[LLVMdev] clang/lnt buildbot on F20 "lnt: error: no such option: -m" ...

[Will Schmidt]

Hi
 Since the buildbot host was updated to Fedora F20 levels, the clang
buildbot has been failing with the following:

$ /home/clangbuild/clang-ppc64-1/lnt.venv/bin/lnt runtest --verbose --submit http://llvm.org/perf/submitRun --commit=1 nt --sandbox nt --no-timestamp --cc /home/clangbuild/clang-ppc64-1/llvm.install.1/bin/clang --cxx /home/clangbuild/clang-ppc64-1/llvm.install.1/bin/clang++ --without-llvm --test-suite /home/clangbuild/clang-ppc64-1/test-suite --no-machdep-info chinook-clangslave1__O3-plain --multisample=3 -mcpu=native
main.py:147: warning: --commit should be passed directly to the test suite.
main.py:147: warning: --verbose should be passed directly to the test suite.
main.py:147: warning: --submit should be passed directly to the test suite.
Usage: lnt runtest nt [options] tester-name
....
lnt: error: no such option: -m

I have removed the clang-ppc64-1 subdirectory, and the buildbot has
entirely recreated and refreshed it's contents.    I'm wondering if
there is a python version or other incompatibility that has been
introduced here, but it's not obvious to me.

Any suggestions on how to (easily?) identify the issue?
Host is currently running python-2.7.5-9.fc20,
python-virtualenv-1.10.1-1.

Thanks, 
-Will