Docker compile with pulseaudio backend fails

[mfeif]

I put in the command:

docker run -v /tmp/librespot-build:/build librespot-cross cargo build --release --no-default-features --features pulseaudio-backend

eventually got:
note: /usr/bin/ld: cannot find -lpulse /usr/bin/ld: cannot find -lpulse-simple collect2: error: ld returned 1 exit status

On a lark, I logged into the docker image and installed pulseaudio -dev libraries via apt, but no difference. I poked around in the source and the toml files a bit, but I don't know what I'm doing.

Thanks!

[kingosticks]

Sounds like #142 which despite being closed sounds like it's still an issue.

[mfeif]

Good catch; sorry, I should have searched more thoroughly.

If I restrict my additional libraries to the armhf, I'm able to install them:
apt-get install libpulse-dev:armhf
Works.

But I can't compile still:

docker run -v /tmp/librespot-build:/build librespot-cross cargo build --verbose --release --target arm-unknown-linux-gnueabihf --no-default-features --features pulseaudio-backend`
Fails:
`note: /usr/lib/gcc-cross/arm-linux-gnueabihf/6/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lpulse
          /usr/lib/gcc-cross/arm-linux-gnueabihf/6/../../../../arm-linux-gnueabihf/bin/ld: cannot find -lpulse-simple
          collect2: error: ld returned 1 exit status


error: aborting due to previous error

error: Could not compile `librespot`.

Caused by:
  process didn't exit successfully: `rustc --crate-name librespot src/main.rs --crate-type bin --emit=dep-info,link -C opt-level=3 --cfg feature="librespot-playback" --cfg feature="pulseaudio-backend" -C metadata=af05f7ac2779943a -C extra-filename=-af05f7ac2779943a --out-dir /build/arm-unknown-linux-gnueabihf/release/deps --target arm-unknown-linux-gnueabihf -C linker=arm-linux-gnueabihf-gcc -L dependency=/build/arm-unknown-linux-gnueabihf/release/deps -L dependency=/build/release/deps --extern rpassword=/build/arm-unknown-linux-gnueabihf/release/deps/librpassword-caead108b793ad31.rlib --extern tokio_io=/build/arm-unknown-linux-gnueabihf/release/deps/libtokio_io-b02e80f9841d3c0b.rlib --extern librespot_protocol=/build/arm-unknown-linux-gnueabihf/release/deps/liblibrespot_protocol-636c736aa5a701e2.rlib --extern rand=/build/arm-unknown-linux-gnueabihf/release/deps/librand-28e6cd3eee2b14b3.rlib --extern getopts=/build/arm-unknown-linux-gnueabihf/release/deps/libgetopts-6677b664d415c70e.rlib --extern librespot_metadata=/build/arm-unknown-linux-gnueabihf/release/deps/liblibrespot_metadata-567d9797ec932d39.rlib --extern env_logger=/build/arm-unknown-linux-gnueabihf/release/deps/libenv_logger-67e01bea17ca18a2.rlib --extern serde_derive=/build/release/deps/libserde_derive-ea88eb7fee4e7521.so --extern librespot_connect=/build/arm-unknown-linux-gnueabihf/release/deps/liblibrespot_connect-5d674dc011b746a8.rlib --extern librespot_playback=/build/arm-unknown-linux-gnueabihf/release/deps/liblibrespot_playback-327f73b850132341.rlib --extern tokio_core=/build/arm-unknown-linux-gnueabihf/release/deps/libtokio_core-6300623937f81323.rlib --extern futures=/build/arm-unknown-linux-gnueabihf/release/deps/libfutures-57a5f5a41c6692da.rlib --extern log=/build/arm-unknown-linux-gnueabihf/release/deps/liblog-f382f336e103443e.rlib --extern hyper=/build/arm-unknown-linux-gnueabihf/release/deps/libhyper-d9f7a2519cfeb931.rlib --extern crypto=/build/arm-unknown-linux-gnueabihf/release/deps/libcrypto-7349a6d7444bd56b.rlib --extern serde=/build/arm-unknown-linux-gnueabihf/release/deps/libserde-cb3b4c938aef3ea6.rlib --extern num_bigint=/build/arm-unknown-linux-gnueabihf/release/deps/libnum_bigint-a72be0246fde335f.rlib --extern protobuf=/build/arm-unknown-linux-gnueabihf/release/deps/libprotobuf-3092364993ca4c1b.rlib --extern serde_json=/build/arm-unknown-linux-gnueabihf/release/deps/libserde_json-2bfd44e7f91e1206.rlib --extern tokio_signal=/build/arm-unknown-linux-gnueabihf/release/deps/libtokio_signal-883ad4e518a32fa9.rlib --extern librespot_core=/build/arm-unknown-linux-gnueabihf/release/deps/liblibrespot_core-6b9816d127f60634.rlib --extern base64=/build/arm-unknown-linux-gnueabihf/release/deps/libbase64-6b68909953043529.rlib --extern librespot_audio=/build/arm-unknown-linux-gnueabihf/release/deps/liblibrespot_audio-a4bb241251c72b44.rlib --extern url=/build/arm-unknown-linux-gnueabihf/release/deps/liburl-948ea0ca96ba6781.rlib --extern librespot=/build/arm-unknown-linux-gnueabihf/release/deps/liblibrespot-db91d85429936b82.rlib -L native=/build/arm-unknown-linux-gnueabihf/release/build/rust-crypto-83dc7834eb2b79c8/out` (exit code: 101)

[mfeif]

As per my comments on #142, I was able to compile librespot with the patch referenced there, but it wouldn't work on my device, which was based on much older libraries.

