>> 2) compiling with '.' or '::' in your path will cause the host tools
>>    (toolchain) to fail, since the host gcc invokes the cross-gas in
>>    the object directory as the host assembler.

> Only if it's at the front of your path or before your system dirs
> (ala /usr/bin, /bin, etc).  That's gonna break much much more than
> just your toolchain build long run.

Like what?  I have a machine or two on which I run that way routinely,
and haven't noticed any particular breakage.  (To be sure, I reset my
path before doing any in-tree builds, but when I forget it usually runs
fine until it trips over <md5.h>, which is to be expected.)

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