Qt creator Adding external library (still: Cannot open include file: 'GL/glew.h')

Question

I followed the instruction:

1. In the Projects pane, open the project file (.pro).
2. Right-click in the code editor to open the context menu and select Add

Answer 1

1. Open .pro file with Editor
2. Add directory of library in INCLUDEPATH += section

 Append ` \` at the end of library path 

3. Go to Build > Run qmake

4. Check if library has been included .

Answer 2

Check if the desired files really exist under D:/OpenGL/glew-1.5.4/include. I.e. is there a folder named GL and inside it a file named glew.h?

Then try to remove the $$PWD/ part from the paths.

If this doesn't help replace the generated lines with just those two lines:

LIBS += -L$$quote(D:/OpenGL/glew-1.5.4/lib/) -lglew32
INCLUDEPATH += $$quote(D:/OpenGL/glew-1.5.4/include)

Answer 3

INCLUDEPATH += D:/OpenGL/glew-1.5.4/include
LIBS += -Lc:D:/OpenGL/glew-1.5.4/lib -lname

Just add the above line in the .pro file.Then check it.

Answer 4

I had the same problem and I figured it out just now: You have to run qmake(build->run qmake) to validate changes in the pro file.