[LLVMdev] Using Compiler-RT with Clang on ARM

[Daniel Dunbar]

Hi Renato,

I don't think the compiler-rt support on non-Darwin platforms was ever
finished (by me) and hasn't since been wired up or developed. You will
probably need to add it, but I suspect it should be pretty straightforward.

 - Daniel


On Wed, Feb 5, 2014 at 2:35 AM, Renato Golin <renato.golin at linaro.org>wrote:

> Hi Daniel,
>
> I'm trying to use the feature you added to Clang a long time ago (2011),
> the --rtlib=compiler-rt and it doesn't seem to do anything.
>
> Now that I have compiler-rt building on ARM and the archive libraries
> under /lib, I'd like to replace -lgcc with -lclang_rt, but this command
> line:
>
> $ clang --rtlib=compiler-rt -Wl,-lclang_rt foo.c
>
> Gives me the warning/errors:
> clang-3.5: warning: argument unused during compilation:
> '--rtlib=compiler-rt'
> /usr/bin/ld: error: cannot find -lclang_rt
>
> The library path for compiler-rt is missing and -lgcc is still there,
> while it shouldn't.
>
> Is there any simple way of doing that with Clang?
>
> cheers,
> --renato
>
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