W10 + Cygwin-3.0.7 + Gfortran

[rih5342]

I'm aware of that page thank you. 

However, I don't find a useful link where I can post a question.

I don't understand the mailing list,  which is why (right now) I am asking
on nabble. 



I've tried building ISL  V19, V20, and V21, all with the same result. 

-------------------------------------------------------------------------------
checking how to run the C++ preprocessor... /lib/cpp
configure: error: in `/___packages/isl/isl-0.21-build':
configure: error: C++ preprocessor "/lib/cpp" fails sanity check
-------------------------------------------------------------------------------
| 		     Syntax error
configure:14718: /lib/cpp  conftest.cpp
cpp: error: spawn: No such file or directory
-------------------------------------------------------------------------------

 
configure is trying to make directory cpp, when there is already an
executable cpp in that directory.

Thank you.



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