Third Party Libraries

The following table lists libraries and other third party dependencies used in constructing the Second Life Viewer.

Most of these (all the open source ones) should be available as prebuilds packaged by and for use with Autobuild.

Anywhere that the following disagrees with the autobuild.xml file in the viewer source, that file is correct.

The license information here is incomplete... I am still verifying and updating the license information.

--- Oz Linden

To see how we manage changes made for our builds, see Mercurial Vendor Branching.

Library	Repository	License	Upstream Home	Description
apr_suite	3p-apr	Apache License	http://apr.apache.org/	"A set of C functions which provide a portable and consistent interface into operating system - or simply widely useful - functionality. We primarily use it for threading and socket i/o. This is actually three packages, apr, apr-util and apr-iconv."
ares	3p-ares	MIT License	http://daniel.haxx.se/projects/c-ares/	Performs DNS requests and name resolves asynchronously. Used with libcurl to keep all HTTP operations async.
boost	3p-boost	Boost License	http://www.boost.org/	A set of portable C++ libraries which provide a wide set of functionality. Used primarily for tokenization.
db	3p-dbus-glib	Academic Free License version 2.1M	http://www.oracle.com/technetwork/database/berkeleydb/overview/index.html	Berkeley DB library linked to linux viewer.
curl	3p-curl	BSD-styleB	http://curl.haxx.se/libcurl/	Handles moving data across the net in many different protocols. Used to GET/POST/PUT/DELETE web resources.
dbusglib	3p-dbus-glib			linux only dbus-glib headers
elfio (cruft)	3p-elfio	Open	http://sourceforge.net/projects/elfio/	Enhanced stacktrace information on the Linux client.
expat	3p-expat	Open	http://expat.sourceforge.net/	XML parser.
fmod	3p-fmod-privateLL	CommercialM	http://www.fmod.org	Audio engine and mp3 stream decoder
fontconfig	3p-fontconfig	Open
freeglut	3p-freeglut	Open
freetype	3p-freetype	Open	http://www.freetype.org/	Font engine.
gl	3p-gl
glh_linear	3p-glh_linear			nVidia NVParse SDK: platform-independent C++ Apple OpenGL helper library
glib	3p-glib	Open	http://www.gtk.org/
glui	3p-glui
google_breakpad	3p-google-breakpad	Open
google_mock	3p-google-mock	Open		Google C++ Mocking Framework (or Google Mock for short) is a library for writing and using C++ mock classes.
google_perftools	3p-google-perftools	Open		"Heap performance and validity checking tools from google. Includes TCMalloc, heap-checker, heap-profiler and cpu-profiler."
gstreamer	3p-gstreamer	Open	http://gstreamer.freedesktop.org
gtk_atk_pango_glib	3p-gtk-atk-pango-glib	Open		Libraries associated with GTK for gui features. atk: interfaces for accessibility; glib: low-level core functionality for using GTK+ and GNOME; pango: layout/rendering of text w/ emphasis on internationalization.
havok		Commercial
jpeglib	3p-jpeglib	Open	http://www.ijg.org/	JPEG decoder library.
jsoncpp	3p-jsoncpp	Open		an implementation of a JSON (http://json.org) reader and writer in C++.
kdu	3p-kdu-privateLL	Commercial	http://www.kakadusoftware.com	Kakadu (KDU) JPEG-2000 decoder library.
libmono	3p-libmono	Open	talk to kelly	An open source implementation of the ECMA/ISO ECMA-334 Common Language Infrstructure (CLI) international standard
libpng	3p-libpng	Open	http://www.libpng.org/pub/png/libpng.html	PNG image library.
libuuid	3p-libuuid	Open	http://e2fsprogs.sourceforge.net/	Generates UUIDs under Linux. Originally a part of the ext2fs filesystem. Also see lluuid.cpp for all platforms.
libxml	3p-libxml
llmozlib	n/a	Open	http://ubrowser.com/llmozlib.php	llMozLib handles rendering HTML in the viewer via an embedded Gecko (http://www.mozilla.org/developer/ Mozilla) engine.
llqtwebkit	(llqtwebkit named branch) 3p-qt (llqtwebkit named branch)	Open
mesa	3p-mesa	?	http://www.mesa3d.org/	Provides the required OpenGL headers under Linux.
mysql	3p-mysql	Open
mysqlclient	3p-mysqlclient	Open
ndofdev	3p-libndofdev	Open		Provides joystick driver support (mac and win) for the 3DConnexion SpaceNavigator. This is not http://3dconnexion.com/service/software-developer.html , but probably should be.
ogg_vorbis	3p-ogvorbis	Open	http://xiph.org/ogg/	Audio control.
openal	3p-openal	Open	http://connect.creativelabs.com/openal/default.aspx
openjpeg	3p-openjpeg	Open	http://www.openjpeg.org/	An open-source JPEG-2000 library; a slower alternative to Kadaku. Used in the open source release
openssl	3p-openssl	Open	http://www.openssl.org/	Provides encryption for sensitive actions such as user login
pth	3p-pth		http://www.gnu.org/software/pth/	Provides 10.4 support for the boost::coroutine library
quicktime	3p-quicktime		http://developer.apple.com/quicktime/	Used to play in-world video clips on a prim. See Movie_System
sdl	3p-SDL		http://www.libsdl.org/index.php	The Simple DirectMedia Layer libraries are used for handling input and basic window/GL setup on the Linux client.
slvoice		Commercial		This is the Vivox provided executable (renamed SLVoice)
tut	3p-tut	Open	http://tut-framework.sourceforge.net/	Unit test framework based on the use of c++ meta template programming. Used to test LL libraries.
unistd	3p-unistd
xmlrpc_epi	3p-xmlrpc-epi	Open	http://xmlrpc-epi.sourceforge.net/	Controls the XML-RPC protocol.
zlib	3p-zlib	Open	http://www.zlib.net/	zlib is a lossless data-compression library which is used for a variety of network i/o and file compression.

