[Vm-dev] Unexpected external library dependencies on linux

[Tobias Pape]

> On 17.04.2020, at 01:28, David T. Lewis <lewis at mail.msen.com> wrote:
> 
> 
> On Thu, Apr 16, 2020 at 02:55:46PM -0700, tim Rowledge wrote:
>> 
>>> On 2020-04-16, at 2:42 PM, David T. Lewis <lewis at mail.msen.com> wrote:
>>> 
>>> 
>>> On Thu, Apr 16, 2020 at 06:53:51PM +0200, Levente Uzonyi wrote:
>>>> 
>>>> However, recent VMs (202003050026 from March, 202004160240 from April) 
>>>> also depend on the following:
>>>> 
>>>> libuuid.so.1
>>>> libutil.so.1
>>>> libpulse-simple.so.0
>>>> libasound.so.2
>>>> 
>>>> The last two are the most worrying as servers usually don't need or have 
>>>> sound installed. So, without pulseaudio installed, these VMs won't start.
>>>> Does anyone know how and why those new dependencies got there?
>>>> 
>>>> (These are the dependencies of the VM binary itself not dependencies of 
>>>> external plugins).
>>> 
>>> Hi Levente,
>>> 
>>> I don't know the answer to your question, but the sound dependencies are
>>> likely associated with the VM plugin modules vm-sound-*.so as opposed to
>>> any of the conventional VM plugins such as UUIDPlugin.so. It is quite
>>> likely that specifying the -vm-sound-null parameter to the VM will bypass
>>> any problems. Otherwise, deleting the offending vm-sound-* modules should
>>> be harmless.
>> 
>> Is it possible some edit to the build files made the pulse audio stuff
>> a default (this was discussed recently) and set it to link to the VM
>> instead of the (expected to be) separate vm-sound-* module? 
>> 
> 
> Pulse audio /is/ one of the vm-sound-* modules, so the idea there was
> just to put it first in the search list because that's what makes sense on
> most Linux platforms today.
> 
> But I see now that Levente was asking about library dependencies in the
> actual VM executable itself (which you can see with "$ ldd squeak" in the
> libarary directory with the VM and plugins). It has dependencies on the
> pulse audio and alsa sound libraries. That makes no sense at all, and I
> don't know the reason for it.
> 
> I also see that the plugins have lots of unnecessary dependencies. For
> example, the UUID plugin depends on pulse audio and alsa sound libraries,
> which is obviously not right.


There might be a problem with the way the linker flags are being collected.
Namely, that they're built up while configuring the individual plugins but 
then used throughout the entire process. That bit me for some other flags
on FreeBSD.

Unser Bausystem ist Mist ;)

Best regards
	-Tobias