cyrus-sasl-saslauthd-2.1.26 auth_krb5.c compile error

Upgrading cyrus-sasl-saslauthd-2.1.25 to the current cyrus-sasl-saslauthd-2.1.26, I started to get auth_krb5.c compile errors that were terminating the compile like:

: warning: this is the location of the previous definition
mv -f .deps/auth_getpwent.Tpo .deps/auth_getpwent.Po
cc -DHAVE_CONFIG_H
-DSASLAUTHD_CONF_FILE_DEFAULT=\"/usr/local/etc/saslauthd.conf\" -I. -I.
-I.. -I. -I./include -I./include -I./../include   -I/usr/local/include
-DKRB5_HEIMDAL -I/usr/local/include  -O3 -pipe -march=native
-DLDAP_DEPRECATED -fno-strict-aliasing -MT auth_krb5.o -MD -MP -MF
.deps/auth_krb5.Tpo -c -o auth_krb5.o auth_krb5.c
In file included from mechanisms.h:35,
                 from auth_krb5.c:51:
saslauthd.h:190:1: warning: "KRB5_HEIMDAL" redefined
: warning: this is the location of the previous definition
auth_krb5.c: In function 'auth_krb5_init':
auth_krb5.c:105: warning: assignment discards qualifiers from pointer
target type
auth_krb5.c:106: warning: assignment discards qualifiers from pointer
target type
auth_krb5.c: In function 'auth_krb5':
auth_krb5.c:184: error: 'krb5_verify_opt' undeclared (first use in this
function)
auth_krb5.c:184: error: (Each undeclared identifier is reported only once
auth_krb5.c:184: error: for each function it appears in.)
auth_krb5.c:184: error: expected ';' before 'opt'
auth_krb5.c:233: error: 'opt' undeclared (first use in this function)
*** Error code 1

Stop in
/usr/ports/security/cyrus-sasl2-saslauthd/work/cyrus-sasl-2.1.26/saslauthd.
*** Error code 1

Stop in
/usr/ports/security/cyrus-sasl2-saslauthd/work/cyrus-sasl-2.1.26/saslauthd.
*** Error code 1

Stop in /usr/ports/security/cyrus-sasl2-saslauthd.

with some expert advice from the port maintainer, Hajimu UMEMOTO (what is not to love about BSD and open source? Something goes wrong, the guy who knows everything about it tells you how to fix it right away). He correctly ascertained that I had security/krb5 installed, a dependency of openssh-portable. Kerberos, HEIMDAL and GSSAPI occasionally have interactions, but his advice was to make with the directive KRB5_HOME=/usr/local. I put this into /etc/make.conf to make it permanent, deinstall/reinstalled security/krb5 and then cyrus-sasl-2.1.26 compiled perfectly.

Thanks Mr Umemoto!