Get source and compile
From Second Life Wiki
This information is for people who want to work with the source code for the viewer.
This is the latest Viewer code. Viewer code is stored in a Mercurial (hg) repository on bitbucket, an Open Source repository web site. There are many versions there; the ones you are most likely interested in being
You can browse the source code using an ordinary web browser, download it to your machine, or use Mercurial to manage the process for you.
One of the interesting features of the Viewer-Development branch is that you can literally watch Lindens merging bug fixes and new features into the code before your very eyes.
Another good way to browse the source code, including UML diagrams, is using Doxygen.
Be sure to read Creating a version control repository.
Viewer development uses the Mercurial (hg) distributed version control system. To clone the current release repository, use:
hg clone http://hg.secondlife.com/viewer-release
You are strongly encouraged to install the Linden Lab Mercurial Tools as well.
For a step-by-step outline of the source control workflow from the initial clone (above) to integration of your change, see Steps To Submit a Change.
Per platform instructions are available in these topics:
- Common compilation problems if you run into errors while building.
- Improving compilation time for information on how to compile faster
- LLMozLib2 for building LLMozLib2.
Autobuild is the new Linden Lab framework to maintain and build everything, from viewer to 3rd party libraries.
Hints on running
Channels and Versions
Channels are just groupings of versions. Linden Lab uses channels to track and supply updates for Project, Beta, and Release Viewers separately.
If you get a message while trying to start your compiled viewer that there is a required update, don't panic. All of your work is not lost. You (usually) don't have to apply your changes to a new source release to test your code. That's where channels come in.
On login, the combination of channel plus version is checked against a list. Within each channel, some versions are allowed and some are blocked. Viewers are blocked that are unsafe (security issues), incompatible (the protocol has been changed in some fundamental way), not supported (so old Linden Lab can't afford to provide support resources), or (most relevant here) are in a test channel (Release Candidate, First Look) and Linden Lab only wants test data from the most recent.
See Setting a Channel and Version for an Open Source Viewer for an explanation of how to do it in the source code.
See Channel and Version Requirements for a detailed explanation and official policy on how Linden Lab deals with channels and versions in Second Life.
The Third Party Viewer Policy requires that all viewers use a unique channel name. Please see here for more information.