"make installworld" fail r363660 -> r363689 (amd64)

[David Wolfskill]

build{worl,kernel} and installkernel were uneventful, but:

...
install -l h -o root -g wheel -m 555  /usr/bin/mail /usr/bin/Mail
install -l h -o root -g wheel -m 555  /usr/bin/mail /usr/bin/mailx
===> usr.bin/msgs (install)
install  -s -o root -g wheel -m 555   msgs /usr/bin/msgs
install  -o root -g wheel -m 444 msgs.1.gz  /usr/share/man/man1/
===> usr.bin/bmake (install)
install  -s -o root -g wheel -m 555   make /usr/bin/make
install  -o root -g wheel -m 444 make.1.gz  /usr/share/man/man1/
===> usr.bin/bmake/tests (install)
ld-elf.so.1: /common/S4/obj/usr/src/amd64.amd64/tmp/legacy/usr/sbin/make: Undefined symbol "regcomp at FBSD_1.6"
*** Error code 1
*** Error code 1
*** Error code 1
*** Error code 1
*** Error code 1

Stop.
make[1]: stopped in /usr/src
*** Error code 1

Running:
FreeBSD freebeast.catwhisker.org 13.0-CURRENT FreeBSD 13.0-CURRENT #986 r363660M/363660: Wed Jul 29 03:52:03 PDT 2020     root at freebeast.catwhisker.org:/common/S4/obj/usr/src/amd64.amd64/sys/GENERIC  amd64 1300102 1300102

src/UPDATING has a recent entry:
20200729:
        r363679 has redefined some undefined behavior in regcomp(3); notably,
        extraneous escapes of most ordinary characters will no longer be
        accepted.  An exp-run has identified all of the problems with this in
        ports, but other non-ports software may need extra escapes removed to
        continue to function.

but while there does seem to be some relevance, I'm not seeing what
sort of evasive maneuvers I need to make.

I would appreciate a suggestion.

Thanks!

Peace,
david
-- 
David H. Wolfskill				david at catwhisker.org
"White fear has become the unalloyed rallying cry of Trump's bid for a
second term." -- John Harwood, paraphrasing GOP strategist Stuart Stevens

See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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