Osx compatibility

src/glow/common/file_utils.cc

@@ -29,6 +29,10 @@ int64_t glow::util::fileModificationTime(std::string const& filename)
 {
     struct stat attr;
     stat(filename.c_str(), &attr);
+#ifdef __APPLE__
+    return attr.st_ctimespec.tv_sec * (int64_t)1000000000 + attr.st_ctimespec.tv_nsec;
+#else
     return attr.st_ctim.tv_sec * (int64_t)1000000000 + attr.st_ctim.tv_nsec;
+#endif
 }
 #endif