Lpc2000

My debugger (nohau) takes offense when it steps into thumb code, telling
me I need to change compiler debug options for disassembly to work
properly.  It sees the 'T' bit get set, but does not understand that
it's stepping into a THUMB region.

Is there an arm-elf-gcc compiler option required to include debug info
saying whether a file has been compiled in thumb mode or not?