Building the `aarch64-linux-android` stdlib fails

[mmatyas]

I was trying to build the stdlibs for the aarch64-linux-android target like this:

rust/my_empty_build_dir $ ../configure \
--target=aarch64-linux-android \
--aarch64-linux-android-ndk="$ANDROID_TOOLCHAIN_ARM64" \
--prefix=$(pwd)/installdir --disable-docs --enable-ccache

make -j4 && make install

However, the build fails with the following error:

...
rustc: x86_64-unknown-linux-gnu/stage2/lib/rustlib/aarch64-linux-android/lib/libcollections
rustc: x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libcollections
rustc: x86_64-unknown-linux-gnu/stage2/lib/rustlib/aarch64-linux-android/lib/libstd
rustc: x86_64-unknown-linux-gnu/stage2/lib/rustlib/x86_64-unknown-linux-gnu/lib/libstd
../src/libstd/sys/unix/ext/fs.rs:314:38: 314:42 error: mismatched types:
 expected `u16`,
    found `u32` [E0308]
../src/libstd/sys/unix/ext/fs.rs:314         self.as_inner_mut().set_mode(mode);
                                                                          ^~~~
../src/libstd/sys/unix/ext/fs.rs:314:38: 314:42 help: run `rustc --explain E0308` to see a detailed explanation
../src/libstd/sys/unix/fs.rs:119:21: 119:39 error: mismatched types:
 expected `i32`,
    found `i64` [E0308]
../src/libstd/sys/unix/fs.rs:119             tv_sec: self.stat.st_mtime,
                                                     ^~~~~~~~~~~~~~~~~~
../src/libstd/sys/unix/fs.rs:119:21: 119:39 help: run `rustc --explain E0308` to see a detailed explanation
../src/libstd/sys/unix/fs.rs:126:21: 126:39 error: mismatched types:
 expected `i32`,
    found `i64` [E0308]
../src/libstd/sys/unix/fs.rs:126             tv_sec: self.stat.st_atime,
                                                     ^~~~~~~~~~~~~~~~~~
../src/libstd/sys/unix/fs.rs:126:21: 126:39 help: run `rustc --explain E0308` to see a detailed explanation
../src/libstd/sys/unix/fs.rs:182:41: 182:50 error: mismatched types:
 expected `u32`,
    found `u16` [E0308]
../src/libstd/sys/unix/fs.rs:182     pub fn mode(&self) -> raw::mode_t { self.mode }
                                                                         ^~~~~~~~~
../src/libstd/sys/unix/fs.rs:182:41: 182:50 help: run `rustc --explain E0308` to see a detailed explanation
error: aborting due to 4 previous errors
/tmp/snippets/rustbuild/rust/mk/target.mk:186: recipe for target 'x86_64-unknown-linux-gnu/stage2/lib/rustlib/aarch64-linux-android/lib/stamp.std' failed
make: *** [x86_64-unknown-linux-gnu/stage2/lib/rustlib/aarch64-linux-android/lib/stamp.std] Error 101
make: *** Waiting for unfinished jobs....

Here is the full build log: http://pastebin.com/cX9WgVA4

I'm using Xubuntu 15.10. At the time of building, the Rust master was at b9732ed.

[alexcrichton]

Unfortunately aarch64-linux-androideabi is a Tier 3 platform which means that we don't guarantee that it builds in-tree right now. Patches are certainly welcome to fix this, however! We tend to not keep issues tracking build support for all Tier 3 platforms, however, so I'm going to close this.

If you're interested in promoting this to at least tier 2 you could also help modify out android builder to be able to support this target!