Bugzilla Bug 169219

As per summary.

The currently-masked alsa-lib version has a midi useflag that I introduced to
reduce the size of the library itself. When this useflag is disabled (the
default is enabled), the snd_seq_* functions won't be in the library. The
snd_seq_* functions are needed by dosbox to be able to compile:

/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:48:
undefined reference to `snd_seq_event_output'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:50:
undefined reference to `snd_seq_drain_output'
gui/libgui.a(midi.o): In function `MidiHandler_alsa::Close()':
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:122:
undefined reference to `snd_seq_close'
gui/libgui.a(midi.o): In function `MidiHandler_alsa::Open(char const*)':
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:143:
undefined reference to `snd_seq_open'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:148:
undefined reference to `snd_seq_client_id'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:149:
undefined reference to `snd_seq_set_client_name'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:157:
undefined reference to `snd_seq_create_simple_port'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:166:
undefined reference to `snd_seq_connect_to'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:159:
undefined reference to `snd_seq_close'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:167:
undefined reference to `snd_seq_close'
gui/libgui.a(midi.o): In function `MidiHandler_alsa::send_event(int)':
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:48:
undefined reference to `snd_seq_event_output'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:48:
undefined reference to `snd_seq_event_output'
/var/tmp/portage/games-emulation/dosbox-0.70/work/dosbox-0.70/src/gui/midi_alsa.h:50:
undefined reference to `snd_seq_drain_output'

I'm attaching an ebuild patch for 0.70 that adds the (almost standard now)
check for the midi useflag on alsa-lib.

Thanks,
Diego

Created an attachment (id=112005) [edit]
alsa-lib midi check patch

in portage.  thanks for the bug report and patch.