Difficulty building mesaflash with MX 19.4

I've been using the excellent guide pinned at the top of this section to install LinuxCNC on MX. I posted this at the end of that thread but thought I'd also post it standalone in case somebody who isn't monitoring that thread has an idea.

I've run into a hitch at the point in the guide where mesaflash is cloned an built. When I clone mesaflash and run make, I get the error

"Makefile:61: ***"pkg-config can't find libcrypto". Stop."

I have libcrypto++6 and libcrypto++-dev installed.

Output from uname -a is
Linux novakon 4.19.0-18-rt-amd64 #1 SMP PREEMPT RT Debian 4.19.208-1 (2021-09-29) X86_64 GNU/Linux

Any pointers are greatly appreciated! I'm not sure where else this dependency might live. Openssl is also installed.

Same error here on Debian 11.

The github/mesaflash site appears to have some sort of very recent update or modifications going on for Debian 11, but I don't understand the developer language/jargon.

Post the complete error report.

That's all there is in the terminal...

Is there somewhere else I should look for error logs?

Answering my own question for anyone else with the issue: installing libssl-dev

gave me the missing dependency. Working fine now!

I added it to the README.md file two days ago:
github.com/LinuxCNC/mesaflash/pull/65/co...ed7da5efff46f6fe1b4c