Hello, Python3 will be in the next major RHEL release. I don't mean RHEL 7.6, but with numbers higher than 7. There are many, many packages with something like the following
if 0%{?fedora} %define with_python3 1 %endif
If you have something like that, please change it to something like this.
if 0%{?fedora} || 0%{?rhel} > 7 %define with_python3 1 %endif
Thank You