error: undefined symbol: OPENSSL_cpuid_setup

[bob prohaska]

While playing with compiling www/chromium, I'm seeing make stop with
/usr/bin/ld.lld: error: undefined symbol: OPENSSL_cpuid_setup

This is on a Raspberry Pi 3 running 
FreeBSD www.zefox.org 12.0-ALPHA7 FreeBSD 12.0-ALPHA7 r338880 GENERIC
with ports at
480613

World and kernel build, install and run acceptably, so the system as
a whole isn't hugely broken. Can anybody suggest a fix/workaround?

Thanks for reading!

bob prohaska