CMAKE_TLS_VERIFY — CMake 3.24.2 Documentation

# CMAKE_TLS_VERIFY

Specify the default value for the `file(DOWNLOAD)` and `file(UPLOAD)` commands' `TLS_VERIFY` options. If not set, the default is off.

This variable is also used by the `ExternalProject` and `FetchContent` modules for internal calls to `file(DOWNLOAD)`.

TLS verification can help provide confidence that one is connecting to the desired server. When downloading known content, one should also use file hashes to verify it.

    set(CMAKE_TLS_VERIFY TRUE)