[LLVMdev] Customize Standard C Library Using LLVM (to support llvm backend optimization)

[Richard Gorton]

I can confirm that musl builds and works correctly with clang/llvm. We 
are using musl as a libc for our architecture.
It has a much smaller code footprint than newlib or glibc.

Regards,

     Richard


On 3/11/2015 4:24 PM, Chao Yan wrote:
>
>         FWIW, I build baremetal newlib for arm-eabi using clang, and
>         it works. I had to patch a few of the __attribute__((naked))
>         functions because they were using pre-UAL asm syntax, but for
>         the most part it "just works".
>
>
> I build the baremetal newlib using arm-none-eabi-gcc as well, but 
> after linking with the hello world program, it failed to run on both 
> qemu-arm and gem5.
>
>
>
>     Have you considered trying musl? It's supposed to be a full
>     replacement for glibc.
>
>
> It looks like a nice alternative, I'll certainly look into it right away.
>
>
>     Have you run it in a debugger to figure out *why* it is
>     segfaulting? Have you tried building it without your special pass?
>
> Well, I didn't try clang, I use arm-none-eabi-gcc to build the newlib 
> and the hello world program. The arm-none-eabi-gdb says "Don't know 
> how to run.  Try "help target"."
>
>
>
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