message: cmake: link OpenGL
diff: @@ -3,6 +3,8 @@ if(NOT NASTY_OPENSSL_WORKAROUND)
  find_package(OpenSSL REQUIRED)
  endif()
  +find_package(OpenGL REQUIRED)
  +
  set(IRRLICHT_SRCS_COMMON
  # Mesh loaders
  C3DSMeshFileLoader.cpp
  @@ -339,6 +341,8 @@ add_library(Irrlicht STATIC
  $<TARGET_OBJECTS:libshaderc>
  )
  +target_link_libraries(Irrlicht INTERFACE ${OPENGL_gl_LIBRARY})
  +
  target_include_directories(Irrlicht PUBLIC
  ../../include
  ${COMMON_INCLUDE_DIRS}
  