MythTV on Mac OSX build
So you've decided that you want to compile Myth on your Mac under OS X. Normally, the easiest way to do that is to download the packager script, osx-packager-qtsdk.pl. Running the packager script then downloads several pre-requisites and the MythTV source, and builds the prerequisites and MythTV application bundles. However, you must also have the XCode development environment installed on your Mac before you begin.
In order to run the build you will need the following:
- Xcode for your OS X release
- MythTV packager
- Firewire SDK (optional)
- internet connection
Xcode and Firewire SDK
XCode is essential since it installs the compiler, linker and other support utilities.
Xcode and the Firewire SDK are both available from the apple developer site. You will need to register as an apple developer. Select the 'Safari' option as its free :D
The Firewire SDK is needed if you a) intend to build the backend, and b) want the backend to be able to record from a firewire device.
XCode comes with git for source code management. You will use this program to get source code for building.
Several critical pieces of Myth code are written in X86 assembler, using yasm, to obtain maximum performance. XCode, however, does not include yasm. Myth also provides alternate code so that yasm is not strictly necessary. However, things like the on screen display may be sluggish without it.
Yasm can be downloaded from http://www.tortall.net/projects/yasm/wiki/Download Unpack it, configure it with the defaults and install it.
The easiest way to build MythTV from source is to download the packager script. The packager scripts downloads the source and builds the release.
You likely need to obtain the correct packager for your release, though MythTV tries to maintain a degree of backward compatibility.
Using git to obtain the automatic build script
Stable release (recommended)
git clone -b OSX-fixes git://github.com/MythTV/packaging.git
git clone git://github.com/MythTV/packaging.git
Make a copy of osx-packager-qtsdk.pl in the directory you want to be the top-level for your build. Make the script executable, as follows:
chmod +x osx-packager-qtsdk.pl
If you run the script with either the -help or -man options, it will give a summary of the usage options.
Once you have obtained all of the pre-requisites you are ready to build. There are several command line options to the osx-packager-qtsdk.pl script that control exactly what all will be built.
Selecting a version to build
The MythTV developers use github, (formerly subversion) to manage the source code. There are three main subdivisions to consider:
- master (formerly trunk)
Use the git-rev option to select the version to build. For example
Use the script's
-plugins option to specify the plugins you want to include. Use
-pluginskip to supress building any plugins.
Currently, the following plugins won't work on Mac OS X:
- MythGame - no compatible games
- MythNetVision - not currently ported to Myth for Mac OS.
MythGallery requires exif and/or new-exif if you want to be able to see information related to camera settings that may be embedded in your pictures. The opengl option must be enabled if you want to have transition effects shown between pictures in a slide show. The script should have downloaded and built this code but you have to enable it, eg:
MythWeather requires Myth's Perl bindings. The Perl bindings, in turn, rely on certain perl modules that are not present by default. All the required perl modules can be obtained from the Comprehensive Perl Archive Network (CPAN). Read up on
cpan to learn how to install these modules. (Hint: run
cpan as the super user, i.e.
sudo cpan Module::Name.)
Putting it all together
The other relevant options are -verbose and -enable-backend. The -verbose option will report a great deal of detail about the build which can be very helpful if there is a failure. If you want the backend as well, use the -enable-backend flag. Use -enable-jobtools to build an application that will process jobs (eg commercial flagging) from the backend's job queue.
osx-packager-qtsdk.pl -gitrev fixes/0.26 -enable-backend -enable-jobtools -plugins mythbrowser,mythgallery,mythmusic,mythnews,mythvideo,mythweather,opengl,exif,new-exif-m32 -verbose
Assuming all goes well, you should end up with at least three applications ready to test.
Approximate Build Times
- Mac Mini: 3 hours
- Mac Pro: 45 minutes
(This does not include download times)
Contribute the build to the community
Now you have a build and as I'm sure your mum always said 'you need to share' ;).
You can help the community by contributing your build to the sourceforge project MythTV for MacOSX which has been set up to host release build of MythTV for the Mac OSX. If you do this, please make sure your build has FireWire support.
You can find details on how to contribute your build on the contributors page.
Sadly, the packager script doesn't always work. Maybe one of the downloadable dependencies has been outdated, and someone needs to try building against a newer one. Maybe the MythTV source code has changed and broken Mac builds. Look on the Myth_on_Mac_-_Build_status page for hints about this. Examining the build script output and the script itself may help. You may also set environment variables and build components yourself in the
.osx-packager/src subdirectory of your build directory.
To obtain a completely clean environment for a new build, you must delete all the prerequisite builds. The simplest way is to delete the build directory, using
rm -rf .osx-packager
This will delete all source code downloads and build output. Of course, it also means you will have to redownload all the prerequisites. More commonly, you just want a completely clean build using the existing downloads. This can be forced with
rm -rf .osx-packager/build osx-packager/src/*/
rm -rf .osx-packager/build osx-packager/src/*(/)
(This should probably be added as an option to the packaging script)