[LLVMdev] llvm-link deprecated in favor of gold plugin?

[Russell Wallace]

Ah, so the gold plugin does use the same Linker class as the other tools,
so that code should be considered current and actively maintained? Thanks.

I tried my test case just now with llvm-link on Linux and it worked
correctly, so I'm guessing there's a bug in the way the Linker class works
on Windows.

On Tue, Feb 10, 2015 at 5:09 PM, Teresa Johnson <tejohnson at google.com>
wrote:

> I don't recall hitting that but I am using a modified version of
> llvm-lto and the linking code to work on an LTO-related prototype (I
> find llvm-lto is easier than using the linker plugin for testing). My
> source code bits are also a little stale though.
>
> But llvm-lto is generally just a wrapper around the code that does the
> linking, which is shared with the gold plugin, and is where that
> assert comes from. So I am not sure why it would give an error like
> that assuming these are the same bitcode files you can successfully
> feed into an LTO link using gold.
>
> Teresa
>
> On Tue, Feb 10, 2015 at 8:58 AM, Russell Wallace
> <russell.wallace at gmail.com> wrote:
> > Ah! Okay. A quick test of llvm-lto gets an error:
> >
> > llvm-lto: error adding file 'main.bc': Linking COMDATs named '
> > ??_7_Iostream_error_category at std@@6B@': invalid selection kinds!
> >
> > Would it be the case that llvm-lto is also deprecated in favor of the
> gold
> > plugin?
> >
> > On Tue, Feb 10, 2015 at 4:47 PM, Teresa Johnson <tejohnson at google.com>
> > wrote:
> >>
> >> LTOCodeGenerator is used by the llvm-lto tool, which is a standalone
> >> tool for doing LTO links.
> >>
> >> Teresa
> >>
> >> On Tue, Feb 10, 2015 at 8:37 AM, Russell Wallace
> >> <russell.wallace at gmail.com> wrote:
> >> > Following on from my last question, based on such information as I've
> >> > been
> >> > able to find on Google, I get the impression llvm-link is effectively
> >> > deprecated / not actively maintained, because the focus of
> whole-program
> >> > optimization is now on the gold plugin. Is that the case, or am I
> >> > missing
> >> > something?
> >> >
> >> > Running searches over the source tree, it seems the Linker class that
> >> > actually implements the functionality of llvm-link is not used by any
> >> > other
> >> > modules except LTOCodeGenerator. I couldn't find anything referencing
> >> > LTOCodeGenerator. Does the gold plugin or anything else use
> >> > LTOCodeGenerator?
> >> >
> >> > _______________________________________________
> >> > LLVM Developers mailing list
> >> > LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
> >> > http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
> >> >
> >>
> >>
> >>
> >> --
> >> Teresa Johnson | Software Engineer | tejohnson at google.com |
> 408-460-2413
> >
> >
>
>
>
> --
> Teresa Johnson | Software Engineer | tejohnson at google.com | 408-460-2413
>
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