in android, println not working.

[ksh8281]

i work with latest rust(bf98981).
i try to run simple code on android-18 with ndk-r9

fn main() { println("hello"); }

but it failed with this message below

task '<main>' failed at 'Unhandled condition: io_error: rt::io::IoError{kind: IoUnavailable, desc: "I/O is unavailable", detail: None}'

[alexcrichton]

This is likely because the rustuv crate is either not being linked against or not being found. Are you sure that you're pushing the rustuv crate to the device?

[ksh8281]

yes. i testing with

libanon_trait_static_method_lib-15fb3a718ea23983-0.0.so
libanonexternmod-15fb3a718ea23983-0.1.so
libextra-a7c050cfd46b2c9a-0.9-pre.so
libgnustl_shared.so
librustrt.so
librustuv-d4277cd5f62aa99-0.9-pre.so
libstd-6c65cf4b443341b1-0.9-pre.so
<my test helloworld>

in same folder and i try to run my helloworld program with command below

 <adb shell>#LD_LIBRARY_PATH=. ./<my test helloworld>

[alexcrichton]

hm that's not a good sign. This will happen whenever the crate isn't compiled against the rustuv crate (it's got the #[no_uv] attribute, or the rustuv crate couldn't be found at runtime (one of its weak symbols wasn't resolved).

I'm not exactly sure why that's happening in this case, and that requires further investigation.

[luqmana]

Hmmm, seems to work for me:

-> % adb shell
root@generic:/ # cd /data/tmp/rust
root@generic:/data/tmp/rust # ls
hello
libgnustl_shared.so
librustrt.so
librustuv-d4277cd5f62aa99-0.9-pre.so
libstd-6c65cf4b443341b1-0.9-pre.so
root@generic:/data/tmp/rust # LD_LIBRARY_PATH=. ./hello
Hello World!

[ksh8281]

i found my problem. i tried to compile rust with arm-linux-androideabi-gcc-4.8
it cause complile error, but retry compiling rust, weird..compile is continue.
i think rust is only compiled with arm-linux-androideabi-gcc-4.6.

[luqmana]

@ksh8281 well i guess that fixes the immediate issues but I think we'd like to be able to use gcc-4.8 eventually for android so perhaps open another issue for that?

[ksh8281]

#10323

[ksh8281]

@luqmana i found what is exact problem