Disabling bootstrap

[Zdenek Dvorak]

Hello,

> I've changed gcc by adding a new pass, however, when I compile gcc,
> during compilation it calls itself, so I disabled bootstrap but that
> is still happening even during bootstrap. Is there any way to compile
> gcc without the final gcc compiling something?

make stage1-bubble.  See also
http://gcc.gnu.org/wiki/Top-Level_Bootstrap

> Moreover, how can I add a flag to gcc so that it enables/disables a given 
> pass?

Add the flag to common.opt, and test it in the gate function of your
pass.

Zdenek