Date: Thu, 9 Jul 2020 16:44:58 +0100 From:

Does b2 -debug-configuration help?

https://boostorg.github.io/build/manual/master/index.html section 3.3 configuration

? You can use the --debug-configuration option to find which configuration files are actually loaded.

Thanks, Paul, this helped me figure out a colleague had modified a .jam file and checked it in. -d