame v4l vaapi vdpau vorbis vpx webp x264 xcb xvid zlib (-altivec) (-armv5te) (-armv6) (-armv6t2) (-armvfp) -bluray -bs2b -cdio -celt -cpudetection -debug -doc -examples% -fdk -flite -fontconfig -frei0r -fribidi -gme -gnutls -iec61883 -ieee1394 -jack -ladspa -libass -libcaca -libressl% -libsoxr -libv4l (-mipsdspr1) (-mipsdspr2) (-mipsfpu) (-neon) -openal -oss -pic -quvi% -schroedinger -snappy -static-libs {-test} -wavpack -x265 -zvbi (-chromaprint%) (-ebur128%) (-gcrypt%) (-gmp%) (-kvazaar%) (-libilbc%) (-mmal%) (-nvenc%) (-openh264%) (-rubberband%) (-zimg%)" ABI_X86="32 (64) (-x32)" CPU_FLAGS_X86="avx avx2 fma3 mmx mmxext sse sse2 sse3 sse4_1 sse4_2 ssse3 -3dnow -3dnowext -fma4 -xop (-aes%*)" FFTOOLS="aviocat cws2fws ffescape ffeval ffhash fourcc2pixfmt graph2dot ismindex pktdumper qt-faststart sidxindex trasher" 8 382 KiB
[ebuild UD ] dev-qt/qtnetwork-5.6.2:5/5.6::gentoo [5.7.1:5/5.7::gentoo] USE="networkmanager ssl -bindist -connman -debug -libproxy {-test}" 0 KiB
[ebuild N ] net-im/sky-2.1.6633.1-r1::telred 4 413 KiB

Total: 7 packages (6 downgrades, 1 new), Size of downloads: 12 795 KiB

!!! Multiple package instances within a single package slot have been pulled
!!! into the dependency graph, resulting in a slot conflict:

dev-qt/qtdbus:5

(dev-qt/qtdbus-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
dev-qt/qtdbus:5/5.6 required by (net-im/sky-2.1.6633.1-r1:0/0::telred, ebuild scheduled for merge)
^^^^^^
~dev-qt/qtdbus-5.6.2 required by (dev-qt/qtgui-5.6.2:5/5.6::gentoo, ebuild scheduled for merge)
^ ^^^^^
(and 1 more with the same problems)

(dev-qt/qtdbus-5.7.1:5/5.7::gentoo, installed) pulled in by
~dev-qt/qtdbus-5.7.1 required by (dev-qt/qtgui-5.7.1:5/5.7::gentoo, installed)
^ ^^^^^
(and 1 more with the same problem)

dev-qt/qtgui:5

(dev-qt/qtgui-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
dev-qt/qtgui:5/5.6[dbus,png,xcb] required by (net-im/sky-2.1.6633.1-r1:0/0::telred, ebuild scheduled for merge)
^^^^^^
~dev-qt/qtgui-5.6.2[gles2=,gtkstyle=,png=,xcb?] required by (dev-qt/qtwidgets-5.6.2:5/5.6::gentoo, ebuild scheduled for merge)
^ ^^^^^

(dev-qt/qtgui-5.7.1:5/5.7::gentoo, installed) pulled in by
~dev-qt/qtgui-5.7.1[gles2=] required by (dev-qt/qtprintsupport-5.7.1:5/5.7::gentoo, installed)
^ ^^^^^
(and 2 more with the same problem)

dev-qt/qtcore:5

(dev-qt/qtcore-5.6.2-r1:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
dev-qt/qtcore:5/5.6 required by (net-im/sky-2.1.6633.1-r1:0/0::telred, ebuild scheduled for merge)
^^^^^^
~dev-qt/qtcore-5.6.2 required by (dev-qt/qtnetwork-5.6.2:5/5.6::gentoo, ebuild scheduled for merge)
^ ^^^^^
(and 3 more with the same problems)

(dev-qt/qtcore-5.7.1-r2:5/5.7::gentoo, installed) pulled in by
~dev-qt/qtcore-5.7.1 required by (dev-qt/qtwidgets-5.7.1:5/5.7::gentoo, installed)
^ ^^^^^
(and 7 more with the same problem)

dev-qt/qtnetwork:5

(dev-qt/qtnetwork-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
dev-qt/qtnetwork:5/5.6 required by (net-im/sky-2.1.6633.1-r1:0/0::telred, ebuild scheduled for merge)
^^^^^^

(dev-qt/qtnetwork-5.7.1:5/5.7::gentoo, installed) pulled in by
~dev-qt/qtnetwork-5.7.1 required by (dev-qt/qtmultimedia-5.7.1:5/5.7::gentoo, installed)
^ ^^^^^

dev-qt/qtwidgets:5

(dev-qt/qtwidgets-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
dev-qt/qtwidgets:5/5.6[png,xcb] required by (net-im/sky-2.1.6633.1-r1:0/0::telred, ebuild scheduled for merge)
^^^^^^

(dev-qt/qtwidgets-5.7.1:5/5.7::gentoo, installed) pulled in by
~dev-qt/qtwidgets-5.7.1[gles2=] required by (dev-qt/qtprintsupport-5.7.1:5/5.7::gentoo, installed)
^ ^^^^^

media-video/ffmpeg:0

(media-video/ffmpeg-2.8.11:0/54.56.56::gentoo, ebuild scheduled for merge) pulled in by
media-video/ffmpeg:0/54.56.56[X] required by (net-im/sky-2.1.6633.1-r1:0/0::telred, ebuild scheduled for merge)
^^^^^^^^^^^

(media-video/ffmpeg-3.2.4:0/55.57.57::gentoo, installed) pulled in by
>=media-video/ffmpeg-3.2.4:0/55.57.57=[abi_x86_64(-)] required by (media-plugins/gst-plugins-libav-1.10.4:1.0/1.0::gentoo, installed)
^^ ^^^^^^^^^^^^^^^^^
media-video/ffmpeg:0/55.57.57= required by (net-misc/freerdp-2.0.0_pre20161219:0/2::gentoo, installed)
^^^^^^^^^^^^
(and 3 more with the same problems)

NOTE: Use the '--verbose-conflicts' option to display parents omitted above

It may be possible to solve this problem by using package.mask to
prevent one of those packages from being selected. However, it is also
possible that conflicting dependencies exist such that they are
impossible to satisfy simultaneously. If such a conflict exists in
the dependencies of two different packages, then those packages can
not be installed simultaneously. You may want to try a larger value of
the --backtrack option, such as --backtrack=30, in order to see if
that will solve this conflict automatically.

[joakim-tjernlund]

qt-5.7 is stable now, please update ebuild.
Also, could you drop the include openh264 lib as Gentoo already has that lib