LL

This repository is internal to Linden Lab.

M

This library is available under multiple licenses; the license shown is the one under which the Second Life Viewer Project is using it. See sources for details of alternatives.

B

This library is available under a license substantially similar to the traditional BSD license. See sources for details.

Redistribution

Some files in the SL installation can't be freely redistributed. This means it's not possible to simply package and offer for download a modified viewer: some files must not be redistributed.

This page documents the licenses and redistribution requirements of various files used by the viewer.

Windows

These are the files that need to be shipped with the Windows version

Runtime

Microsoft components. It's not yet known whether they're redistributable.

• dbghelp.dll: Redistributable
• msvcp71.dll: C++ Runtime Library, redistributable -viewer now using msvcp80.dll when compiled with VC2005
• msvcr71.dll: C Runtime Library, Redistributable -viewer now using msvcr80.dll when compiled with VC2005

FONTS

Meta font software files

From the Readme.txt

The Meta font software files contained in this folder are the
copyrighted property of FSI FontShop International ("FSI") and are
licensed by FSI solely for use by Linden Research, Inc. and by
residents or users of Second Life in the Second Life environment,
subject to the Second Life Terms of Service.  These Meta font software
files may not be copied by residents or developers of Second Life or
used by them for any other purpose whatsoever.

• MtBkLfRg.ttf
• MtBdLfRg.ttf

NOTE: These files must be replaced for an true opensource build

FMOD

FMOD sound library. Free for non-commercial projects. A commercial license will be needed for a commercial viewer.

From the README in the package:

The fmod.dll file may be redistributed without the authors prior permission, 
and must remain unmodified.  The use of dll 'static linking' tools that aim
to hide the fmod library are forbidden.

• fmod.dll: Redistributable, free for non-commercial projects

Mozilla

The Gecko engine is MPL/GPL/LGPL licensed, which makes it redistributable.

• app_settings/mozilla
• freebl3.dll
• gksvggdiplus.dll
• js3250.dll
• nspr4.dll
• nss3.dll
• nssckbi.dll
• plc4.dll,
• plds4.dll
• smime3.dll
• softokn3.dll
• ssl3.dll
• xpcom.dll
• xul.dll

Kakadu

JPEG2000 library. Not redistributable. OpenJPEG is an alternative library that is redistributable

• llkdu.dll

Starting with Viewer 2.5, llkdu.dll has been phased out. The libkdu.a and kdu.lib are still not redistributable but can be built from the toolkit provided by Kakadu under a license. How to build a viewer with such a library is documented in KDU Implementation.

OpenSSL

SSL library. Redistributable.

• libeay32.dll
• ssleay32.dll

Vivox

Vivox is the component that provides the voice functionality.

• SLVoice.exe: Voice daemon. Not redistributable
• SLVoiceAgent: Exact purpose unknown. Not redistributable
• alut.dll: OpenAL, by Creative Labs. Redistributable.
• ortp.dll: oRTP project, LGPL. Redistributable.
• srtp.dll: Secure RTP?
• vivoxsdk.dll: Vivox Communications API. Not redistributable
• wrap_oal.dll: OpenAL32 by Creative Labs. Redistributable.

Unknown Libraries

The purpose and licensing of these files is not known:

• tntk.dll: Probably Vivox related -see Voice/Technical for other info on ViVox files