I want to build an Android app which will be an interface to convert C++ into assembly code for ARM Cortex M3 architecture.

I'm not an android java developer, and I do mainly arduino projects with C/C++. So I need your help to point me in good directions about how to build an android app with java in Android Studio or similar, which will be able to convert from C++ source code to ASM code M3 Cortex.

I did some research and found that I need to use ARM NONE EABI GCC compiler to generate ASM code from C++, simple like these command line instructions:

arm-none-eabi-gcc -O2 -mthumb -c test.c -o test.o
arm-none-eabi-objdump -D test.o

I tried to build that compiler using android Termux app, but failed. I have followed many posts and articles about how to build arm-none-eabi-gcc binary file. Even tried to run different similar binaries in termux but always failed, probably because my smartphone device architecture is AARCH64 and I use third party app like Termux as linux terminal emulator, which results in different kind of errors. However I didn't found a good article about how to install this arm compiler on android using Termux.

Even opened a new question about how to build this compiler, but no answers yet.

I guess that in order to convert C++ to ASM (M3 Cortex) I have to execute some shell commands using an arm compiler as command line tool with parameters, from my android app something like:

try{
    Process su = Runtime.getRuntime().exec("su");
    DataOutputStream outputStream = new DataOutputStream(su.getOutputStream());

    outputStream.writeBytes("arm-none-eabi-gcc -O2 -mthumb -c test.c -o test.o");
    outputStream.flush();

    outputStream.writeBytes("exit\n");
    outputStream.flush();
    su.waitFor();
}catch(IOException e){
    throw new Exception(e);
}catch(InterruptedException e){
    throw new Exception(e);
}

My method was to use GCC On Android Using Termux app as third party which have ARM compiler installed, that I can call with termux API from my android app to convert C++ to ASM, that will easier the process of building of my android app.

But I'm not sure if that is even the right way to do that, as I'm a beginner in android app development. So please help with suggestions, examples which will give me the right way to achive my goals.