waltd...@waltdnes.org wrote:

> On Thu, Dec 24, 2015 at 10:48:28PM +0000, Ian Bloss wrote
> > Libsdl and libsdl2 built with sound use flag on host?
> 
>   I didn't bother enabling alsa except for packages that actually need
> it.  I've enabled it for libsdl, but not for sdl2, because I didn't
> realize libsdl2 even existed.  According to equery, the only package
> pulling in libsdl2 is qemu, and that's because I set the flag.  If I
> remove the "alsa2" flag from qemu, will it work properly with "alsa"
> alone?

On my host system I use alsa and no pulseaudio. However it doesn't 
make any difference if I set the alsa USE-flag for qemu or not.

I don't know if qemu runs flawless without sdl2 USE-flag. But you can
easily test this.

Btw. Since I reverted from qemu-2.5.0 back to qemu-2.4.1-r2, qemu 
hangs no longer when I specify ac97, hda or es1370 as sound hardware
emulation. But I have to start the xfce mixer application on the 
guest OS after the desktop is loaded. If I don't do this, then one 
core on my host is always at 100% load and qemu is slow and sometimes
doesn't respond for some seconds. But no error message appears on 
guest or host.
Strange is, that the guest OS doesn't show a high load but only the 
host OS. After I started the xfce-mixer app on guest OS, everything 
is smooth and host load count normalizes. 

I now use qemu with "-soundhw es1370" and am have automated the start 
of the mixer app. With this, sound is working fine.

As I already said, when I use sb16 or gus then I have no sound at all.
Only ac97, hda and es1370 are working for me. Maybe this has something
to do with the guest OS.

Here are the USE-flags that I use for qemu, libsdl and libsdl2.

app-emulation/qemu-2.4.1-r2 aio caps curl fdt filecaps gtk gtk2 jpeg lzo 
ncurses nfs nls opengl pin-upstream-blobs png python sasl sdl sdl2 seccomp 
spice threads usb uuid vde vhost-net vnc xattr xfs -accessibility -alsa 
-bluetooth -debug -glusterfs -infiniband -iscsi -numa -pulseaudio -rbd -selinux 
-smartcard -snappy -ssh -static -static-softmmu -static-user -systemtap -tci 
-test -tls -usbredir -virtfs -vte -xen

media-libs/libsdl-1.2.15-r9 X alsa dga fbcon joystick opengl oss sound video xv 
-aalib -custom-cflags -libcaca -nas -pulseaudio -static-libs -tslib -xinerama

media-libs/libsdl2-2.0.3-r200 X alsa dbus joystick opengl oss sound threads 
udev video xscreensaver -altivec -custom-cflags -fusionsound -gles -haptic -nas 
-pulseaudio -static-libs -tslib -wayland -xinerama

--
Regards
wabe

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