Thanks for testing rachid. The build system of exult appears to not allow for cleanly disabling the features requiring that power function. New version coming soon

(edit:10:30) Pulling out code that calls the powf doesn't help, it's still linked-in to exult, meaning that error will continue to haunt.

(edit 13:45) used apt-get --reinstall install libstdc++6 to recover the old libs, copied the libstdc++ over to scratchbox and rebuilt. .. testing.. OK Fixed. Now. Really. I hope.

(edit 15:23) Added auto-savename-generation for users without keyboards

(edit 16:26) Moved all data from root filesystem and edited config files. No more data in ~/.exult or /usr/local/share. Changed sound fx to high quality. Added default keybindings. They currently are:

• Fullscreen Button: Toggle Combat
• Zoom Minus: Eat Food
• Zoom Plus: Use World Map (circle-arrow to exit)
• Dpad-Select: Enter key for menus
• Circle-Arrow: Esc / Hide Menu / Toggle Game Settings
• Menu-Button: Show maemo menu / toggle fullscreen

Exult for it2006 (and 2007?) 0.03 testing downloads:

exult Ultima 7 for Nokia page
Installation, Usage and Development Notes

Check the readme for usage. Post results here

(Edit: Starting a new game currently requires* a BT keyboard, synergy or vnc to input the player name. An alternate input method is coming real soon now.)
(Edit: First report from an N800 user {thanks Sulis!} that this build works on Bora / 800 as well. Frame rates claimed to be 50% faster in unscaled mode)