Which version? If it's version 2.0, then according to http://en.wikipedia.org/wiki/Turbo_C
this is dated 1989, which at almost 20 years old almost certainly predates long filenames.
I can't see any reason for using such an old compiler. If you want free and don't mind closed source, then the compilers from Microsoft Visual Studio 2008 can be downloaded for free (lookup "Visual Studio Express").