Nelson Beebe reported on gnupg-devel:
I did, however, build and install npth-1.3 everywhere, replacing
earlier 1.1 versions on the lab systems. That, at least, went
smoothly, except that for most BSD-family systems, I had to manually
restart the builds with
make LIBS=-lpthread all check
because the npth-1.3 configure script apparently did not figure out
that -lpthread was needed on those systems.