Installing and updating print/tex-luatex successfully when setting environment to "env CC=/usr/bin/cc CXX=/usr/bin/c++" (see Bug 234221) on CURRENT host (13.0-CURRENT #81 r354210: Thu Oct 31 06:35:08 CET 2019 amd64) with recent tree (r516289), the error as follows occurs at the end of the procedure, the installation is performed successfully.
I'm wondering if this might be an issue:
====> Running Q/A tests (stage-qa)
Error: /usr/local/bin/luajittex is linked to /usr/local/lib/libgmp.so.10 from math/gmp but it is not declared as a dependency
Warning: you need LIB_DEPENDS+=libgmp.so:math/gmp