What steps will reproduce the problem?
assimp/code/DefaultIOSystem.cpp: In function ‘void MakeAbsolutePath(const char*, char*)’:
/assimp/code/DefaultIOSystem.cpp:136:8: error: ‘::_fullpath’ has not been declared
/assimp/code/DefaultIOSystem.o] Error 1
What is the expected output? build success
What do you see instead? build error
Assimp was building perfectly with previous version of Assimp. Perhaps a IFDEF CYGWIN could resolve the issue.