Upgrade from 12.2-RELEASE-p2 to 13.0-RELEASE

[Roman Serbski]

Hello,

I've just finished upgrading a server running 12.2-RELEASE-p2 to
13.0-RELEASE using "Updating FreeBSD from Source" section from
https://docs.freebsd.org/en/books/handbook/cutting-edge/#makeworld

Everything went well except that now, when I try to build a new kernel I get:

--- usbdevs.h ---
awk -f /usr/src/sys/tools/usbdevs2h.awk /usr/src/sys/dev/usb/usbdevs -h
--- rpctlscd.h ---
RPCGEN_CPP='cpp -target x86_64-unknown-freebsd13.0
--sysroot=/usr/obj/usr/src/amd64.amd64/tmp
-B/usr/obj/usr/src/amd64.amd64/tmp/usr/bin' rpcgen -hM
/usr/src/sys/rpc/rpcsec_tls/rpctlscd.x | grep -v pthread.h >
rpctlscd.h
ld-elf.so.1: Shared object "libgnuregex.so.5" not found, required by "grep"
*** [rpctlscd.h] Error code 1

make[2]: stopped in /usr/obj/usr/src/amd64.amd64/sys/BSD13TEST
1 error

make[2]: stopped in /usr/obj/usr/src/amd64.amd64/sys/BSD13TEST

make[1]: stopped in /usr/src

make: stopped in /usr/src

The file seems to be present:

# find / -name libgnuregex.so.5 -print
/usr/lib32/libgnuregex.so.5

# ls -al /usr/lib32/libgnuregex.so*
lrwxr-xr-x  1 root  wheel     16 Jan 19 14:49
/usr/lib32/libgnuregex.so -> libgnuregex.so.5
-r--r--r--  1 root  wheel  83044 Jan 19 14:49 /usr/lib32/libgnuregex.so.5

According to the release notes:

The BSD version of grep(1) is now installed by default. The obsolete
GNU version that was the previous default has been removed.

Any manual steps missed?

Thank you.