libqrencode-android | 使用libqrencode-android在C中进行高效二维码编码 , Efficient | QRCode Processing library

This software compiles for x86_64 linux and windows. It's written in C+ and relies heavily on the SDL as well as depending on libraries such as curl, microhttp, libharu, etc. Some 2 years ago it also compiled for android x86 and arm32 using Pelya's [commandergenious][1] port but that knowledge was lost, development continued and i'm the newcomer. I'm not that versed on Android or their take on makefiles.

I managed to include one library (haru) in commandergenious but trying to include other libraries resulted in multiple failures, so kinda stopped at that. I also had some issues using custom makefiles as suggested in the readme.

I've adapted an existing regular makefile but it ends up conflicting with existing dependencies, i.e., ndk-compiled cyptopp.so would cause undefined symbols on clang-compiled app, even though the signatures are "the same" (std::__ndk1::basic_string vs std::__cxx11::basic_string).

I've since taken to recompiling the code with clang instead of gcc (fixing a few bugs on the way due to clang being more strict) and using Android.mk instead of regular makefiles so i could cross-compile all components using just the NDK.

I tried giving a go at Android's LOCAL_MODULEs but the interdependent LOCAL_PATHs became too messy. I may get back to this route using [prebuilts][2] instead. It'll help segregate some issues should they arise.

Since my host is x86_68 Ubuntu Xenial i took the (maybe incorrect) path of setting up a directory with armeabi-v7a arm64-v8a x86 x86_64 subdirectories and ar xing .deb files (from Debian Buster as Xenial has sparse arm .debs) into those for all the libraries and includes i need. (It's $(HOME)/dev/multiarch bellow.)

At the moment, this is my Application.mk