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-rw-r--r--src/google/protobuf/util/field_comparator_test.cc7
1 files changed, 6 insertions, 1 deletions
diff --git a/src/google/protobuf/util/field_comparator_test.cc b/src/google/protobuf/util/field_comparator_test.cc
index d3d34602..23f7d51d 100644
--- a/src/google/protobuf/util/field_comparator_test.cc
+++ b/src/google/protobuf/util/field_comparator_test.cc
@@ -35,7 +35,12 @@
#include <google/protobuf/unittest.pb.h>
#include <google/protobuf/descriptor.h>
#include <google/protobuf/stubs/mathutil.h>
-
+// This gtest header is put after mathutil.h intentionally. We have to do
+// this because mathutil.h includes mathlimits.h which requires cmath not
+// being included to compile on some versions of gcc:
+// https://github.com/google/protobuf/blob/818c5eee08840355d70d2f3bdf1a2f17986a5e70/src/google/protobuf/stubs/mathlimits.h#L48
+// and the opensource version gtest.h header includes cmath transitively
+// somehow.
#include <gtest/gtest.h>
namespace google {