Are you looking for this?

  http://gcc.gnu.org/wiki/DebugFission

  <quote>
  Fission is implemented in GCC 4.7, and requires support from recent versions
  of objcopy and the gold linker.

  Use the -gsplit-dwarf option to enable the generation of split DWARF at
  compile time. This option must be used in conjunction with -c; Fission cannot
  be used when compiling and linking in the same step.
  </quote>

----- Original Message -----
From: "Benoit Girard" <[email protected]>
To: "Andreas Gal" <[email protected]>
Cc: "Kyle Huey" <[email protected]>, "dev-b2g" <[email protected]>
Sent: Tuesday, March 18, 2014 7:40:23 AM
Subject: Re: [b2g] GCC > 4.4 for B2G

On Fri, Mar 14, 2014 at 4:04 PM, Andreas Gal <[email protected]> wrote:

>
> I bet Clang would speed up our builds.
>

I believe build unification will improve our build times much more then
clang, see bug 950676. However gsplit-dwarf should help with incremental
link times. I can't find what GCC version we need for that.
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