header installation not make-jobs safe?

[Thomas Klausner <wiz%NetBSD.org@localhost>]

Hi!

I had an interesting build failure today when using

build.sh -j 32 -x -V MKDEBUG=yes -V MKDEBUGLIB=yes -V MKLLVM=yes -T /usr/obj/tools.gcc -m amd64 -O /usr/obj/src.amd64 -D /usr/obj/amd64.gcc.20240411 -R /usr/obj/amd64.gcc.20240411.release distribution

The build stopped quite early with:

--- /usr/obj/amd64.gcc.20240411/usr/include/krb5/krb5_asn1.h ---
*** Failed target: /usr/obj/amd64.gcc.20240411/usr/include/krb5/krb5_asn1.h
*** Failed commands:
        @cmp -s ${.ALLSRC} ${.TARGET} > /dev/null 2>&1 ||  (${_MKSHMSG_INSTALL} ${.TARGET};  ${_MKSHECHO} "${INSTALL_FILE} -o ${BINOWN} -g ${BINGRP}  -m ${NONBINMODE} ${.ALLSRC} ${.TARGET}" &&  ${INSTALL_FILE} -o ${BINOWN} -g ${BINGRP}  -m ${NONBINMODE} ${.ALLSRC} ${.TARGET})
        => @cmp -s krb5_asn1.h /usr/obj/amd64.gcc.20240411/usr/include/krb5/krb5_asn1.h > /dev/null 2>&1 ||  (echo '#  ' "install " /usr/obj/amd64.gcc.20240411/usr/include/krb5/krb5_asn1.h;  echo "/usr/obj/tools.gcc/bin/x86_64--netbsd-install  -N /disk/storage-202004/archive/foreign/src/etc -c  -r -o root -g wheel  -m 444 krb5_asn1.h /usr/obj/amd64.gcc.20240411/usr/include/krb5/krb5_asn1.h" &&  /usr/obj/tools.gcc/bin/x86_64--netbsd-install  -N /disk/storage-202004/archive/foreign/src/etc -c  -r -o root -g wheel  -m 444 krb5_asn1.h /usr/obj/amd64.gcc.20240411/usr/include/krb5/krb5_asn1.h)
*** [/usr/obj/amd64.gcc.20240411/usr/include/krb5/krb5_asn1.h] Error code 1
nbmake[4]: stopped in /disk/storage-202004/archive/foreign/src/crypto/external/bsd/heimdal/lib/libasn1

A second try of the same command on the same machine with the same
sources succeeded.

Full log available on request.
 Thomas