On Thu, 16 Dec 2021 03:32:10 +0300 Andrew Savchenko wrote:
> On Wed, 15 Dec 2021 16:58:26 +0200 Adrian Ratiu wrote:
> > Starting with kernel>=v5.7 the build system can override the
> > tools vars by setting LLVM=1 [1], but older kernels still use
> > the default GNU tools, so to be able to use a full LLVM/Clang
> > build, CC should be set together with AR to the portage set
> > values.
> >
> > Doing this avoids situations like building the kernel with
> > clang (using the set HOSTCC) but using gcc/gnu-ar for headers.
> >
> > [1] a0d1c951ef08 kbuild: support LLVM=1 to switch the default tools to
> > Clang/LLVM
> >
> > Co-authored-by: Manoj Gupta <manojgu...@chromium.org>
> > Signed-off-by: Adrian Ratiu <adrian.ra...@collabora.com>
> > ---
> > eclass/kernel-2.eclass | 2 +-
> > 1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/eclass/kernel-2.eclass b/eclass/kernel-2.eclass
> > index adc1425bc2e..caeec86ff59 100644
> > --- a/eclass/kernel-2.eclass
> > +++ b/eclass/kernel-2.eclass
> > @@ -692,7 +692,7 @@ env_setup_xmakeopts() {
> > elif type -p ${CHOST}-ar >/dev/null; then
> > xmakeopts="${xmakeopts} CROSS_COMPILE=${CHOST}-"
> > fi
> > - xmakeopts="${xmakeopts} HOSTCC=$(tc-getBUILD_CC)"
> > + xmakeopts="${xmakeopts} HOSTCC=$(tc-getBUILD_CC) CC=$(tc-getCC)
> > AR=$(tc-getAR)"
>
> OBJDUMP should be exported as well
> (e.g. used by scripts/Makefile.build)And LD as well. > > export xmakeopts > > } > > > > > Best regards, > Andrew Savchenko Best regards, Andrew Savchenko
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