Elizabeth Fischer 3352889d73 py-pil: Protect against building with Python3. (#1868) ... * py-pil: Does not build with Python3. * Set py-pillow to be the default pil provider * Update package.py * Change to comments requested by adamjstewart * Remove version constraint from extends(), avoid a Spack bug.		2016-09-28 16:51:41 -04:00
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spack/defaults	py-pil: Protect against building with Python3. (#1868)	2016-09-28 16:51:41 -04:00