Clearly history is wrong. It would never be able to compile C in less than 18MB (1/2 of clang’s text size). Therefor Unix didn’t really happen. It’s all been a phone company conspiracy for world domination, like the NASA  not really putting a man on the moon. We were just *told* they had built a system in 1973 using a simple two pass compiler that would fit into about 28KW of memory. AT&T would have gotten away with it too, if it weren’t for their great  mistake—the 3B20. Results: no more “One system; it works."

On Nov 26, 2015, at 6:21 PM, Charles Forsyth <charles.forsyth@gmail.com> wrote:


On 26 November 2015 at 23:08, Ryan Gonzalez <rymg19@gmail.com> wrote:
Holy crap, that's crazy. I built it in debug mode on Linux, but I don't think it used that much. I only have 6 GB right now!

You have to remember that a C compiler is one of the largest, most complex software components that human beings have ever had to produce.
The original C reference manual made it look deceptively easy, but really there's a ton of stuff going on in there, as you can see.
How they ever got it going on a system with 64Kbytes of address space, I'll never know.