I was porting a diagnostic command the other day, which displayed SMT status for the IBM power processor - written by a programmer at IBM. It was essentially a

I was porting a diagnostic command the other day, which displayed SMT status for the IBM power processor - written by a programmer at IBM. It was essentially a directory walk strncmp loop over /proc. The overwhelming sadness compelled me to spend a day of trying to figure out how far back I could trace direct evidence proving the existence of _SC_NPROCESSORS_CONF. Unfortunately I couldn't find the source code for SVR4.0MP, only references in interface manuals.