[oe] meta-python: outrageously long cython shebang with pyro

[Alexander Kanavin]

On 05/13/2017 09:34 AM, S. Lockwood-Childs wrote:
> The cython recipe builds fine -- this is runtime breakage from recipes that
> depend on cython. This was always a danger when using lengthy toplevel
> directory names (e.g. as tends to happen in jenkins auto-builds), but
> now I managed to get the dreaded "bad interpreter: No such file or directory"
> failure from cython despite a not-ridiculously-long toplevel path:
>
> #!/var/data/sjl/poky/build/tmp/work/armv7a-neon-oe-linux-gnueabi/libplist/git-r0/recipe-sysroot-native/usr/bin/python-native/python

We typically patch the upstream code to use

#!/usr/bin/env python

There is some PATH environment variable magic that will ensure that the 
correct version of python will come first in the PATH, so it should be 
safe to do. There's a ton of examples in oe-core.


Alex