make build-android-rn-example failed

[victoryeo]

I tried this :
"make build-android-rn-example", it failed.

error[E0463]: can't find crate for `core`

note: the aarch64-linux-android target may not be installed
error: Could not compile byte-tools.
error: Could not compile scopeguard.
error[E0463]: can't find crate for std
note: the armv7-linux-androideabi target may not be installed
Could not compile rand_core.

rustc --version --verbose:
rustc 1.38.0 (625451e37 2019-09-23)
binary: rustc
commit-hash: 625451e376bb2e5283fc4741caa0a3e8a2ca4d54
commit-date: 2019-09-23
host: x86_64-unknown-linux-gnu
release: 1.38.0
LLVM version: 9.0

In the android-rn-example-build.sh, i check the bash script. It is written for MacOS only. The script cannot work on Linux.

export ANDROID_NDK_TOOLCHAINS=$HOME/Library/Android/sdk/ndk-bundle/toolchains/llvm/prebuilt/darwin-x86_64/bin

[XuNeal]

You should install the ndk https://developer.android.com/ndk, and set the ANDROID_NDK_TOOLCHAINS to the right path.