I dug in a little deeper, and have found that this Dockerfile worked for me:

FROM debian:stretch

RUN dpkg --add-architecture armhf
RUN apt-get update

RUN apt-get install -y curl git build-essential crossbuild-essential-armhf
#RUN apt-get install -y libasound2-dev libasound2-dev:armhf
RUN apt-get install -y libpulse-dev:armhf

RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
ENV PATH="/root/.cargo/bin/:${PATH}"
RUN rustup target add arm-unknown-linux-gnueabihf

RUN mkdir /.cargo && \
    echo '[target.arm-unknown-linux-gnueabihf]\nlinker = "arm-linux-gnueabihf-gcc"' > /.cargo/config

RUN mkdir /build && \
    mkdir /pi-tools && \
    curl -L https://github.com/raspberrypi/tools/archive/648a6eeb1e3c2b40af4eb34d88941ee0edeb3e9a.tar.gz | tar xz --strip-components 1 -C /pi-tools

ENV CARGO_TARGET_DIR /build
ENV CARGO_HOME /build/cache

ADD . /src
WORKDIR /src
CMD ["/src/contrib/docker-build-armv6hf-pulse.sh"]

You see that I stripped out just about everything that wasn't armhf oriented, but the key difference that led to a passing build seemed to be that I removed libpulse-dev in favor of only the :armhf variation. I also changed ending build script line to use the arm6hf version of the script, which you can see I modified to be just about pulse:

#!/usr/bin/env bash

# Snipped and tucked from https://github.com/plietar/librespot/pull/202/commits/21549641d39399cbaec0bc92b36c9951d1b87b90
# and further inputs from https://github.com/kingosticks/librespot/commit/c55dd20bd6c7e44dd75ff33185cf50b2d3bd79c3

set -eux
# Get alsa lib and headers
ALSA_VER="1.0.25-4"
DEPS=( \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/a/alsa-lib/libasound2_${ALSA_VER}_armhf.deb" \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/a/alsa-lib/libasound2-dev_${ALSA_VER}_armhf.deb" \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/p/pulseaudio/pulseaudio_11.1-5+b2_armhf.deb" \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/p/pulseaudio/pulseaudio-utils_11.1-5+b2_armhf.deb" \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/p/pulseaudio/pulseaudio-module-zeroconf_11.1-5+b2_armhf.deb" \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/p/pulseaudio/libpulse0_11.1-5+b2_armhf.deb" \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/p/pulseaudio/libpulse-mainloop-glib0_11.1-5+b2_armhf.deb" \
  "http://mirrordirector.raspbian.org/raspbian/pool/main/p/pulseaudio/libpulse-dev_11.1-5+b2_armhf.deb"
)

# Collect Paths
SYSROOT="/pi-tools/arm-bcm2708/arm-bcm2708hardfp-linux-gnueabi/arm-bcm2708hardfp-linux-gnueabi/sysroot"
GCC="/pi-tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin"
GCC_SYSROOT="$GCC/gcc-sysroot"


export PATH=/pi-tools/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin/:$PATH

# Link the compiler
export TARGET_CC="$GCC/arm-linux-gnueabihf-gcc"

# Create wrapper around gcc to point to rpi sysroot
echo -e '#!/bin/bash' "\n$TARGET_CC --sysroot $SYSROOT \"\$@\"" > $GCC_SYSROOT
chmod +x $GCC_SYSROOT

# Add extra target dependencies to our rpi sysroot
for path in "${DEPS[@]}"; do
  curl -OL $path
  dpkg -x $(basename $path) $SYSROOT
done

# i don't why this is neccessary
# ln -s ld-linux.so.3 $SYSROOT/lib/ld-linux-armhf.so.3

# point cargo to use gcc wrapper as linker
echo -e '[target.arm-unknown-linux-gnueabihf]\nlinker = "gcc-sysroot"' > /.cargo/config

# Build
#cargo build --release --target arm-unknown-linux-gnueabihf --no-default-features --features "alsa-backend"
cargo build --release --target arm-unknown-linux-gnueabihf --no-default-features --features "pulse-backend"

(But I don't actually think this script runs, because we have to run the second command after building the docker image as per the instructions in the wiki...) I think I added in a lot more libraries there than are necessary for compilation; I was just in trial and error, not fully knowing how cross-compilation works. I should think that the non -dev debs could be removed. (But again, I'm not even sure that this script runs :-/ )

I then built and compiled with these commands:

docker build -t lr-pulse -f contrib/Dockerfile.pulse .
docker run -v /tmp/lr-build:/build lr-pulse cargo build --release --target arm-unknown-linux-gnueabihf --no-default-features --features pulse-backend

I presume that one could re-enable ALSA and get BOTH backends running, but I haven't done that yet.

I'm writing this up in case it helps others; meanwhile, I suppose an arch-specific Docker build process might be warranted in this case? I could refine what I've done above and make a pull request...

[sashahilton00]

@mfeif if you're still up for it, a PR for arch specific docker would be good to have.