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Add implementation of build for protobuf>=22.0 on Windows #5359

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Mar 4, 2024
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Add implementation of build for protobuf>=22.0 on Windows #5359

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39 changes: 38 additions & 1 deletion docs/how-to-build/how-to-build.md
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Original file line number Diff line number Diff line change
Expand Up @@ -180,7 +180,7 @@ cmake --build . --config Release --target install
```
(optional) Download and install Vulkan SDK from https://vulkan.lunarg.com/sdk/home

Build ncnn library (replace <protobuf-root-dir> with a proper path):
Build ncnn library (replace `<protobuf-root-dir>` with a proper path):

```shell
cd <ncnn-root-dir>
Expand All @@ -193,6 +193,43 @@ cmake --build . --config Release --target install

Note: To speed up compilation process on multi core machines, configuring `cmake` to use `jom` or `ninja` using `-G` flag is recommended.

Note: For protobuf >=22.0 (Take v25.3 for example):

Build zlib:
```shell
git clone -b -v1.3.1 https://github.com/madler/zlib.git
cd zlib
mkdir build
cd build
cmake -A x64 -DCMAKE_INSTALL_PREFIX=%cd%/install ..
cmake --build . --config Release -j 2
cmake --build . --config Release --target install
```

Build protobuf library (replace `<zlib-root-dir>` with a proper path):
```shell
git clone -b v25.3 https://github.com/protocolbuffers/protobuf.git
cd protobuf
git submodule update --init --recursive

mkdir protobuf_build
cd protobuf_build
cmake -A x64 -DCMAKE_INSTALL_PREFIX=%cd%/install -DCMAKE_CXX_STANDARD=14 -Dprotobuf_BUILD_TESTS=OFF -Dprotobuf_MSVC_STATIC_RUNTIME=OFF -DZLIB_INCLUDE_DIR=<zlib-root-dir>\build\install\include -DZLIB_LIBRARY=<zlib-root-dir>\build\install\lib\zlib.lib -DABSL_PROPAGATE_CXX_STD=ON ../cmake
cmake --build . --config Release -j 2
cmake --build . --config Release --target install
```

Build ncnn library (replace `<zlib-root-dir>` and `<protobuf-root-dir>` with a proper path):

```shell
cd <ncnn-root-dir>
mkdir -p build
cd build
cmake -A x64 -DCMAKE_INSTALL_PREFIX=%cd%/install -DCMAKE_PREFIX_PATH=<protobuf-root-dir>/protobuf_build\install\cmake -DZLIB_INCLUDE_DIR=<zlib-root-dir>\build\install\include -DZLIB_LIBRARY=<zlib-root-dir>\build\install\lib\zlib.lib -Dabsl_DIR=<protobuf-root-dir>/protobuf_build\install\lib\cmake\absl -Dutf8_range_DIR=<protobuf-root-dir>/protobuf_build\install\lib\cmake\utf8_range -DNCNN_VULKAN=ON ..
cmake --build . --config Release -j 2
cmake --build . --config Release --target install
```

***
### Build for macOS

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