cmake doesn't link libGLU using QtOpenGL

Question

I'm trying to compile a software that uses QtOpenGL, but I got a link error because -lGLU is not present. cmake is used. The only relevant line in CMakeLists.txt files seems to me find_package(Qt4 REQUIRED)

The system is Linux 64bit, Debian unstable, qt version 4.7.3, cmake version 2.8

score 4 · Answer 1 · answered Jul 25 '11 at 22:05

GLU is neither part of OpenGL nor Qt. You must add it as an additional dependency manually; the CMake FindOpenGL module also searches for GLU

% cmake --help-module FindOpenGL
cmake version 2.8.1
  FindOpenGL
       Try to find OpenGL

       Once done this will define


         OPENGL_FOUND        - system has OpenGL
         OPENGL_XMESA_FOUND  - system has XMESA
         OPENGL_GLU_FOUND    - system has GLU
         OPENGL_INCLUDE_DIR  - the GL include directory
         OPENGL_LIBRARIES    - Link these to use OpenGL and GLU


       If you want to use just GL you can use these values

         OPENGL_gl_LIBRARY   - Path to OpenGL Library
         OPENGL_glu_LIBRARY  - Path to GLU Library


       On OSX default to using the framework version of opengl

People will have to change the cache values of OPENGL_glu_LIBRARY and OPENGL_gl_LIBRARY to use OpenGL with X11 on OSX

       Defined in: /usr/share/cmake/Modules/FindOpenGL.cmake

score 3 · Answer 2 · edited Jul 17 '12 at 00:34

3

I solved it this way:

target_link_libraries(MyProgram ${QT_LIBRARIES} GL GLU glut)

edited Jul 17 '12 at 00:34

Anthony

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answered Apr 10 '12 at 12:48

linello

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This is not a good CMake solution, though. Whether the GL, GLU and glut libraries are available won't be tested that way. – Alexis Wilke Apr 22 '18 at 00:57

score 2 · Answer 3 · answered Jul 25 '11 at 22:21

2

If you do set(QT_USE_QTOPENGL TRUE) then -lGLU is included in the linker options:

find_package(Qt4 REQUIRED)
set(QT_USE_QTOPENGL TRUE)
include(${QT_USE_FILE})
message("Libs: ${QT_LIBRARIES}")
add_executable(program main.cpp)
target_link_libraries(program ${QT_LIBRARIES})

answered Jul 25 '11 at 22:21

antonakos

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the following lines in CMakeLists.txt `find_package(Qt4 REQUIRED)` `set(QT_USE_QTXML 1)` `set(QT_USE_QTOPENGL 1)` `set(QT_USE_QT3SUPPORT 1)` `include(${QT_USE_FILE})` `message("Libs: ${QT_LIBRARIES}")` give `Libs: /usr/lib/libQt3Support.so;/usr/lib/libQtOpenGL.so;/usr/lib/libQtGui.so;/usr/lib/libQtXml.so;/usr/lib/libQtSql.so;/usr/lib/libQtNetwork.so;/usr/lib/libQtCore.so` – rebli Jul 25 '11 at 23:11
@rebli I don't think I can help any further then. The output of those lines on my system contains `-lGL` and `-lGLU`. I am also using cmake version 2.8. – antonakos Jul 26 '11 at 00:11

score 1 · Answer 4 · edited Apr 22 '18 at 00:56

1

I don't know if this is the right solution, but the build completes after I added these lines to CMakeLists.txt:

find_package(OpenGL)

and added

${OPENGL_LIBRARIES}

to

target_link_libraries

edited Apr 22 '18 at 00:56

Alexis Wilke

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answered Jul 26 '11 at 07:32

rebli

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cmake doesn't link libGLU using QtOpenGL

4 Answers4

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