[llvm-dev] Passing arguments to LTOCodeGenerator

[Teresa Johnson via llvm-dev]

I recently added support for opt remarks to the gold plugin, in r330252.
The option names are:
-plugin-opt=opt-remarks-with-hotness
-plugin-opt=opt-remarks-filename=[filename]

(I used the same option names as used by lld, which unfortunately is
different than the ones added to the old LTO API)

Teresa

On Thu, May 3, 2018 at 8:27 AM, David Callahan via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> In LTOCodeGenerator.cpp there are some options related to optimization
> remarks.
>
> On MacOS, I can pass in this option to enable them:
>
>      -Wl,-mllvm,-lto-pass-remarks-output=remarks
>
>
>
> But on Linux using 2.29.1 binutils version of gold, I try this alternative:
>
>      -Wl,--plugin-opt,-lto-pass-remarks-output=remarks
>
>
>
> But I get this error message:
>
> LLVMgold: Unknown command line argument '--library=to-pass-remarks-output=remarks'.
> Try: 'LLVMgold -he\
>
> lp'
>
> LLVMgold: Did you mean '-no-warn=to-pass-remarks-output=remarks'?
>
>
>
> If I try this
>
>      -Wl,--plugin-opt=lto-pass-remarks-output=remarks
>
>
>
> I get
>
> LLVMgold: Unknown command line argument 'lto-pass-remarks-output=remarks'.
> Try: 'LLVMgold -help'
>
> clang-7: error: linker command failed with exit code 1 (use -v to see
> invocation)
>
>
>
> Any suggestions are welcome,
>
> Thanks
>
> david
>
>
>
>
>
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-- 
Teresa Johnson |  Software Engineer |  tejohnson at google.com |  408-460-2413
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