port jinja to install on cygwin

[williamstein]

Right now the jinja spkg segfaults when being installed on cygwin.

Component: porting: Cygwin

Issue created by migration from https://trac.sagemath.org/ticket/7282

[williamstein]

comment:1

NOTE: I discovered that if I comment out the lines

#from hashlib import sha1
#try:
    #from hashlib import sha1
    #raise ImportError
#except ImportError:
#    from sha import new as sha1

in jinja/loaders.py then python setup.py build doesn't segfault, though
installing does. However, I can copy the build/lib*/jinja directory over to
site-packages by hand and it seems to work.

Similar remarks apply to Sphinx.

[mwhansen]

comment:2

We really should try to make sure that there are no problems with hashlib since it's a very common module.

[mwhansen]

comment:3

The problem occurs somewhere with the optional speedups extension. We can (temporarily) work around this by doing

python setup.py --without-speedups install

on Cygwin.

[mwhansen]

comment:4

Also, once jinja2 is installed as above, Sphinx installs without a problem.

[mwhansen]

comment:5

This currently builds fine with Cygwin 1.7