[HEADS UP] enabling LLDB debugger by default on amd64

[David Chisnall]

Hi Ed,

How are you planning on building the LLVM / Clang libraries?  Will they be statically linked to the compiler and the debugger, or do you intend to make them dynamic too?  I found about a small slowdown with a dynamic clang, but the link times were much lower when building.  

Currently, the LLVM build is one of the big serialisation points in our build system (we build each of the individual libraries entirely independently), so if you're hacking on the build system it would perhaps be nice to build a single libLLVM (in /lib/private) that could compile all of the LLVM sources in parallel and then be used by Clang and LLDB (and any LLVM-based binutils replacements we start to add).  This would likely more than offset the increased build time for LLDB on any multicore system.

David

On 17 Dec 2013, at 22:15, Ed Maste <emaste at freebsd.org> wrote:

> The in-tree snapshot of LLDB is at a point where it's usable and
> suitable for wider testing on amd64, and so I intend to enable it by
> default in the near future.
> 
> Further information on the FreeBSD port of LLDB is on the wiki, at
> https://wiki.freebsd.org/lldb
> 
> On my desktop LLDB added about 5 minutes to a buildworld and 80MB to
> objdir (over a baseline of about an hour and 1.8GB).  If you wish to
> avoid building it, you can add 'WITHOUT_LLDB=' to src.conf.
> 
> -Ed
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