/usr/src/castle-game-engine-4.1.1/opengl/ is in castle-game-engine-src 4.1.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/src/castle-game-engine-4.1.1/opengl/castlecurves.pas
/usr/src/castle-game-engine-4.1.1/opengl/castleglbitmapfonts.pas
/usr/src/castle-game-engine-4.1.1/opengl/castleglcubemaps.pas
/usr/src/castle-game-engine-4.1.1/opengl/castleglimages.pas
/usr/src/castle-game-engine-4.1.1/opengl/castlegloutlinefonts.pas
/usr/src/castle-game-engine-4.1.1/opengl/castleglshaders.pas
/usr/src/castle-game-engine-4.1.1/opengl/castleglshadowvolumes.pas
/usr/src/castle-game-engine-4.1.1/opengl/castleglutils.pas
/usr/src/castle-game-engine-4.1.1/opengl/castleglversion.pas
/usr/src/castle-game-engine-4.1.1/opengl/openglmac.inc
/usr/src/castle-game-engine-4.1.1/opengl/windows/
/usr/src/castle-game-engine-4.1.1/opengl/windows/castleglwindowsfonts.pas
/usr/src/castle-game-engine-4.1.1/opengl/windows/castleglwindowsfonts_implement.inc