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Date: Tue, 6 Mar 2018 14:27:01 +0100
From: Gerd Hoffmann <kraxel@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH 0/7] audio: modularize
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To: =?utf-8?Q?Marc-Andr=C3=A9?= Lureau <marcandre.lureau@gmail.com>
Cc: QEMU <qemu-devel@nongnu.org>

> >> /home/elmarco/src/qemu/build/x86_64-softmmu/../audio-pa.so: undefined
> >> symbol: audio_pt_unlock_and_signal

> Fresh directory, cleaned ccache. That didn't help. fwiw, I am
> compiling on f27, gcc (GCC) 7.3.1 20180130. I'll investigate further
> if you can't reproduce.

Hmm, working fine here (both rhel-7 and fedora-27 testbuild container, default
build flags).

The symbol in question should be provided by qemu:

kraxel@fedora-64bit ~/projects/qemu/build/fedora# objdump -x audio-pa.so | grep audio_pt_unlock_and_signal
0000000000000000         *UND*  0000000000000000              audio_pt_unlock_and_signal
kraxel@fedora-64bit ~/projects/qemu/build/fedora# objdump -x x86_64-softmmu/qemu-system-x86_64 | grep audio_pt_unlock_and_signal
00000000004735f0 g     F .text  0000000000000067              audio_pt_unlock_and_signal

Possibly your linker throws it away, thinking there is no user because of the
modular drivers?

cheers,
  Gerd