ml-agents-grpc/INSTALL.md

If you are in a hurry

For language-specific installation instructions for gRPC runtime, please refer to these documents

• C++: Currently to install gRPC for C++, you need to build from source as described below.
• C#: NuGet package Grpc
• Go: go get google.golang.org/grpc
• Java
• Node: npm install grpc
• Objective-C
• PHP: pecl install grpc
• Python: pip install grpcio
• Ruby: gem install grpc

Pre-requisites

Linux

 $ [sudo] apt-get install build-essential autoconf libtool pkg-config

If you plan to build from source and run tests, install the following as well:

 $ [sudo] apt-get install libgflags-dev libgtest-dev
 $ [sudo] apt-get install clang libc++-dev

macOS

On a Mac, you will first need to install Xcode or Command Line Tools for Xcode and then run the following command from a terminal:

 $ [sudo] xcode-select --install

To build gRPC from source, you may also need to install the following packages, which you can get from Homebrew:

 $ brew install autoconf automake libtool shtool

If you plan to build from source and run tests, install the following as well:

 $ brew install gflags

Tip: when building, you may want to explicitly set the LIBTOOL and LIBTOOLIZE environment variables when running make to ensure the version installed by brew is being used:

 $ LIBTOOL=glibtool LIBTOOLIZE=glibtoolize make

Protoc

By default gRPC uses protocol buffers, you will need the protoc compiler to generate stub server and client code.

If you compile gRPC from source, as described below, the Makefile will automatically try and compile the protoc in third_party if you cloned the repository recursively and it detects that you don't already have it installed.

If it hasn't been installed, you can run the following commands to install it.

$ cd grpc/third_party/protobuf
$ sudo make install   # 'make' should have been run by core grpc

Build from Source

For developers who are interested to contribute, here is how to compile the gRPC C Core library.

 $ git clone -b $(curl -L https://grpc.io/release) https://github.com/grpc/grpc
 $ cd grpc
 $ git submodule update --init
 $ make
 $ [sudo] make install

Windows

There are several ways to build under Windows, of varying complexity depending on experience with the tools involved.

Building using CMake (RECOMMENDED)

Builds gRPC C and C++ with boringssl.

• Install Visual Studio 2015 or 2017 (Visual C++ compiler will be used).
• Install Git.
• Install CMake.
• Install Active State Perl (choco install activeperl) - required by boringssl
• Install Go (choco install golang) - required by boringssl
• Install yasm and add it to PATH (choco install yasm) - required by boringssl
• (Optional) Install Ninja (choco install ninja)

Clone grpc sources including submodules

Before building, you need to clone the gRPC github repository and download submodules containing source code for gRPC's dependencies (that's done by the submodule command).

> @rem You can also do just "git clone --recursive -b THE_BRANCH_YOU_WANT https://github.com/grpc/grpc"
> powershell git clone --recursive -b ((New-Object System.Net.WebClient).DownloadString(\"https://grpc.io/release\").Trim()) https://github.com/grpc/grpc
> cd grpc
> @rem To update submodules at later time, run "git submodule update --init"

cmake: Using Visual Studio 2015 or 2017 (can only build with OPENSSL_NO_ASM).

When using the "Visual Studio" generator, cmake will generate a solution (grpc.sln) that contains a VS project for every target defined in CMakeLists.txt (+ few extra convenience projects added automatically by cmake). After opening the solution with Visual Studio you will be able to browse and build the code as usual.

> @rem Run from grpc directory after cloning the repo with --recursive or updating submodules.
> md .build
> cd .build
> cmake .. -G "Visual Studio 14 2015" -DCMAKE_BUILD_TYPE=Release
> cmake --build .

cmake: Using Ninja (faster build, supports boringssl's assembly optimizations).

Please note that when using Ninja, you'll still need Visual C++ (part of Visual Studio) installed to be able to compile the C/C++ sources.

> @rem Run from grpc directory after cloning the repo with --recursive or updating submodules.
> md .build
> cd .build
> call "%VS140COMNTOOLS%..\..\VC\vcvarsall.bat" x64
> cmake .. -GNinja -DCMAKE_BUILD_TYPE=Release
> cmake --build .
> ninja

msys2 (with mingw)

The Makefile (and source code) should support msys2's mingw32 and mingw64 compilers. Building with msys2's native compiler is also possible, but difficult.

This approach requires having msys2 installed.

# Install prerequisites
MSYS2$ pacman -S autoconf automake gcc libtool mingw-w64-x86_64-toolchain perl pkg-config zlib
MSYS2$ pacman -S mingw-w64-x86_64-gflags

# From mingw shell
MINGW64$ export CPPFLAGS="-D_WIN32_WINNT=0x0600"
MINGW64$ make

NOTE: While most of the make targets are buildable under Mingw, some haven't been ported to Windows yet and may fail to build (mostly trying to include POSIX headers not available on Mingw).

Pre-generated Visual Studio solution (DELETED)

WARNING: This used to be the recommended way to build on Windows, but because of significant limitations (hard to build dependencies including boringssl, .proto codegen is hard to support, ..) we are no longer providing them. Use cmake to build on Windows instead.