Nightly builds of LLDB are packaged and tested from trunk:

• Debian and Ubuntu: llvm.org/apt

The pkgsrc framework offers a package with recent LLDB in the wip repository:

cd pkgsrc/wip/lldb-git
make install clean

Debian packages are available for LLDB 3.2 and later.

• LLDB 3.4 - incremental release (experimental)
• amd64 (x86-64)
• System/390 (i386)
• LLDB 3.3 (unstable)
• LLDB 3.2 (unstable)