Status and rationale for toplevel bootstrap (was Re: Example of debugging GCC with toplevel bootstrap)

[DJ Delorie]

> No it isn't. The results should still be the same.

You aren't considering call ABI or PIC issues.  Natives might have
different call-saved registers, or global fixed register (like the TLS
pointers), that affect optimization in different ways than an embedded
(no tls, different pic, different ABI) compile would.

Consider, for example, DJGPP vs Win32.  They're both essentially
i386-COFF targets, but the resulting code is quite different.