Fix destructor handling in CDataType for python 3/Capsules.
Some crash fix and skip some tests when g++ isn't available.
Better commit
Fuse less elemwise when no compiler is available. (fix test crash in that case)
Skip cudnn test when the GPU is too old.
Don't try to compile if no compiler
remove import not used anymore.
We exclude 32 as a number of input for Elemwise.perform.
Skip a test that can't run without a compiler.
Be more robust in case the lazylinker_c.c isn't present.
Merge pull request #2129 from abergeron/fix_cdata_py3

Fix destructor handling in CDataType for python 3/Capsules.
Don't try to compile scan cython code if no compiler. More robust if the c file isn't available.
better error msg
[CRASH]Fix indentation error introduced in the previous commit.
Disable g++ not present warning if the user set cxx=

fix gh-2138
Merge pull request #2128 from nouiz/nogcc

[MRG, ENH]Some crash/warning fix and skip some tests when g++ isn't available.