I have fond memories of threatining the Sun sales sloths with death and worse if they didn't at least ship .h files after they unbundled the C compiler. Sun is as responsible for GCC as the AT&T lawyers are responsible for Linux.
Ignoring the lawyers, gcc out-ran all of the Sun compilers for years. It wasn't until ~2001 when I saw demonstrable proof that the Sun compilers were ready to outrun the GNU bloatationiousness. But meanwhile, Sun's hubris lead to others not only unbundling, but actually spending that money on compiler design! I still love the mipsco compilers that quote chapter and verse of the ANSI spec. And they worked even before DEC got MIPSed. Oh wait, that was the *other* DEC CPU. (6,7,8,10,VAX,MIPS,???) Still, the compiler worked across all of them.
