termux-ndk VS proot

Next, we need to set up the Android NDK (Native Development Kit) to compile the llama.cpp project. Visit the Termux-NDK repository and download the latest NDK release. Extract the ZIP file, then set the NDK path in Termux:

10 - Install the Android SDK by copying and pasting the following command in the console: wget https://github.com/lzhiyong/termux-ndk/releases/download/ndk-r23/android-ndk-r23c-aarch64.zip unzip android-ndk-r23c-aarch64.zip export NDK=~/android-ndk-r23c-aarch64

You can use termux. r/termux. For ndk you can use https://github.com/Lzhiyong/termux-ndk for cmake below 3.14 (I think) you have to use a prooted distro. For build-tools you cant use sdkmanager unless you use android studio in GUI mode . you have to download manually . there is a website for that . and that's how you build android apps in Android.

And for ndk I guess you can use this if there is no arm official build. https://github.com/Lzhiyong/termux-ndk

And the docs : https://github.com/Lzhiyong/termux-ndk/tree/master/build-app

Found this https://github.com/Lzhiyong/termux-ndk/blob/master/patches/align_fix.py to patch the binary. But why do I need to patch it?

Did you install ndk from here? https://github.com/Lzhiyong/termux-ndk

You can check out this repo

I suspect some component was upgraded (glib?) and it use some functions that are not handled well by proot. Report issue to https://github.com/termux/proot/issues in order to have chances get it solved for yourself and others with this "black screen" problem.

I needed to look at your comment for 10 minutes before I got what you mean. So you want containers that run on any POSIX operating systems?

You can do this with ptrace() which is in POSIX, but its going to be slow for i/o heavy applications. Unfortunately POSIX doesn't provide anything else (seccomp would already be a step up). See also proot[1], gVisor[2] and User Mode Linux[3] which all use ptrace().

[1] https://github.com/termux/proot

[2] https://gvisor.dev/docs/architecture_guide/platforms/#implem...

[3] https://www.kernel.org/doc/html/v5.9/virt/uml/user_mode_linu...

Documentation does not exist. Just like in best traditions of open source software typically maintained by one person. Look the proot source code instead. Here is the link to extension source code: https://github.com/termux/proot/blob/master/src/extension/link2symlink/link2symlink.c

You'll probably want to do that inside of a proot environment.

Now regarding proot: it can't have higher privileges than your Termux shell session, despite the user "root" which may possibly appear. It was told many times here on Reddit, Termux GitHub and even Wiki (https://wiki.termux.com/wiki/PRoot) that PRoot does not give extra privileges and root user is fake.

I understand the sentiment, but I disagree. From the last time I checked, the big compromise with GNU/Linux phones is still the lack of social media and messaging apps and appstore ecosystem. Android, with root, is every bit as much a computer as a Pinephone and Librem 5, but the opposite isn't true. Termux has PRoot, a user-space implementation of chroot allowing a full distro install. I personally don't have any problem depending on Google, I have a problem with things being locked away with no alternative. Given the option, I will happily accept the risks and void my warray to root.

https://wiki.termux.com/wiki/PRoot