compile on Mac OSX

src/storage/cpu_device_storage.h

@@ -38,7 +38,13 @@ class CPUDeviceStorage {
 }; // class CPUDeviceStorage
 
 inline void* CPUDeviceStorage::Alloc(size_t size) {
+#ifdef __APPLE__
+ return CHECK_NOTNULL(malloc(size));
+#elif _MSC_VER
+ return CHECK_NOTNULL(_aligned_malloc(size, alignment_));
+#else
  return CHECK_NOTNULL(memalign(alignment_, size));
+#endif
 }
 
 inline void CPUDeviceStorage::Free(void* ptr) { free(ptr); }