Compiling ARM code

I have an Omap L-138.  I have code for the C6748 that compiles fine.  I have another project in CCS 5.5 for the ARM.  I am getting errors when compiling the ARM code.  When I include <std.h> I get the error "#error <std.h> types not supported for this target"

When I look at std.h, the code looks like:

#if defined(_54_) || defined(_6x_)
typedef Int Arg;
#elif defined(_55_) || defined(_28_)
typedef void *Arg;
#else
/* Other ISAs not supported */
#error <std.h> types not supported for this target
#endif

Can I not include std.h for the ARM? 

My ARM project in CCS 5.5 is setup so that under the family pulldown I set "ARM" and under variant I have "OMAPL138" set.  Is that correct?