Build error with protobuf branch 3.10.x about graph-learn HOT 3 CLOSED

I have fix the compile error with the solution following, but I don't know why the two line result to the compile error, anyone know why? thanks.

diff --git a/src/google/protobuf/text_format.cc b/src/google/protobuf/text_format.cc
index 8fc197a..be8231d 100644
--- a/src/google/protobuf/text_format.cc
+++ b/src/google/protobuf/text_format.cc
@@ -35,7 +35,7 @@
 #include <google/protobuf/text_format.h>

 #include <float.h>
-#include <math.h>
+#include <cmath>
 #include <stdio.h>

 #include <algorithm>

or update deps https://github.com/protocolbuffers/protobuf/tree/3.11.x

from graph-learn.

Your OS and g++ version? It seems some error with your environment. Try to just build protobuf from source code may be a help.

from graph-learn.

My OS is ubuntu 16.04 and g++ version is 5.4. The g++ version is build from source and In my system installed g++-4.9 & g++-5.5 concurrently. I think the problem may result from complex compiler envirnment. The problem isn't exist in a pure ubuntu16.04 with gcc 5.4 envirnment. Thanks.

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