[TUHS] Re: Other POSIX Candidates?

segaloco via TUHS <tuhs(a)tuhs.org> wrote: This. Try to understand what things were like at the time. There were a ton of competing Unix systems, all different: - IBM: AIX on the mainframe and PS/2, which were different from AIX on the RT/PC and later RS/6000 (workstations). - DEC: Ultrix on minicomputers and microvaxen, and later on MIPS based workstations - Data General: DG/UX on their minicomputers. - Pyramid: A BSD/System V hybrid RISC minicomputer - Sun: Workstations, 680x0 based and later SPARC based, and servers. Initially BSD based, later SVR4 based. - Workstations from HP, Tektronix, NBI, others I've probably forgotten, 3B2 and 3B1/Unix PC from AT&T... The list goes on and on and on. Things split roughly along BSD/System V lines, but code wasn't portable. Did you use bcopy() or memcpy()? index() or strchr()? There was lots of mixing and matching happening, too. There was a crying need for a standard. The mess is what begot GNU Autoconf, which made a difference at the time. Having the ANSI C standard also helped. HTH, Arnold