[PATCH 1/1] powerpc: use __clang__ instead of CONFIG_CC_IS_CLANG

[Shung-Hsi Yu]

On Tue, Feb 18, 2025 at 08:54:03AM +0100, Michal Suchánek wrote:
> Hello,
> 
> how does this happen?
> 
> On Tue, Feb 18, 2025 at 12:48:01PM +0800, Shung-Hsi Yu wrote:
> > Due to include chain (below), powerpc's asm-compat.h is part of UAPI,
...
> >   include/uapi/linux/ptrace.h
> >   arch/powerpc/include/asm/ptrace.h
> 
> There is arch/powerpc/include/uapi/asm/ptrace.h
> 
> and if the installed header is used this is what should be included.
> 
> That does no include other asm headers.

Ah. Then asm-compat.h not, my bad.

I thought bcc[1] was pulling the kernel headers like a userspace
program, but it's actually pulling them in as if building a kernel
module, thus include path has arch/powerpc/include/asm/ptrace.h before
arch/powerpc/include/uapi/asm/ptrace.h[2].

> Thanks
> 
> Michal
...

1: https://github.com/iovisor/bcc
2: https://github.com/iovisor/bcc/blob/5bc97bb/src/cc/frontends/clang/kbuild_helper.cc#L81-L120