Error when building for ARMv6

[AgustinCB]

Hi!

I have a project using ears. I'm trying to compile it to ARMv6, but I'm getting the following error:

$ xargo build --target=arm-unknown-linux-gnueabihf --release
   Compiling ears v0.5.1
   Compiling wayland-client v0.12.5
   Compiling jpeg-decoder v0.1.15
   Compiling pistoncore-event_loop v0.37.0
   Compiling piston v0.37.0
error: linking with `arm-linux-gnueabihf-gcc` failed: exit code: 1
  |
  = note: "arm-linux-gnueabihf-gcc" "-Wl,--as-needed" "-Wl,-z,noexecstack" "-L" "/home/agustin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/arm-unknown-linux-gnueabihf/lib" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears0-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears1-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears10-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears11-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears12-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears13-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears14-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears15-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears2-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears3-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears4-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears5-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears6-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears7-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears8-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.ears9-6b2dd9bcd030ef70c97df7db65d010ca.rs.rcgu.o" "-o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/libears-e272dc79f79667e4.so" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.crate.metadata.rcgu.o" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps/ears-e272dc79f79667e4.crate.allocator.rcgu.o" "-Wl,-z,relro,-z,now" "-Wl,-O1" "-nodefaultlibs" "-L" "/home/agustin/projects/emulators/target/arm-unknown-linux-gnueabihf/release/deps" "-L" "/home/agustin/projects/emulators/target/release/deps" "-L" "/usr/local/opt/openal-soft/lib" "-L" "/usr/local/lib" "-L" "/home/agustin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/arm-unknown-linux-gnueabihf/lib" "-l" "openal" "-l" "sndfile" "-Wl,-Bstatic" "-Wl,--whole-archive" "/tmp/rustc.Ed5wsrhR7jAU/liblazy_static-f4ce19faecf5cd71.rlib" "-Wl,--no-whole-archive" "-Wl,--whole-archive" "/tmp/rustc.Ed5wsrhR7jAU/liblibc-11194f979f69d9b5.rlib" "-Wl,--no-whole-archive" "-Wl,--start-group" "-L" "/home/agustin/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/arm-unknown-linux-gnueabihf/lib" "-Wl,-Bdynamic" "-l" "std-9a440ef90899818f" "-Wl,--end-group" "-Wl,-Bstatic" "/tmp/rustc.Ed5wsrhR7jAU/libcompiler_builtins-874d313336916306.rlib" "-Wl,-Bdynamic" "-l" "util" "-l" "util" "-l" "dl" "-l" "rt" "-l" "pthread" "-l" "pthread" "-l" "gcc_s" "-l" "c" "-l" "m" "-l" "rt" "-l" "pthread" "-l" "util" "-l" "util" "-shared"
  = note: /usr/local/lib/libopenal.so: file not recognized: File format not recognized
          collect2: error: ld returned 1 exit status
          

error: aborting due to previous error

error: Could not compile `ears`.
warning: build failed, waiting for other jobs to finish...
error: build failed

Some information:

$ rustup show
Default host: x86_64-unknown-linux-gnu

installed toolchains
--------------------

stable-x86_64-unknown-linux-gnu
nightly-x86_64-unknown-linux-gnu
1.23.0-x86_64-unknown-linux-gnu

installed targets for active toolchain
--------------------------------------

arm-unknown-linux-gnueabihf
x86_64-unknown-linux-gnu

active toolchain
----------------

stable-x86_64-unknown-linux-gnu (default)
rustc 1.28.0 (9634041f0 2018-07-30)

$ arm-linux-gnueabihf-gcc --version
arm-linux-gnueabihf-gcc (GCC) 8.1.0
Copyright (C) 2018 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

$ file /usr/local/lib/libopenal.so
/usr/local/lib/libopenal.so: symbolic link to /usr/lib/libopenal.so
$ file /usr/lib/libopenal.so
/usr/lib/libopenal.so: symbolic link to libopenal.so.1
$ file /usr/lib/libopenal.so.1
/usr/lib/libopenal.so.1: symbolic link to libopenal.so.1.18.2
$ file /usr/lib/libopenal.so.1.18.2
/usr/lib/libopenal.so.1.18.2: ELF 64-bit LSB pie executable x86-64, version 1 (SYSV), dynamically linked, BuildID[sha1]=b64a34de15967f08feb2e4ea4e2a1bb9258b2500, stripped

Any idea what am I doing wrong? Thanks!