[mythtv-users] Question about testing a patch

Klavs Klavsen kl at vsen.dk
Wed Dec 16 12:09:55 UTC 2009

Hi Harry,

IMHO the best way it to build a package.

I did that for my armel hardware (backend - qnap ts119) and it was 
pretty easy.

put it all in /usr/src and do this:
cd /usr/src

If you're on an *buntu 9.10 - you can just:
apt-get source mythtv #fetches and unpacks sources in current folder
apt-get build-dep mythtv #installs dependencies needed to compile the 

find the sources on packages.ubuntu.org f.ex. (3 files: a .dsc, a source 
and a diff)
and look in the unpacked folder (see below) in debian/control - to see 
what packages it needs - and install your distro's equivalents, and edit 
the control file to fit (just remove the listed dependency from the 
control file).

#this will unpack the .dsc for you - and do some checks - you can 
manually untar and apply the diff if you want.
dpkg-source -x mythtv_version-revision.dsc

The diff contains the debian subfolder - which is where the scripts used 
to build the package is located.

Go into the folder it just created - and edit debian/rules - remove 
whatever patches it applies (if they bug you - or if they don't match 
any longer).

copy the debian folder into your myth-svn folder - and edit the 
changelog file in the debian folder - so the first entry has the version 
nr. you want your package to have.

Now build your package:
cd svn-checkout-of-mythtv-incl.-what-you-modified-and-debian-folder

dpkg-buildpackage -rfakeroot -b

Harry Devine said the following on 2009-12-11 21:18:
> OK, so I have the latest Mythbuntu 0.22-fixes auto-build installed 
> (22954 I think; I'm not @ home to verify), and I downloaded the latest 
> trunk (22970) to look around the code.  I have an idea for an 
> improvement (at least 1 I'd like to see).  I was looking at the code 
> and I have an idea on what I need to do, but I've never compiled Myth 
> from source before.  So, I have a few questions:
> 1) When I upgraded to Mythbuntu 9.10 and 0.22, should the required 
> development tools already be installed for me?
> 2) My system is the 64 bit version.  Does the Wiki have the steps 
> documented on how to compile from source?  The ./configure step, 
> etc.?  Should I see what my existing mythbackend and mythfrontend were 
> compiled with using --version so I can setup the configure script 
> properly?
> 3) Since I don't want to reinstall everything, can I check out the 
> same version from SVN that's on my system?  Then, can I stop 
> mythbackend, rename the executable, and put the new one in its place?  
> The code is in the backend only from what I can tell.  Is this 
> sufficient?
> 4) After I (hopefully) test the change, I assume I can submit the 
> updated code to the developers in Trac somehow, right?
> Thanks for any help.  Please go easy on me, its my 1st attempt at 
> trying to implement a patch.
> Harry
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> mythtv-users at mythtv.org
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Klavs Klavsen, GSEC - kl at vsen.dk - http://www.vsen.dk

"Those who do not understand Unix are condemned to reinvent it, poorly."
  --Henry Spencer

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