Travis ci

> > +    PYTHRAN_CXX_FLAGS = ['-O0', '-Wall', '-Wno-unknown-pragmas']
> Hum, not sure I understand. When you use py.test to test pythran using travis
> CI. You will test everything using test env which will set these value instead
> of the one in the pythranrc no? The pythranrc configuration is done later and
> these flags are removed?

!
You made double check :-) Fortunately, these are extra flags that do not
override the flags from pythranrc, see compile_cxxfile in toolchain.py