Hello
Please check "{Install}\Help\PDF\ColdFire_Build_Tools_Reference.pdf", chapter "Coldfire Runtime Library" section "MSL for Coldfire Development".
Per default when you create a project for MCF5223x the project wizard links the application against the Reduced working set library.
If you need floating point support you need to link against the fully compliant libraries.
You can also look at this thread for more information.
http://forums.freescale.com/freescale/board/message?board.id=CWCFCOMM&message.id=762&query.id=9198#M...
CrasyCat