Defined in 4 files as a macro:
- contrib/gcc/config/rs6000/aix.h, line 256 (as a macro)
- contrib/gcc/config/rs6000/freebsd.h, line 247 (as a macro)
- contrib/gcc/config/rs6000/linux.h, line 29 (as a macro)
- contrib/gcc/config/rs6000/linux64.h, line 282 (as a macro)