updated cmake

CMakeLists.txt

@@ -12,11 +12,17 @@ include_directories(${PROJECT_SOURCE_DIR}/include)
 if (DEFINED ENET_STATIC)
     add_definitions(-DENET_IMPLEMENTATION)
     add_library(enet_static STATIC include/enet.h)
-    target_link_libraries(enet_static winmm ws2_32)
+
+    if (WIN32)
+        target_link_libraries(enet_static winmm ws2_32)
+    endif()
 endif()
 
 if (DEFINED ENET_SHARED)
     add_definitions(-DENET_IMPLEMENTATION -DENET_DLL)
     add_library(enet STATIC include/enet.h)
-    target_link_libraries(enet winmm ws2_32)
+
+    if (WIN32)
+        target_link_libraries(enet winmm ws2_32)
+    endif()
 endif()