So, this is make that will report 'fatal error: bearssl.h: No such file or directory'.
By the way, BearSSL does not seem to be in ArchLinux. Any plan to accept other TLS libraries?
Aye, BearSSL does not distribute a pkg-config file, so we need a different test.
There are no plans to support any other SSL libraries. You should ask Arch Linux to package it.
bearssl is available as an AUR package: https://aur.archlinux.org/packages/bearssl/