configure fails unless --enable-developer is specified

Summary

./configure produces an error about finding cmocka

Steps to reproduce

run either ./configure or ./configure --disable-developer or ./configure --with-cmocka=<path>

note that this happens regardless of the presence of cmocka.h and friends on the system, and as long as cmocka is installed, ./configure --*enable*-developer will work.

What is the current bug behavior?

checking for cmocka.h... yes
checking for library containing cmocka_run_group_tests... no
configure: error: cmocka unit testing framework not found in  path

What is the expected correct behavior?

when we are not compiling the unit tests, we should not see a check for cmocka at all, and when we specify to use cmocka, it should find all of it's required parts, as happens when enable-developer is specified