I can't cross build 10 on 10??

[Lloyd Parkes <lloyd%must-have-coffee.gen.nz@localhost>]

Hi all,
I recently started trying to build 10_BETA for some of my non-amd64 
platforms using my 10_BETA amd64 build hosts and it just won't work.

It looks like something is going wrong with the host tools and they are 
trying to use host includes when they should be using in-tree includes. 
One concise example is

> #   compile  csu/gcrt0.o
> /home/lloyd/NetBSD/tooldir/bin/sparc--netbsdelf-gcc     --sysroot=/home/lloyd/NetBSD/destdir -DELFSIZE=32 -I/home/lloyd/NetBSD/src/lib/csu/arch/sparc -I/home/lloyd/NetBSD/src/lib/csu/common -I.  -x assembler-with-cpp -c /home/lloyd/NetBSD/src/lib/csu/arch/sparc/crt0.S -o gcrt0.o.S.o
> /home/lloyd/NetBSD/tooldir/bin/sparc--netbsdelf-gcc -O2      -std=gnu99    -Wall -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith -Wno-sign-compare  -Wsystem-headers   -Wno-traditional   -Wa,--fatal-warnings  -Wreturn-type -Wswitch-Wshadow -Wcast-qual -Wwrite-strings -Wextra -Wno-unused-parameter -Wno-sign-compare -Wold-style-definition -Wsign-compare -Wformat=2  -Wno-format-zero-length -Werror     --sysroot=/home/lloyd/NetBSD/destdir -DELFSIZE=32 -I/home/lloyd/NetBSD/src/lib/csu/arch/sparc -I/home/lloyd/NetBSD/src/lib/csu/common -I.  -c -fPIC -DMCRT0 /home/lloyd/NetBSD/src/lib/csu/common/crt0-common.c -o gcrt0.o.c.o
> /home/lloyd/NetBSD/src/lib/csu/common/crt0-common.c:150:10: fatal error: machine/elf_support.h: No such file or directory
>   150 | #include <machine/elf_support.h>
>       |          ^~~~~~~~~~~~~~~~~~~~~~~
> compilation terminated.
> *** Failed target: gcrt0.o
> ...
> ┌──(lloyd@ceph4)-[~/NetBSD/src]
> └─$ find . -name elf_support.h      
> ./sys/arch/sparc/include/elf_support.h
> ./sys/arch/sparc64/include/elf_support.h

For some reason, the include path isn't set correctly. I can see that 
the missing files are in the tree.

I'm using sources from Mercurial and I can see that my local changes are 
utterly trivial and I do _seem_ to have reasonably up to date sources 
judging by the most recent commit message that says "Tickets #145 - #150".

> ┌──(lloyd@ceph4)-[~/NetBSD/src]
> └─$ hg status
> M etc/rc.d/entropy
> M share/man/man7/entropy.7
> M sys/arch/amd64/conf/GENERIC
> ┌──(lloyd@ceph4)-[~/NetBSD/src]
> └─$ hg sum   
> parent: 1023970:7893cdb2b634 
>  Tickets #145 - #150
> branch: netbsd-10
> commit: 3 modified
> update: (current)

I've tried deleting destdir, objdir, releasedir and tooldir with no 
change in behaviour.

Do I remember this being discussed before? Am I going mad? Probably. Any 
help will be appreciated.

Cheers,
Lloyd