You can have files with different rights anywhere on your system. One thing you can do is nuke that build folder then use chown and chmod on the content of your download folder and ensure that everything belongs to the correct user and with read/write properties.

Having the same problem with a cross-compilation using the linary toolchain (aarch64-linux-gnu-) v6.2.1

error: 'EGLNativePixmapType' has not been declared

Did you manage to find what the problem was?

@mvuori yes i did check these solutions but i have no idea about these compiler directives. How do i use them in QtCreator. And it throws error for only one project and my other projects are working fine.

Doens't work, I am done with that :(