Running -sys crate's test fails on nightly

[nbigaouette-eai]

Running tests for the tensorflow-sys crate fails on nightly, even though it works on stable.

This is using the pre-built binary, so libtensorflow.so is located in tensorflow-sys/target/libtensorflow-cpu-linux-x86_64-1.0.0/lib/libtensorflow.so.

(~/tensorflow_rust.git/tensorflow-sys)
 -> cargo +nightly test -vv
       Fresh lazy_static v0.2.4
       Fresh gcc v0.3.43
       Fresh openssl-probe v0.1.0
       Fresh regex-syntax v0.3.9
       Fresh libc v0.2.21
       Fresh filetime v0.1.10
       Fresh memchr v0.1.11
       Fresh aho-corasick v0.5.3
       Fresh utf8-ranges v0.1.3
       Fresh winapi-build v0.1.1
       Fresh pkg-config v0.3.9
       Fresh winapi v0.2.8
       Fresh kernel32-sys v0.2.2
       Fresh thread-id v2.0.0
       Fresh thread_local v0.2.7
       Fresh regex v0.1.80
       Fresh xattr v0.1.11
       Fresh tar v0.4.10
       Fresh miniz-sys v0.1.9
       Fresh flate2 v0.2.17
       Fresh libz-sys v1.0.13
       Fresh openssl-sys v0.9.8
       Fresh curl-sys v0.3.10
       Fresh semver-parser v0.6.2
       Fresh semver v0.5.1
       Fresh curl v0.4.6
       Fresh tensorflow-sys v0.7.0 (file:///home/nbigaouette/tensorflow_rust.git/tensorflow-sys)
    Finished dev [unoptimized + debuginfo] target(s) in 0.1 secs
     Running `/home/nbigaouette/tensorflow_rust.git/target/debug/deps/lib-b2190e536168b674`
/home/nbigaouette/tensorflow_rust.git/target/debug/deps/lib-b2190e536168b674: error while loading shared libraries: libtensorflow.so: cannot open shared object file: No such file or directory
error: test failed

Running the test passes using the stable 1.16:

(~/tensorflow_rust.git/tensorflow-sys)
 -> cargo test -vv
       Fresh gcc v0.3.43
       Fresh regex-syntax v0.3.9
       Fresh winapi-build v0.1.1
       Fresh utf8-ranges v0.1.3
       Fresh pkg-config v0.3.9
       Fresh libc v0.2.21
       Fresh openssl-probe v0.1.0
       Fresh xattr v0.1.11
       Fresh miniz-sys v0.1.9
       Fresh filetime v0.1.10
       Fresh memchr v0.1.11
       Fresh tar v0.4.10
       Fresh libz-sys v1.0.13
       Fresh flate2 v0.2.17
       Fresh winapi v0.2.8
       Fresh lazy_static v0.2.4
       Fresh kernel32-sys v0.2.2
       Fresh aho-corasick v0.5.3
       Fresh thread-id v2.0.0
       Fresh openssl-sys v0.9.8
       Fresh thread_local v0.2.7
       Fresh regex v0.1.80
       Fresh semver-parser v0.6.2
       Fresh semver v0.5.1
       Fresh curl-sys v0.3.10
       Fresh curl v0.4.6
       Fresh tensorflow-sys v0.7.0 (file:///home/nbigaouette/tensorflow_rust.git/tensorflow-sys)
    Finished dev [unoptimized + debuginfo] target(s) in 0.0 secs
     Running `/home/nbigaouette/tensorflow_rust.git/target/debug/deps/lib-b2190e536168b674`

running 1 test
test linkage ... ok

test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured

     Running `/home/nbigaouette/tensorflow_rust.git/target/debug/deps/tensorflow_sys-dde201bfdb2eb731`

running 4 tests
test bindgen_test_layout_TF_Buffer ... ok
test bindgen_test_layout_TF_AttrMetadata ... ok
test bindgen_test_layout_TF_Output ... ok
test bindgen_test_layout_TF_Input ... ok

test result: ok. 4 passed; 0 failed; 0 ignored; 0 measured

   Doc-tests tensorflow-sys
     Running `rustdoc --test /home/nbigaouette/tensorflow_rust.git/tensorflow-sys/src/lib.rs --crate-name tensorflow_sys -L dependency=/home/nbigaouette/tensorflow_rust.git/target/
debug/deps -L native=/home/nbigaouette/tensorflow_rust.git/target/debug/build/miniz-sys-18005000ddedadf4/out -L native=/home/nbigaouette/tensorflow_rust.git/tensorflow-sys/target/l
ibtensorflow-cpu-linux-x86_64-1.0.0/lib -L native=/usr/lib --extern libc=/home/nbigaouette/tensorflow_rust.git/target/debug/deps/liblibc-5dc7b85e748840b4.rlib --extern tensorflow_sys=/home/nbigaou
ette/tensorflow_rust.git/target/debug/deps/libtensorflow_sys-abb7df69fd313205.rlib`

running 0 tests

test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured

Could this be related to rust-lang/cargo#2478 ? In that case using cargo:rustc-link-search=native={} instead of cargo:rustc-link-search={} should fix this. Unfortunately, it doesn't.

I'm not sure how to fix this...

This is on master (8bd62df).

[nbigaouette-eai]

Forgot to give nightly version:

 -> rustup run nightly rustc --version
rustc 1.17.0-nightly (0aeb9c129 2017-03-15)

[nbigaouette-eai]

PR #72 fixes this. Closing.