[Audacity-devel] Linux build instructions in a mess

Post by James Crook
I think we need to sort out our linux build instructions!
https://github.com/audacity/audacity/blob/7156479d11d24f2426
298cb59c19615b54feac9f/INSTALL
I think we should be mentioning our repo for patched wxWidgets as
(surely?) it won't work as is.
http://wiki.audacityteam.org/wiki/User:James/Building_on_Ubuntu
I think we should also modify our set up so that configure chooses "local
system" by default, and -std=gnu++11 by default.
I work on Windows, and occasionally build on Ubuntu, but not other
linuxes, so I would like it that someone who knows autotools and knows what
they are doing does the updates.
--James.

I mentioned lately too that the Mac build instructions should probably be
updated. Don't mention the .patch files, and remove them from our source
code tree. Let our fork of wxWidgets be the source.

Agreed?

PRL

Post by James Crook
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Cliff Scott

2017-07-24 01:27:39 UTC

Post by James Crook
I think we need to sort out our linux build instructions!
https://github.com/audacity/audacity/blob/7156479d11d24f2426298cb59c19615b54feac9f/INSTALL <https://github.com/audacity/audacity/blob/7156479d11d24f2426298cb59c19615b54feac9f/INSTALL>
I think we should be mentioning our repo for patched wxWidgets as (surely?) it won't work as is.
http://wiki.audacityteam.org/wiki/User:James/Building_on_Ubuntu <http://wiki.audacityteam.org/wiki/User:James/Building_on_Ubuntu>
I think we should also modify our set up so that configure chooses "local system" by default, and -std=gnu++11 by default.
I work on Windows, and occasionally build on Ubuntu, but not other linuxes, so I would like it that someone who knows autotools and knows what they are doing does the updates.
--James.
I mentioned lately too that the Mac build instructions should probably be updated. Don't mention the .patch files, and remove them from our source code tree. Let our fork of wxWidgets be the source.
Agreed?

Seems as if that would simplify things so +1

Cliff

Post by James Crook
PRL
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Steve the Fiddle

2017-07-24 03:06:46 UTC

Audacity builds fine on Ubuntu with the standard wxgtk3 package.

Post by James Crook
http://wiki.audacityteam.org/wiki/User:James/Building_on_Ubuntu

but there's no mention of dependencies that are not part of the
standard Desktop Ubuntu.

More up to date detailed instructions are available on the forum:
https://forum.audacityteam.org/viewforum.php?f=19

The most recent "almost complete" instructions are here:
https://forum.audacityteam.org/viewtopic.php?f=19&t=96525
I've not yet got FFmpeg working, which I suspect may require building
against system ffmpeg libraries (see also below).

Post by James Crook
I think we should also modify our set up so that configure chooses "local
system" by default,

I don't know what (if any) implications that has for package
maintainers, but Audacity does not build with the system portaudio
library on Ubuntu 16.04 LTS, so my most recent instructions use:

../configure --disable-dynamic-loading --with-lib-preference="local system"

--disable-dynamic-loading allowed ffmpeg to work on Ubuntu 16.04 (last
tested a few days ago), but that's not working for me today with
Ubuntu 17.04. Audacity is building, but I'm still getting the
"Libraries" preference even with --disable-dynamic-loading

Steve

Post by James Crook
and -std=gnu++11 by default.
I work on Windows, and occasionally build on Ubuntu, but not other
linuxes, so I would like it that someone who knows autotools and knows what
they are doing does the updates.
--James.

Post by James Crook
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Steve the Fiddle

2017-07-24 12:53:07 UTC

Audacity builds fine on Ubuntu with the standard wxgtk3 package.

Post by James Crook
http://wiki.audacityteam.org/wiki/User:James/Building_on_Ubuntu

but there's no mention of dependencies that are not part of the
standard Desktop Ubuntu.
https://forum.audacityteam.org/viewforum.php?f=19
https://forum.audacityteam.org/viewtopic.php?f=19&t=96525
I've not yet got FFmpeg working, which I suspect may require building
against system ffmpeg libraries (see also below).

Post by James Crook
I think we should also modify our set up so that configure chooses "local
system" by default,

Why?
We currently need to build against our local portaudio library, at
least on Ubuntu 16.04, but I've not noticed problems with system
libraries elsewhere.

Isn't there a risk that if we build against local libraries that there
could be compatibility problems with installed system libraries? That
certainly appears to be the case for ffmpeg (see below).

