Wrap CMAKE_SHARED_LIBRARY_CXX_FLAGS in quotes.

The variable is empty on some platforms (Windows), would cause issues.

src/CMakeLists.txt

@@ -164,7 +164,7 @@ add_library(Magnum ${SHARED_OR_STATIC}
     $<TARGET_OBJECTS:MagnumMathObjects>)
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(Magnum PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(Magnum PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 set(Magnum_LIBS
     ${CORRADE_UTILITY_LIBRARY}

src/DebugTools/CMakeLists.txt

@@ -50,7 +50,7 @@ set(MagnumDebugTools_HEADERS
 add_library(MagnumDebugTools ${SHARED_OR_STATIC} ${MagnumDebugTools_SRCS})
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(MagnumDebugTools PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(MagnumDebugTools PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 target_link_libraries(MagnumDebugTools
     Magnum

src/MeshTools/CMakeLists.txt

@@ -62,7 +62,7 @@ add_library(MagnumMeshTools ${SHARED_OR_STATIC}
     ${MagnumMeshTools_GracefulAssert_SRCS})
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(MagnumMeshTools PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(MagnumMeshTools PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 target_link_libraries(MagnumMeshTools Magnum)
 

src/Primitives/CMakeLists.txt

@@ -54,7 +54,7 @@ set(MagnumPrimitives_HEADERS
 add_library(MagnumPrimitives ${SHARED_OR_STATIC} ${MagnumPrimitives_SRCS})
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(Magnum PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(Magnum PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 target_link_libraries(MagnumPrimitives Magnum)
 

src/Shaders/CMakeLists.txt

@@ -52,7 +52,7 @@ endif()
 add_library(MagnumShaders ${SHARED_OR_STATIC} ${MagnumShaders_SRCS})
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(MagnumShaders PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(MagnumShaders PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 target_link_libraries(MagnumShaders Magnum)
 

src/Shapes/CMakeLists.txt

@@ -60,7 +60,7 @@ set(MagnumShapes_HEADERS
 add_library(MagnumShapes ${SHARED_OR_STATIC} ${MagnumShapes_SRCS})
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(MagnumShapes PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(MagnumShapes PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 target_link_libraries(MagnumShapes Magnum MagnumSceneGraph)
 

src/Text/CMakeLists.txt

@@ -41,7 +41,7 @@ set(MagnumText_HEADERS
 add_library(MagnumText ${SHARED_OR_STATIC} ${MagnumText_SRCS})
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(MagnumText PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(MagnumText PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 target_link_libraries(MagnumText Magnum MagnumTextureTools)
 

src/TextureTools/CMakeLists.txt

@@ -42,7 +42,7 @@ endif()
 add_library(MagnumTextureTools ${SHARED_OR_STATIC} ${MagnumTextureTools_SRCS})
 if(BUILD_STATIC_PIC)
     # TODO: CMake 2.8.9 has this as POSITION_INDEPENDENT_CODE property
-    set_target_properties(MagnumTextureTools PROPERTIES COMPILE_FLAGS ${CMAKE_SHARED_LIBRARY_CXX_FLAGS})
+    set_target_properties(MagnumTextureTools PROPERTIES COMPILE_FLAGS "${CMAKE_SHARED_LIBRARY_CXX_FLAGS}")
 endif()
 target_link_libraries(MagnumTextureTools Magnum)