does the compiler files suppose to be inside cargo-ndk-3.2.0 crate?

[AnotherCoder1]

After following the instruction in the documentation,

like issuing the rustup command to download the appropriate compiler for certain platforms, and compile it using cargo command apparently, I have got some error saying could not found a certain module or file, like it cannot resolve the function
declaration.

Initially, I do not know where the crate folder installed on my machine, then I found something interesting in:

.cargo\registry\src\index.crates.io-xxxxxxxxxx\cargo-ndk-3.2.0

So, I suppose this is the crate downloaded from rust repositories crates.io written by you.

Then, I navigate into ./target folder and found:

1. aarch64-linux-android folder
2. armv7-linux-androideabi folder

Are those two folders is in the correct directory ? or have I messed up file hierarchy

because apparently I have error saying something not found, so I assume my file hierarchy is not the same as you.

I am new to rust by the way.

[AnotherCoder1]

error[E0425]: cannot find value ARCH in this scope
error[E0425]: cannot find value base_dir in this scope

error: could not compile cargo-ndk (bin "cargo-ndk") due to 7 previous errors
[2023-07-21T17:02:14Z INFO cargo_ndk::cli] If the build failed due to a missing target, you can run this command:
[2023-07-21T17:02:14Z INFO cargo_ndk::cli]
[2023-07-21T17:02:14Z INFO cargo_ndk::cli] rustup target install aarch64-linux-android

It says, I need to install aarch64-linux-android which I already did.
What went wrong ? am I using wrong folders?