C:\temp>type tmp.pl
#!/usr/bin/perl -T
use FindBin ();
print $FindBin::Bin;

C:\temp>perl tmp.pl
Too late for "-T" option at tmp.pl line 1.

C:\temp>perl -T tmp.pl
Insecure dependency in chdir while running with -T switch at C:/Programme/Perl/l
ib/Cwd.pm line 419.
BEGIN failed--compilation aborted at C:/Programme/Perl/lib/FindBin.pm line 180.
Compilation failed in require at tmp.pl line 2.
BEGIN failed--compilation aborted at tmp.pl line 2.

C:\temp>perl -v

This is perl, v5.8.0 built for MSWin32-x86-multi-thread
(with 1 registered patch, see perl -V for more detail)

Copyright 1987-2002, Larry Wall

Binary build 804 provided by ActiveState Corp. http://www.ActiveState.com
Built 23:15:13 Dec  1 2002
...

/tmp> perl -wlT
#!/usr/bin/perl -T
use FindBin ();
print $FindBin::Bin;
^D
/tmp

/tmp> perl -v

This is perl, v5.8.0 built for i586-linux-thread-multi
[...]