Cmake GLEW linking

[ToppDev]

Hello,

your current develop branch was not linking correctly under Arch Linux.

I got errors like this

/usr/bin/ld: ../application/libapplication.a(imgui_impl_opengl3.cpp.o): warning: relocation against `__glewGetUniformLocation' in read-only section `.text'
/usr/bin/ld: ../application/libapplication.a(renderer_ogl3.cpp.o): in function `RendererOpenGL3::Create(Platform&)':
renderer_ogl3.cpp:(.text+0x7f): undefined reference to `glewInit'
/usr/bin/ld: ../application/libapplication.a(imgui_impl_opengl3.cpp.o): in function `ImGui_ImplOpenGL3_SetupRenderState(ImDrawData*, int, int, unsigned int)':
imgui_impl_opengl3.cpp:(.text+0x1a0): undefined reference to `__glewBlendEquation'
/usr/bin/ld: imgui_impl_opengl3.cpp:(.text+0x378): undefined reference to `__glewUseProgram'
/usr/bin/ld: imgui_impl_opengl3.cpp:(.text+0x389): undefined reference to `__glewUniform1i'
...

To fix this, I had to link glew to the application library.

[ToppDev]

As the checks here fail there is a interesting thing happening. On Ubuntu, you don't need glew, therefore it is also not in your travis scripts. But on my Arch Linux I need it.

Would you prefer adding apt install libglew-dev to your travis files or is there another solution to this problem?

[thedmd]

Linking is failing, because GLEW is installed on your system. Is that correct?
I will probably just disable extension loading as examples does not need that.

[thedmd]

Your issue is addressed in a8b1be2.
Please confirm that examples are linking fine now. If not, please report new issue.
Thanks!

[ToppDev]

just checked it. Works now without problems

Thank you for solving 👍