Can not remove directory

[Boris Kovalenko]

Hello!

    Can not remove directory /usr/obj/usr/src/gnu/usr.bin/cc/cc1
rm: /usr/obj/usr/src/gnu/usr.bin/cc/cc1: Directory not empty

bash-2.05b# pwd; ls -la
/usr/obj/usr/src/gnu/usr.bin/cc/cc1
total 4
drwxr-xr-x   2 root  wheel  512 Oct  9 08:54 .
drwxr-xr-x  13 root  wheel  512 Oct  9 08:54 ..

bash-2.05b# pwd; ls -la
/usr/obj/usr/src/gnu/usr.bin/cc
total 26
drwxr-xr-x  13 root  wheel   512 Oct  9 08:54 .
drwxr-xr-x  21 root  wheel   512 Oct  9 11:23 ..
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 c++
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 c++filt
drwxr-xr-x   2 root  wheel   512 Oct  9 08:54 cc1
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 cc1obj
drwxr-xr-x   2 root  wheel  1024 Oct  9 08:55 cc1plus
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 cpp
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 cpp0
drwxr-xr-x   2 root  wheel   512 Sep 26 10:34 doc
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 gcov
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 protoize
drwxr-xr-x   2 root  wheel   512 Oct  9 08:55 tradcpp0

What is wrong? Current system is 5.1-RELEASE-p8

Yours truly,
    Boris Kovalenko