ld: fatal: file TMApp.o: unknown file type

[Jeff Lacki]

Im getting the following on solaris sparc using the 
sun CC compiler and wxwidgets 2.8.7:

**** Compiling TMApp.o
CC -D_SOLARIS -D_REENTRANT -I. -I/usr/include -I/usr/local/include/wx-2.8 -I/usr/local/lib/wx/include/GTK2-ansi-release-2.8 -I/usr/local/include/wx-2.8 -D_FILE_OFFSET_BITS=64 -D_LARGE_FILES -D__WXGTK__ -mt -D_REENTRANT  TMApp.cpp -o TMApp.o
ld: fatal: file TMApp.o: unknown file type
ld: fatal: File processing errors. No output written to TMApp.o
gmake: *** [TMApp.o] Error 1

Ive never seen this type of error before.
Anyone know what it means and how I fix it?

Thanks for the help
Jeff