Processing of {$UNITPATH} directives doesn't get reported in the verbose compiler output

Summary

When running the compiler with -vtb switch, it doesn't report unit paths added with the {$UNITPATH} directives.
At the same time, paths added by the -Fu switch are reported as expected.

I haven't checked, but the same might be true for other {$*PATH} directives as well.

System Information

• Operating system: Windows 7 Ultimate x64
• Processor architecture: x86-64
• Compiler version: 3.2.2
• Device: Computer

Steps to reproduce

program unitpath_bug;

{$UNITPATH ..}
{$UNITPATH test}

begin
  WriteL('compile me with -vtb')
  ReadLn();
end;

Let's assume this is saved as %USERPROFILE%\Desktop\bug_mre\unitpath_bug.lpr.

What is the expected (correct) behavior?

The compiler output with -vtb switch should have the following lines present:

• Assuming this is compiled using fpc -vtb unitpath_bug.lpr from %USERPROFILE%\Desktop\bug_mre\ as cwd:

  Using unit path: ..\
  Using unit path: .\test\

• Assuming this is compiled using fpc -vtb %USERPROFILE%\Desktop\bug_mre\unitpath_bug.lpr from an unrelated cwd:

  Using unit path: C:\Users\lmaokek\Desktop\
  Using unit path: C:\Users\lmaokek\Desktop\bug_mre\test\

What is the current bug behavior?

No associated lines are printed.