isnan for ppc def help

[Matthew R Wette]

"Scully, Maureen" writes ...
> VxWorks user -
> 	Do you have any suggustions on how is can resolve the undefined
> symbol, isnan for the ppc?
> Some background info:
> 	I am using Tornado for VxWorks & Seawind for X/Motif/OpenGL support
> for VxWorks running on a PPC - power PC. Found your knowledgeable responses
> on a bulletin board when I search.  
> I think that someone else must had the same problem or can advise me on
> porting software to the VxWorks/PPC environment. VxWorks/PPC Tornados
> Windshell outputs: undefined symbols: isnan, equal, ent, directory,
> valid_path, and remove_dir...  These symbols are prototyped with a #ifdef
> unix and #ifdef mac differently. In these header files need to define a
> similar definition #ifdef VXWORKS for the PPC. isnan wrapper has the highest
> concern. 
> I not sure don't understand why isnan differs in MAC and Unix defs. How then
> does VxWorks needs to do to resolve these symbols. Tornado's C++ compiler
> does not seem to resolve after I tried similar definitions during build
> because later during run time, spawning the loaded executable this problem
> still shows up. The NFS, network file system should help in resolving  the
> variations in mkdir, chdir, rmdir. Not the comparable to isnan, valid_path,
> directory, ent, and equal under VxWorks.
> I think I need to load these symbol definitions in a *.o file, but I don
> understand them. 
> I was hoping someone could share their insight into this symbol issue? 

I find it odd that WRS left this out.  Anyway, probably the easiest
thing to do is grab newlib from ftp://sourceware.cygnus.com/pub .
and grab the routine from there (for ppc!).   I'm pretty sure it's
there.  All that the routine has to do is test a bit in the fp status
register.

Matt