$PATH and buildworld not getting along

[Ulrich Spörlein]

On Tue, 15.02.2011 at 21:10:29 +0000, Alexander Best wrote:
> hi there,
> 
> i've run into an issue where $PATH doesn't get discarded during buildworld. is
> this behavior to be expected? to reproduce do:
> 
> 1) be sure /usr/local/bin comes *before* /usr/bin in your $PATH
> 2) ln -s /bin/cat /usr/local/bin/cc (some sh script would be better)
> 3) cd /usr/src ; make SRCCONF=/dev/null __MAKE_CONF=/dev/null buildworld
> 4) see how buildworld fails, because cat(1) gets invoked instead of cc(1).
> 
> ... buildkernel on the other hand seems to be immune to such an issue.

The bootstrap stage needs *some* compiler on the host system to build
the (cross)compiler that is then used during the rest of buildworld (and
all of buildkernel). If you remove cc or c++ or libstdc++.so then you're
screwed.

As to whether the user's PATH should be honored for building the
bootstrap/cross/build-tools, I'd say yes.

If, however, the breakage is during the actual build-everything stage,
that would be a problem indeed.

Regards,
Uli