Post by Steve the Fiddle
I don't know what (if any) implications that has for package
maintainers, but Audacity does not build with the system portaudio
../configure --disable-dynamic-loading --with-lib-preference="local system"
--disable-dynamic-loading allowed ffmpeg to work on Ubuntu 16.04 (last
tested a few days ago), but that's not working for me today with
Ubuntu 17.04. Audacity is building, but I'm still getting the
"Libraries" preference even with --disable-dynamic-loading

I've now got ffmpeg working on Ubuntu 17.04.
The "--disable-dynamic-loading" switch is not required, but Audacity
must be built against system ffmpeg libraries.

I think that installing dependencies for Audacity on Ubuntu 17.04 can
be simplified from my current instructions now that I've got my
sources.list fixed. It'll take a bit of time to check because I will
need to reinstall vanilla Ubuntu.

Steve

Post by Steve the Fiddle
Steve

James Crook

2017-07-24 14:33:23 UTC

Post by James Crook
I think we should also modify our set up so that configure chooses
"local system" by default,

Why?
We currently need to build against our local portaudio library, at
least on Ubuntu 16.04, but I've not noticed problems with system
libraries elsewhere.
Isn't there a risk that if we build against local libraries that there
could be compatibility problems with installed system libraries? That
certainly appears to be the case for ffmpeg (see below).

I can't build ffmpeg with system libs. I can't build with system
portaudio. I'm expecting that disabling dynamic linking (of wxwidgets)
prevents use of mod-xxx plug-ins like mod-nyqbench. I've lost track of
exactly what libs we've patched, but I think it is more than portaudio.

Also we know we only work with some versions of ffmpeg, and that
probably holds for other libs too.

So I guessed that the most reliable way to build multiplatform is to use
our own copy of the libs.

A better solution would be if configure would make 'the right choices',
but I think that needs more autotools foo than we (certainly than I)
have. So that's why. I'm certainly open to any better solution. I do
know that our instructions for building on linux need some work, and
that was my main point.

--James.

Steve the Fiddle

2017-07-24 14:55:48 UTC

Post by James Crook
I think we should also modify our set up so that configure chooses "local
system" by default,

Why?
We currently need to build against our local portaudio library, at
least on Ubuntu 16.04, but I've not noticed problems with system
libraries elsewhere.
Isn't there a risk that if we build against local libraries that there
could be compatibility problems with installed system libraries? That
certainly appears to be the case for ffmpeg (see below).

I can't build ffmpeg with system libs. I can't build with system portaudio.

Which version of Ubuntu are you using?
With Xubuntu 16.04, these instructions work for me with one modification:
https://forum.audacityteam.org/viewtopic.php?f=19&t=88922

The modification: add "--with-portaudio=local" to the configure command:
../configure --disable-dynamic-loading --with-portaudio=local

I'm expecting that disabling dynamic linking (of wxwidgets) prevents use of
mod-xxx plug-ins like mod-nyqbench.

No. Nyquist Workbench still works.

I've lost track of exactly what libs
we've patched, but I think it is more than portaudio.
Also we know we only work with some versions of ffmpeg, and that probably
holds for other libs too.
So I guessed that the most reliable way to build multiplatform is to use our
own copy of the libs.
A better solution would be if configure would make 'the right choices', but
I think that needs more autotools foo than we (certainly than I) have.

Could Benjamin be persuaded to give a hand? He's still listed on both
the Debian and Ubuntu package maintainers lists.
What about Richard Ash?

Steve

So
that's why. I'm certainly open to any better solution. I do know that our
instructions for building on linux need some work, and that was my main
point.
--James.

James Crook

2017-07-24 15:06:59 UTC

Post by James Crook
I think we should also modify our set up so that configure chooses "local
system" by default,

Why?
We currently need to build against our local portaudio library, at
least on Ubuntu 16.04, but I've not noticed problems with system
libraries elsewhere.
Isn't there a risk that if we build against local libraries that there
could be compatibility problems with installed system libraries? That
certainly appears to be the case for ffmpeg (see below).

I can't build ffmpeg with system libs. I can't build with system portaudio.

Which version of Ubuntu are you using?

14.04, with an updated gcc.

--James.

Steve the Fiddle

2017-07-24 15:43:18 UTC

Post by James Crook
I think we should also modify our set up so that configure chooses "local
system" by default,

Why?
We currently need to build against our local portaudio library, at
least on Ubuntu 16.04, but I've not noticed problems with system
libraries elsewhere.
Isn't there a risk that if we build against local libraries that there
could be compatibility problems with installed system libraries? That
certainly appears to be the case for ffmpeg (see below).

I can't build ffmpeg with system libs. I can't build with system portaudio.

Which version of Ubuntu are you using?

