Env:

• protobuf version is 3.5.1
• Native build command is nmake
• cmake version is 3.10
• Unreal Engine 4 version is 4.18

1. open Native Tools Command Prompt command, eg. x64 Native Tools Command Prompt for VS 2017.

2. Address to directory build_protobuf-lite/ (address to directory build_protobuf/ if you want to build libprotobuf):

   cd build_protobuf-lite

mkdir build & cd build

mkdir release & cd release

cmake -G "NMake Makefiles" -DCMAKE_BUILD_TYPE=Release ../..

nmake

then libprotobuf-lite.lib would output to directory install/Release/.

protobuf source has been modified, because protobuf 3.x offical source cann't build with UE4. source modify details: https://github.com/jashking/UE4Protobuf

1. Address to directory test/:

   cd test

2. execute protoc_gen.bat

then test.pb.h and test.pb.cc would output in directory test/

1. Address to directory test/cmake/:

   cd test/cmake/

mkdir build & cd build

mkdir release & cd release

cmake -G "NMake Makefiles" -DCMAKE_BUILD_TYPE=Release ../..

nmake

then libtest.lib would output to directory test/install/Release/

1. copy ue4/MyProj.Build.cs into your UE4 project: MyProj/Source/MyProj/

2. copy libtest.lib and libprotobuf-lite.lib into your UE4 project: MyProj/ThirdParty/Protobuf/Library/

3. copy google protobuf headers into your UE4 project: MyProj/ThirdParty/Protobuf/Include/

4. copy test.pb.h into your UE4 project: MyProj/ThirdParty/Protobuf/Include/

5. Add bEnableExceptions = true; inside the {ProjectName}.Build.cs constructor.

then your can build your UE4 project with protoc C++ files.

1. execute \ndk_build\build.bat

2. execute test\ndk_build\build.bat

3. copy ndk_build\obj\local\armeabi-v7a\libprotobuf-lite-ndk.a and test\ndk_build\obj\local\armeabi-v7a\libtest-ndk.a into your UE4 project: MyProj/ThirdParty/Protobuf/Library/

4. copy headers which are in test\src\ into your UE4 project: MyProj/ThirdParty/Protobuf/Include/

5. build your UE4 project.

libprotobuf-lite:
https://github.com/protocolbuffers/protobuf/blob/master/cmake/libprotobuf-lite.cmake

libprotobuf:
https://github.com/protocolbuffers/protobuf/blob/master/cmake/libprotobuf.cmake