[llvm-dev] (Thin)LTO llvm build

[Xinliang David Li via llvm-dev]

bfd linker 2.26 works fine with LLVMgold.so.   As I mentioned in a previous
email, 2.26 ar and ranlib also works fine as long as LLVMgold.so is put in
a path binutils know about : $(bindir)/../lib/bfd-plugins/

David

On Sun, Oct 2, 2016 at 3:59 AM, Carsten Mattner <carstenmattner at gmail.com>
wrote:

> On Sun, Oct 2, 2016 at 6:52 AM, Teresa Johnson <tejohnson at google.com>
> wrote:
>
> > But something is odd then - if the builds aren't using gold then I don't
> > see how ThinLTO could have been kicking in?
>
> I'm not an expert on LLVM's build process, but it's important to note that
> the
> failure was immediately upon trying to run cmake with the extended LDFLAGS,
> which now includes the extra flags to enable more pruning.
>
> My understaning was that ld.gold is required for the plugin to do ThinLTO,
> and given my observation before/after enabling llvm-ar/llvm-ranlib to make
> LTO work, and how long the ld processes took for executables and DSOs,
> I'm under the impression that ld.gold was actually used.
>
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