Don't link unneeded libraries in commands.

src/Magnum/Platform/CMakeLists.txt

@@ -239,8 +239,7 @@ if(WITH_MAGNUMINFO)
     elseif(CORRADE_TARGET_WINDOWS)
         target_link_libraries(magnum-info MagnumWindowlessWglApplication)
     elseif(APPLE)
-        find_library(OpenGL_LIBRARY OpenGL)
-        target_link_libraries(magnum-info MagnumWindowlessCglApplication ${OpenGL_LIBRARY})
+        target_link_libraries(magnum-info MagnumWindowlessCglApplication)
     else()
         message(FATAL_ERROR "magnum-info is not available on this platform. Set WITH_MAGNUMINFO to OFF to skip building it.")
     endif()

src/Magnum/Text/CMakeLists.txt

@@ -68,8 +68,7 @@ if(WITH_FONTCONVERTER)
     add_executable(magnum-fontconverter fontconverter.cpp)
 
     if(APPLE)
-        find_library(OpenGL_LIBRARY OpenGL)
-        target_link_libraries(magnum-fontconverter MagnumText Magnum MagnumWindowlessCglApplication ${OpenGL_LIBRARY})
+        target_link_libraries(magnum-fontconverter MagnumText Magnum MagnumWindowlessCglApplication)
     elseif(UNIX AND NOT TARGET_GLES)
         target_link_libraries(magnum-fontconverter MagnumText Magnum MagnumWindowlessGlxApplication ${X11_LIBRARIES})
     elseif(WIN32)

src/Magnum/TextureTools/CMakeLists.txt

@@ -57,8 +57,7 @@ if(WITH_DISTANCEFIELDCONVERTER)
     add_executable(magnum-distancefieldconverter distancefieldconverter.cpp)
 
     if(APPLE)
-        find_library(OpenGL_LIBRARY OpenGL)
-        target_link_libraries(magnum-distancefieldconverter MagnumTextureTools MagnumWindowlessCglApplication Magnum ${OpenGL_LIBRARIES})
+        target_link_libraries(magnum-distancefieldconverter MagnumTextureTools MagnumWindowlessCglApplication Magnum)
     elseif(UNIX AND NOT TARGET_GLES)
         target_link_libraries(magnum-distancefieldconverter MagnumTextureTools Magnum MagnumWindowlessGlxApplication ${X11_LIBRARIES})
     elseif(WIN32)