If app-accessibility/brltty is compiled without use flag api, than the compilation of app-emulation/qemu-2.8.0-r7 with use flag accessibility will fail with: ../configure --prefix=/usr --sysconfdir=/etc --libdir=/usr/lib64 --docdir=/usr/share/doc/qemu-2.8.0-r7/html --disable-bsd-user --disable-guest-agent --disable-strip --disable-werror --disable-gcrypt --python=/usr/bin/python2.7 --cc=x86_64-pc-linux-gnu-gcc --cxx=x86_64-pc-linux-gnu-g++ --host-cc=x86_64-pc-linux-gnu-gcc --disable-debug-info --disable-debug-tcg --enable-docs --disable-tcg-interpreter --enable-attr --enable-brlapi --enable-linux-aio --enable-bzip2 --enable-bluez --enable-cap-ng --enable-curl --disable-fdt --disable-glusterfs --enable-gnutls --enable-nettle --enable-gtk --disable-rdma --disable-libiscsi --enable-vnc-jpeg --enable-kvm --enable-lzo --enable-curses --disable-libnfs --disable-numa --enable-opengl --enable-vnc-png --disable-rbd --enable-vnc-sasl --enable-sdl --enable-seccomp --enable-smartcard --enable-snappy --disable-spice --disable-libssh2 --enable-libusb --disable-usb-redir --disable-vde --enable-vhost-net --disable-virglrenderer --disable-virtfs --enable-vnc --disable-vte --disable-xen --disable-xen-pci-passthrough --disable-xfsctl --audio-drv-list=pa,sdl,alsa,oss --with-gtkabi=3.0 --with-sdlabi=1.2 --disable-linux-user --disable-system --disable-blobs --enable-tools --target-list= ERROR: User requested feature brlapi configure was not able to find it. Install brlapi devel
commit b813d239417d7ede1b2a4b596ed01aab7d7d96fc Author: Matthias Maier <tamiko@gentoo.org> Date: Sun Mar 26 22:22:23 2017 -0500 app-emulation/qemu: require app-accessibility/brltty[api], bug #613138 Package-Manager: Portage-2.3.3, Repoman-2.3.2
