Unable to set minimum supported macOS version in cmake?

[Kylmakalle]

Hi. I don't see a clear option in cmake files to set -mmacos-version-min. It's supported for other Apple platforms

As for now, clang will decide about the version on it's own. For Xcode 14.2 (AppleClang 14.0.0.14000029) and macOS 12.6.5 build machine I'm getting a TDLib that's intended to be used on MacOS 12.6+

$ otool -l lib/libtdjson_static.a | grep -A5 -B1 -m1 "LC_BUILD_VERSION"
Load command 1
      cmd LC_BUILD_VERSION
  cmdsize 24
 platform 1
    minos 12.6
      sdk 13.1
   ntools 0

I've described how the parameter can be changed with custom build script for other Apple platforms here: #2405