When doing a command line build I'm seeing some errors/messages that I'd like to understand.

1) I see a "CMake Deprecation Warning" about the cmake_minimum_required. Is this caused by the fact that I'm using a current version of cmake?

2) I get the error "IDF_TARGET is not set, guessed esp32 from ...

I'm seeing that using tzset does not seem to work properly for my timezone. The following code yields the wrong time value:

gmt time: [Wed Dec 9 05:31:27 2020]
local time: [Wed Dec 9 13:31:27 2020]

The offset is "-8", but it is treating it as +8. Am I doing something wrong or is there a known bug ...