How to change gcc from clang at build kernel and world?

[Warner Losh]

You should be able to get the build with
WITH_GCC_BOOTSTRAP=YES WITH_GCC=YES WITHOUT_CLANG_BOOTSTRAP=YES and
WITHOUT_CLANG=YES

There's also supposed to be a command line arg to clang to keep it
from using bx instructions. So that's messed up.

But if the compiler-rt stuff, which I haven't looked at, has a naked
bx instruction, we'll need an ifdef.

Warner

On Sun, Jul 3, 2016 at 6:46 PM, Mori Hiroki <yamori813 at yahoo.co.jp> wrote:
> Hi.
>
> I make support Eventtimer and FDT and INTRNG to cns11xx code.
>
> This is almost done. But hang up at init. I think it's a interrupt issue.
>
> https://gist.github.com/yamori813/ae047a28a825aac255e436fd8ccaf785
>
>
> https://github.com/yamori813/freebsd/tree/zrouter/sys/arm/cavium/cns11xx
>
>
> cns11xx is arm4(not arm4t).  arm build on head is change to use clang
> several month ago. I want use gcc at buildworld and buildkernel.
>
> Because of clang use bx instruction. bx instruction not support arm4.
>
> How do I change to gcc from clang?
>
> I found bx instruction at
>
> contrib/compiler-rt/lib/builtins/arm/
>
> It must be changed bx to mov instruction.
>
> Regards.
>
> Hiroki Mori
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