Hi, Willy
> > On Sat, Aug 05, 2023 at 02:13:11PM +0800, Zhangjin Wu wrote:
> > > To avoid pollute the source code tree and avoid mrproper for every
> > > architecture switch, the O= argument must be supported.
> > >
> > > Both IMAGE and .config are from the building directory, let's use
> > > objtree instead of srctree for them.
> > >
> > > If no O= option specified, means building kernel in source code tree,
> > > objtree should be srctree in such case.
> > >
> > > To support relative path, as suggested by Thomas, $(COMMAND_O) is used
> > > to pass the O=$(ABSOLUTE_O) to the $(MAKE) commands.
> >
> > Zhangjin, I cannot get this one to work, regardless of what I try:
> >
> > $ make -j8 O=$PWD/output-i386 nolibc-test XARCH=i386 CROSS_COMPILE=/f/tc/nolibc/gcc-12.3.0-nolibc/i386-linux/bin/i386-linux- CC=/f/tc/nolibc/gcc-12.3.0-nolibc/i386-linux/bin/i386-linux-gcc
> > (...)
> > CC nolibc-test
> > In file included from sysroot/i386/include/stdio.h:14,
> > from nolibc-test.c:13:
> > sysroot/i386/include/errno.h:10:10: fatal error: asm/errno.h: No such file or directory
> > 10 | #include <asm/errno.h>
> > | ^~~~~~~~~~~~~
> > compilation terminated.
> >
>
> Willy, I also just reproduced the issue, seems only i386 sysroot has no
> asm/errno.h, will check why it is no rightly installed later.
>
> $ find sysroot/ -name "errno.h"
> sysroot/arm/include/errno.h
> sysroot/arm/include/asm-generic/errno.h
> sysroot/arm/include/asm/errno.h
> sysroot/arm/include/linux/errno.h
> sysroot/riscv/include/errno.h
> sysroot/riscv/include/asm-generic/errno.h
> sysroot/riscv/include/asm/errno.h
> sysroot/riscv/include/linux/errno.h
> sysroot/s390/include/errno.h
> sysroot/s390/include/asm-generic/errno.h
> sysroot/s390/include/asm/errno.h
> sysroot/s390/include/linux/errno.h
> sysroot/arm64/include/errno.h
> sysroot/arm64/include/asm-generic/errno.h
> sysroot/arm64/include/asm/errno.h
> sysroot/arm64/include/linux/errno.h
> sysroot/mips/include/errno.h
> sysroot/mips/include/asm-generic/errno.h
> sysroot/mips/include/asm/errno.h
> sysroot/mips/include/linux/errno.h
> sysroot/x86_64/include/errno.h
> sysroot/x86_64/include/asm-generic/errno.h
> sysroot/x86_64/include/asm/errno.h
> sysroot/x86_64/include/linux/errno.h
> sysroot/i386/include/errno.h
> sysroot/i386/include/asm-generic/errno.h
> sysroot/i386/include/linux/errno.h
> sysroot/powerpc/include/errno.h
> sysroot/powerpc/include/asm-generic/errno.h
> sysroot/powerpc/include/asm/errno.h
> sysroot/powerpc/include/linux/errno.h
>
> > I'll leave it aside for now as I've spent way longer than I hoped on
> > these series. I could take the previous two patches however.
> >
>
> Ok, let's ignore this one, I will find why sysroot not install well for i386.
>
Thanks to Yuan, he have done some testing and have found the root cause, that
is mrproper on top-level source code tree is required before installing
sysroot, otherwise, the 'generated' headers will not be installed (removed by
scripts/Makefile.asm-generic).
After mrproper (not with O=out, must on top-level source code tree), the
asm/errno.h will be there:
ubuntu@linux-lab:/labs/linux-lab/src/linux-stable/tools/testing/selftests/nolibc$ find sysroot/ -name "errno.h"
sysroot/i386/include/errno.h
sysroot/i386/include/asm-generic/errno.h
sysroot/i386/include/asm/errno.h --> here it is
sysroot/i386/include/linux/errno.h
sysroot/x86/include/errno.h
sysroot/x86/include/asm-generic/errno.h
sysroot/x86/include/asm/errno.h --> here it is
sysroot/x86/include/linux/errno.h
That also means, to use O=out for run-user, we also need to use O=out for
defconfig (and kernel ...) too, otherwise, the top-level source code tree will
be polluated.
Seems a manual mrproper on top-level source code tree is always required for a
new iteration, so, it may be ok to pick this patch with a note on the potential
error.
Best Regards,
Zhangjin
> Thanks,
> Zhangjin
>
> > Thanks,
> > Willy
