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playgameservices / cpp-android-basic-samples

Sample games using the Google Play Games C++ SDK
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Can't link with NDK r12 libc++ #39

Closed ringoz closed 7 years ago

ringoz commented 8 years ago

Using latest Android NDK r12 one can't build the samples.

APP_STL := c++_static NDK_TOOLCHAIN_VERSION := clang

There are a bunch of linking errors when using libc++. For example: libgpg.a:all.cc:function gpg::StateMachine::~StateMachine(): error: undefined reference to 'std::__1::recursive_mutex::~recursive_mutex()'

ggfan commented 8 years ago

thank you for filing the bug, will have a look: in general, it is kind of trouble using different ndk version to build your gpg game from the one they used to build libgpg.a, specifically for the problem like this kind.

I am not sure which ndk version they were using to build gpg lib you are linking with, certainly not 12. and there are changes between 11 ( I am not sure libgpg.a is built with 10 or 11 ) and 12...

claywilkinson commented 8 years ago

The Play Game Services SDK requires r10.

Jakz commented 8 years ago

How are we supposed to solve this issue? I'm working on Android Studio 2.2.2 with NDK r13 and I'd like to use libgpg but I'm unable to link the final native library for the given link errors, unable to find references to std library function implementations (I'm working with clang and c++_static).

I ask this because I'd like to work with multiplayer API without having to pass by Java implementation of Google Play Services which will imply a Java bridge call for each message sent, which is totally unacceptable for performance reasons.

ggfan commented 8 years ago

Yeah, not now. Once play service team release their built with ndk-r12, android studio 2.2.0+ could be used. Gradle-experimental is the only choice before they release new google play games services.

claywilkinson commented 7 years ago

You can change the NDK used in your Android Studio project by editing the local.settings file in your Android Studio project. As mentioned earlier, you need to use r10e when using the GPGS C++ SDK.

You can use the ndkbuild option within Android Studio to build with r10e.