OpenGL: undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
## undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
```sh
/usr/bin/ld: CMakeFiles/example.dir/glad.c.o: undefined reference to symbol 'dlclose@@GLIBC_2.2.5'
//lib/x86_64-linux-gnu/libdl.so.2: error adding symbols: DSO missing from command line
collect2: error: ld returned 1 exit status
CMakeFiles/example.dir/build.make:124: recipe for target 'example' failed
make[2]: *** [example] Error 1
CMakeFiles/Makefile2:67: recipe for target 'CMakeFiles/example.dir/all' failed
make[1]: *** [CMakeFiles/example.dir/all] Error 2
Makefile:83: recipe for target 'all' failed
make: *** [all] Error 2
```
## Solution:
Add ${CMAKE_DL_LIBS}
```sh
target_link_libraries(gltuto PUBLIC glfw OpenGL::GL ${CMAKE_DL_LIBS})
```
## Reference:
- https://stackoverflow.com/questions/56841870/how-to-fix-undefined-reference-to-symbol-dlcloseglibc-2-2-5-from-glad-c
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