how to check if I Thread safe glibc or Non-Thread safe glibc Linux

Hi,

I'm trying to a debugger but I have to first determine if the glibc is TS or non-TS:
+---------------+-----------+---------------------+-----------------------------+-------------+----------+
| Linux         | x86, 32   | glibc >= 2.3        | dbg-4.6.4-Linux.tar.gz      | x86         |          |
| Linux         | x86, 64   | glibc >= 2.3        | dbg-4.6.4-Linux.tar.gz      | x86_64      | 6        |
| Linux         | x86, 32   | TS glibc >= 2.3     | dbg-4.6.4-Linux.tar.gz      | x86_TS      |          |
| Linux         | x86, 64   | TS glibc >= 2.3     | dbg-4.6.4-Linux.tar.gz      | x86_64_TS  

What's the command for this?

Thanks,
Victor