Update CONTRIBUTING.md

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Soumith Chintala 2017-04-18 15:39:58 -04:00 committed by GitHub
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@ -70,6 +70,8 @@ For example:
You do not need to repeatedly install after modifying python files.
#### C++ Development tips
When you are developing on the C++ side of things, the environment variables `DEBUG` and `NOCUDA` are helpful.
- `DEBUG=1` will enable debug builds (-g -O0)