Error Cannot open include file: 'GLES2/gl2.h': No such file or directory suddenly appears

Question

I've compiled my project many times over, both in release and debug configuration. Suddenly, an error appears:

Cannot open include file: 'GLES2/gl2.h': No such file or directory

This is a Qt project in Visual Studio 2017 Community with the Qt add-in, using Qt 5.6.1-64.

I tried to search on google but there seems to be no advice that applies to this issue.

Answer 1

I suffering the same problem. solved by adding this Include :

$(QTDIR)\include\QtANGLE

I found this solution by notice that project created by Qt Creator can be build without error. And find this include in qmake generated Makefile.