[PATCH 3/3] isystem: delete global -isystem compile option

[Alexey Dobriyan]

On Mon, Aug 02, 2021 at 11:18:32AM -0700, Nathan Chancellor wrote:
> On Sun, Aug 01, 2021 at 11:13:36PM +0300, Alexey Dobriyan wrote:
> > In theory, it enables "leakage" of userspace headers into kernel which
> > may present licensing problem.
> > 
> > In practice, only stdarg.h was used, stdbool.h is trivial and SIMD
> > intrinsics are contained to a few architectures and aren't global
> > problem.
> > 
> > In general, kernel is very self contained code and -isystem removal
> > will further isolate it from Ring Threeland influence.
> > 
> > nds32 keeps -isystem globally due to intrisics used in entrenched header.
> > 
> > -isystem is selectively reenabled for some files.
> > 
> > Not compile tested on hexagon.
> 
> With this series on top of v5.14-rc4 and a tangential patch to fix
> another issue, ARCH=hexagon defconfig and allmodconfig show no issues.
> 
> Tested-by: Nathan Chancellor <nathan at kernel> # build (hexagon)

Oh wow, small miracle. Thank you!

Where can I find a cross-compiler? This link doesn't seem to have one
https://mirrors.edge.kernel.org/pub/tools/crosstool/files/bin/x86_64/11.1.0/