Just compiled (O5! oh my) VICE, the CBM emulator. Upon execution, I get:

*** VICE Version 0.14.2 ***
Welcome to x64, the Commodore C64 Emulator for the X-Window System.

Copyright (c) 1993-1998
E. Perazzoli, T. Rantanen, A. Fachat, J. Valta, D. Sladic and J. Sonninen.

Couldn't find user's configuration file: using default settings.

Found 24bit/TrueColor visual.

Initializing RAM for power-up...
Kernal rev #3.

Initializing Serial Bus...

1541: ROM loaded successfully.
Cassette #1 installed.

Initializing graphics (MITSHM enabled)...

Error: cannot get shared memory.
Received signal 11 (Segmentation fault).

Exiting...
*WARNING!* couldn't release shared memory!

Whats up here?

                Nathan