GamePlay-deps

External dependencies for GamePlay 3D framework.

We are using CMake to create a single, consistent way of compiling all the libraries that GamePlay uses. CMake with toolchain files are used to support cross-compiling.

Host	Target Platform	Target Arch
MacOSX	macosx	x86_64
	ios	arm (armv7, armv7s, arm64 combined)
		x86 (i386, x86_64 combined)
	android	armeabi-v7a
		x86
Linux	linux	x86_64
	android	armeabi-v7a
		x86
Windows	windows	x86_64

Compiling (Host and Target are the same)

Linux and MacOSX

For the simple case (not cross-compiling):

$ cd GamePlay-deps
$ mkdir build
$ cd build
$ cmake ..
$ make install

This will build all the libraries and place them into a new "out" directory with the following structure:

• All public headers are copied to out/external-deps/include
• Libraries are built in out/external-deps/lib/<target platform>/<target arch>

When building for multiple targets, only one of those targets requires a "make install". The install step will copy the public headers, which are the same regardless of the target. So it's only needed once.

Windows

For Windows, we generate Visual Studio project files. It should be done from within a Visual Studio 2015 x64 command prompt. You must also have the DirectX SDK installed because OpenAL should use the DirectSound back-end. We also build both the Debug and Release variants.

> cd GamePlay-deps
> mkdir build
> cd build
> cmake -G "Visual Studio 14 Win64" ..
> msbuild GamePlay-deps.sln /property:Configuration=Debug
> msbuild GamePlay-deps.sln /property:Configuration=Release

Cross-Compiling (Host and Target are different)

For cross-compiling we need a properly setup target SDK and we need to make use of either cmake/ios.toolchain.cmake or cmake/android.toolchain.cmake

iOS Setup

Install XCode 6

iOS Compiling

For arm architecture:

$ cd GamePlay-deps
$ mkdir build
$ cd build
$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/ios.toolchain.cmake -DIOS_PLATFORM=OS ..
$ make install

For x86 we change the IOS_PLATFORM flag:

$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/ios.toolchain.cmake -DIOS_PLATFORM=SIMULATOR ..

Android Setup

Install the Android NDK r10e (available here: https://developer.android.com/tools/sdk/ndk/index.html). Once installed you'll need to setup a standalone toolchain directory for each of the architectures you want to build. To do that:

$ cd android-ndk-r10e
$ ./build/tools/make-standalone-toolchain.sh --platform=android-16 --arch=arm --install-dir=/path/to/android-toolchain-arm
$ ./build/tools/make-standalone-toolchain.sh --platform=android-16 --arch=x86 --install-dir=/path/to/android-toolchain-x86

This will install the standalone toolchain directories in /path/to/android-toolchain-arm (for armeabi-v7a) and /path/to/android-toolchain-x86 (for x86, usually simulator).

Android Compiling

With the standalone toolchain directories in place, we can run cmake using the android.toolchain.cmake. For this toolchain file we set the ANDROID_STANDALONE_TOOLCHAIN environment variable to the appropriate standalone toolchain directory. We do this prior to running cmake.

$ cd GamePlay-deps
$ mkdir build
$ cd build
$ export ANDROID_STANDALONE_TOOLCHAIN=/path/to/android-toolchain-arm
$ cmake -DCMAKE_TOOLCHAIN_FILE=../cmake/android.toolchain.cmake ..
$ make

For building the simulator version (or any other arch) just change the environment variable:

$ export ANDROID_STANDALONE_TOOLCHAIN=/path/to/android-toolchain-x86