14.04, with an updated gcc.

That's a bit long in the tooth (even though still a supported version).
If I recall correctly, 14.04 did not have FFmpeg in the official repositories.

Steve

Post by James Crook
--James.
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James Crook

2017-07-24 16:08:54 UTC

Post by James Crook
I think we should also modify our set up so that configure chooses "local
system" by default,

Why?
We currently need to build against our local portaudio library, at
least on Ubuntu 16.04, but I've not noticed problems with system
libraries elsewhere.
Isn't there a risk that if we build against local libraries that there
could be compatibility problems with installed system libraries? That
certainly appears to be the case for ffmpeg (see below).

I can't build ffmpeg with system libs. I can't build with system portaudio.

Which version of Ubuntu are you using?

14.04, with an updated gcc.

That's a bit long in the tooth (even though still a supported version).

Then you and I are very long indeed in the tooth. It was only released
in 2014.
It's LTS and supported out into 2019. We could agree to drop support
for it, I suppose, if supporting it is and will be causing a lot of
problems. But that begs the question, which versions of Linux do we
support?

Post by Steve the Fiddle
If I recall correctly, 14.04 did not have FFmpeg in the official repositories.
Steve

Steve the Fiddle

2017-07-24 16:28:42 UTC

Post by James Crook
I think we should also modify our set up so that configure chooses "local
system" by default,

Why?
We currently need to build against our local portaudio library, at
least on Ubuntu 16.04, but I've not noticed problems with system
libraries elsewhere.
Isn't there a risk that if we build against local libraries that there
could be compatibility problems with installed system libraries? That
certainly appears to be the case for ffmpeg (see below).

I can't build ffmpeg with system libs. I can't build with system portaudio.

Which version of Ubuntu are you using?

14.04, with an updated gcc.

That's a bit long in the tooth (even though still a supported version).

Then you and I are very long indeed in the tooth. It was only released in
2014.
It's LTS and supported out into 2019. We could agree to drop support for
it, I suppose, if supporting it is and will be causing a lot of problems.
But that begs the question, which versions of Linux do we support?

No, I agree that we should officially support Ubuntu 14.04 LTS, though
perhaps prioritise more recent LTS versions. I think that it's
reasonable to assume that users that are particularly concerned about
having the most up to date software will have updated to a more recent
Ubuntu release.

I've had ffmpeg working on 14.04 with Audacity 2.1.2, so I'd guess
that it should also be possible with 2.2.0, though it may require a
bit of massaging. I don't have time to do that right now.

Steve

Post by Steve the Fiddle
If I recall correctly, 14.04 did not have FFmpeg in the official repositories.
Steve

Darrell Walisser

2017-07-24 18:08:41 UTC

This post might be inappropriate. Click to display it.

James Crook

2017-07-24 19:41:19 UTC

Post by James Crook
and -std=gnu++11 by default.

-std=gnu++11 is no longer needed, it's in the current configure script.

Thanks! I updated INSTALL so it no longer says to pass in CXXFLAGS and
also updated on wiki.

It would be good to include instructions for getting a compatible
FFmpeg/libav version from source as well. I've always used the current git
version installed in /usr/local. If someone can point me in the right
direction (what exactly are the compatible versions?) I can hack some
autoconf foo for it.

Anyone?

--James.

Steve the Fiddle

2017-07-24 20:03:29 UTC

Post by James Crook
and -std=gnu++11 by default.

-std=gnu++11 is no longer needed, it's in the current configure script.

Thanks! I updated INSTALL so it no longer says to pass in CXXFLAGS and also
updated on wiki.

Anyone?

It depends on the distribution / version.

I have just tested with a fully updated vanilla install of Ubuntu
17.04 LTS, and written up detailed notes here:
https://forum.audacityteam.org/viewtopic.php?f=19&t=96525

Building and installing was very straightforward, using system
libraries where available _except_for_portaudio_ and everything,
including FFmpeg works straight out of the box.

On Ubuntu 16.04 LTS, the standard Ubuntu repository version works
_provided_that_ Audacity is build with system libraries and Audacity
is configured with the
"--disable-dynamic-loading" option.

Steve

--James.
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Darrell Walisser

2017-07-25 00:43:27 UTC

Post by James Crook
and -std=gnu++11 by default.

-std=gnu++11 is no longer needed, it's in the current configure script.

Thanks! I updated INSTALL so it no longer says to pass in CXXFLAGS and

also

Post by James Crook
updated on wiki.

It would be good to include instructions for getting a compatible
FFmpeg/libav version from source as well. I've always used the current

git