No c++11 support for Android

[SGaist]

Hi,

This stack overflow answer shows how to implement to_string as well as links to here which gives more details about string support in the NDK.

[JaTe]

@SGaist Since I'm getting multiple errors implementing all those functions isn't really an option. I've heard about the Android.mk fix, but there isn't really such a file in Qt, is there?

[JaTe]

I've updated my question, as it seems to be c++11 support more than include problems.

[Gourmet]

Use Linux workstation with complete GNU CPP compiler instead of castrated Windows MinGW - and you will get full C++11 support. I do that just like that exactly. It is much more comfortable develop and debug Android apps on Linux rather than on Windows. Cause Android itself is Linux by nature...

[jsulm]

@Gourmet He is building for Android using the official compiler from NDK I guess, not MinGW.
And why do you think MinGW is "castrated"? It is simply GCC ported to Windows.

[Eeli K]

Does anyone have a real solution for this, not strings but the whole bunch? I don't know the details, but I have an app which I naively developed only with the Desktop kit and it should really work in Android. Do I have to spend a couple of days to refactor to C++98?

Library problems:

C:\Users\Eeli\Documents\Kaiku\panelsdata.cpp:149: error: 'class std::initializer_list<std::vector<_WALL_PANEL> >' has no member named 'erase'

But also non-library:

//code
for (WALL_PANEL& p: panels) {
        p.Zpos++;

C:\Users\Eeli\Documents\Kaiku\panelsdata.cpp:158: error: 'const class std::vector<_WALL_PANEL>' has no member named 'Zpos'
         p.Zpos++;
           ^

And about 10 others in just 1 file. This all compiles and runs fine with Creator 4.7.1 and Qt 5.11.2 with the default Desktop Kit on Windows.

So, really, no GCC 5.3 or C++11 for Android?

[jsulm]

@Eeli-K What type is WALL_PANEL?

[sierdzio]

Here's a possible hack around it: https://forum.qt.io/topic/38949/stl-on-android

Another possibility: https://github.com/nlohmann/json/issues/219#issuecomment-221686166

Or wait for Qt 5.12 which switches to clang on Android, and supports much more modern c++.

[Eeli K]

@jsulm It's just a simple struct with byte-long fields.

@sierdzio Good news about 5.12, but the prototype must be ready tomorrow :) I'll see the hacks and maybe try 5.12 beta.

[Eeli K]

I got apk package done with Qt 5.12b and Linux. Windows gives me problems. I'll start another thread for it because it's not directly related.

[Eeli K]

No need for another thread, I got it working. Here are the android related package versions which finally made it to work in case someone else has troubles:

The latest JDK and NDK didn't work.

I hope they fix the name strings for the next beta. It's annoying and confusing to have "GCC" everywhere even though it really uses clang.