amd64 base/head r284673 fails to build on amd64 base/head r284639, pilot error?

[Jason Evans]

On Jun 21, 2015, at 1:05 PM, Garrett Cooper <yaneurabeya at gmail.com> wrote:
> On Jun 21, 2015, at 3:16, Trond Endrestøl <Trond.Endrestol at fagskolen.gjovik.no> wrote:
>> Am I the only one who fails to build recent base/head (r284673) on
>> pretty recent base/head (r284639)? This is on amd64 with ZFS and BEs.
> 
> ...
> 
>> CC=clang
>> CXX=clang++
>> CPP=clang-cpp
> 
> 	You need to remove these lines. They shouldn’t have been set before or after the commits from projects/bmake .

I hit the same build failure, and I don't have any of those lines in my /etc/make.conf.  Mine is:

 STRIP=

 # added by use.perl 2013-01-21 16:11:13
 PERL_VERSION=5.12.4
 WITH_PKGNG=yes

The STRIP= definition appears to have no impact with regard to the build failure.

I routinely do multiple buildworld/installworld cycles when updating, so I am pretty sure that this is a self bootstrap failure; buildworld/installworld succeeds the first time, but not the second time.  r283923 does not have the problem, so this was introduced sometime in the past three weeks.

Jason