Don't dump rocksdb version on IOS

Author: igorcanadi

db/db_impl.cc

@@ -4690,9 +4690,12 @@ Status DestroyDB(const std::string& dbname, const Options& options) {
 //
 // A global method that can dump out the build version
 void DumpLeveldbBuildVersion(Logger * log) {
+#if !defined(IOS_CROSS_COMPILE)
+  // if we compile with Xcode, we don't run build_detect_vesion, so we don't generate util/build_version.cc
   Log(log, "Git sha %s", rocksdb_build_git_sha);
   Log(log, "Compile time %s %s",
       rocksdb_build_compile_time, rocksdb_build_compile_date);
+#endif
 }
 
 }  // namespace rocksdb