From dfb9832a25e8d1852e158bbcead941d3a5941343 Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.a.alekhin@gmail.com>
Date: Mon, 15 Apr 2019 22:28:33 +0000
Subject: [PATCH] cmake(protobuf): ensure using of own headers

---
 3rdparty/protobuf/CMakeLists.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/3rdparty/protobuf/CMakeLists.txt b/3rdparty/protobuf/CMakeLists.txt
index ada9891a7b..7e0ea7df70 100644
--- a/3rdparty/protobuf/CMakeLists.txt
+++ b/3rdparty/protobuf/CMakeLists.txt
@@ -139,6 +139,7 @@ append_if_exist(Protobuf_SRCS
   ${PROTOBUF_ROOT}/src/google/protobuf/wrappers.pb.cc
 )
 
+include_directories(BEFORE "${PROTOBUF_ROOT}/src")  # ensure using if own headers: https://github.com/opencv/opencv/issues/13328
 add_library(libprotobuf STATIC ${Protobuf_SRCS})
 target_include_directories(libprotobuf SYSTEM PUBLIC $<BUILD_INTERFACE:${PROTOBUF_ROOT}/src>)
 set_target_properties(libprotobuf