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Export detected NDK version in ndk-env #207

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Merged
bbqsrc merged 1 commit into from
Jun 3, 2026
Merged

Export detected NDK version in ndk-env #207

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1 change: 1 addition & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -121,6 +121,7 @@ These environment variables are exported for use in build scripts and other down
| Variable | Description | Example |
|----------|-------------|---------|
| `CARGO_NDK_ANDROID_PLATFORM` | The Android platform API number as an integer | `21` |
| `CARGO_NDK_NDK_VERSION` | The detected Android NDK revision | `28.0.12433566` |
| `CARGO_NDK_OUTPUT_PATH` | The output path as specified with the `-o` flag | `./jniLibs` |
| `CARGO_NDK_SYSROOT_PATH` | Path to the sysroot inside the Android NDK | `/path/to/ndk/toolchains/llvm/prebuilt/...` |
| `CARGO_NDK_SYSROOT_TARGET` | The target name for files inside the sysroot (differs from LLVM triples) | `aarch64-linux-android` |
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6 changes: 6 additions & 0 deletions src/cargo.rs
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Expand Up @@ -61,6 +61,7 @@ fn clang_lib_path(ndk_home: &Path) -> PathBuf {
const CARGO_NDK_SYSROOT_PATH_KEY: &str = "CARGO_NDK_SYSROOT_PATH";
const CARGO_NDK_SYSROOT_TARGET_KEY: &str = "CARGO_NDK_SYSROOT_TARGET";
const CARGO_NDK_SYSROOT_LIBS_PATH_KEY: &str = "CARGO_NDK_SYSROOT_LIBS_PATH";
const CARGO_NDK_NDK_VERSION_KEY: &str = "CARGO_NDK_NDK_VERSION";

fn is_64bit(triple: &str) -> bool {
triple.starts_with("aarch64") || triple.starts_with("x86_64")
Expand Down Expand Up @@ -153,6 +154,10 @@ pub(crate) fn build_env(
"CARGO_NDK_ANDROID_PLATFORM".to_string(),
platform.to_string().into(),
),
(
CARGO_NDK_NDK_VERSION_KEY.to_string(),
ndk_version.to_string().into(),
),
("ANDROID_PLATFORM".to_string(), platform.to_string().into()),
("ANDROID_ABI".to_string(), android_abi.into()),
// https://github.com/KyleMayes/clang-sys?tab=readme-ov-file#environment-variables
Expand Down Expand Up @@ -379,6 +384,7 @@ mod tests {
);

assert_eq!(env["CARGO_NDK_ANDROID_PLATFORM"], "28");
assert_eq!(env["CARGO_NDK_NDK_VERSION"], "28.0.0");
assert_eq!(env["ANDROID_PLATFORM"], "28");
assert_eq!(env["ANDROID_ABI"], "arm64-v8a");
}
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