See https://reviews.freebsd.org/D7533 for related PHB change.
Some ports build silently, hiding executed commands under non-informative summary, such as
CC source1.o CC source2.o CCLD someprogram
This is unacceptable as build logs are crucial to debugging port
build problems both on the cluster and based on end user feedback
and also global mining of build problems such as non-respected
C(XX)FLAGS and incorrect -I/-L ordering.
Mention the policy in CHANGES and enable verbose logs for cmake and ninja.