# readelf -d usr/bin/tcl

Dynamic segment at offset 0x99c contains 24 entries:
  Tag        Type                         Name/Value
 0x00000001 (NEEDED)                     Shared library: [libtclx8.2.so]
 0x00000001 (NEEDED)                     Shared library: [libtcl8.3.so]
 0x00000001 (NEEDED)                     Shared library: [libdl.so.2]
 0x00000001 (NEEDED)                     Shared library: [libc.so.6]
 0x0000000f (RPATH)                      Library rpath: []
 0x0000000c (INIT)                       0x804862c

There shouldn't be a enmpty RPATH. It means the current directory.