Fix Travis CI building ntcore about ntcore HOT 15 CLOSED

Technically no, but if we can only maintain a single docker image that'd be better for maintaining

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RoboRIO ARM toolchain is here: https://launchpad.net/~wpilib/+archive/ubuntu/toolchain-beta
You'll need to add:

sudo add-apt-repository ppa:wpilib/toolchain-beta -y
sudo apt-get update -q
sudo apt-get install frc-toolchain -y

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Distro wise, I think we only care about Ubuntu 16.04 right now. There's really no reason it shouldn't work on other distros, so I'm not seeing an advantage to actually doing CI testing on them.

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apt dependencies: g++-multilib, lib32stdc++6, python3, python3-pip, clang-format-3.8

Also want to run: pip3 install --user wpiformat

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RoboRIO ARM toolchain is here

Do I need to add it regardless of what the compiler target is (Linux desktop vs arm)?

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By default gradle builds both. There's flags to disable either arm or native, but why pay the startup time twice?

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I'm wondering if it is faster to build each in parallel using the build matrix? If you don't think so I can make it one Docker image. If building each one sequentially is significantly slower then it may make sense to create two travis jobs.

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Well, it makes sense to make it one Docker image either way right? We can always decide to build it as separate jobs with the same Docker image?

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The docker image, (if not uploaded to the docker hub or similar) will get re-built for every test. I don't know how long it takes to install the arm compiler.

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ah. in that case, yes, it may be faster to be two in parallel with the build matrix. The flags are -PskipAthena for native only, -PonlyAthena for roborio only. The roborio only build only needs the frc-toolchain package, the native one needs g++-multilib, python3, etc.

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EDIT:
It might help if I clean my environment before I shove the project into the docker container.

You can ignore the rest of this.

Command:

./gradlew build -PskipAthena --stacktrace --console=plain

Error I get:

:linkNtcoreSharedLibrary/usr/src/app/build/objs/ntcore/shared/ntcoreCpp/czv21mas3ztwkli314ii733dt/Notifier.o: file not recognized: File format not recognized
collect2: error: ld returned 1 exit status

Dockerfile:

FROM ubuntu:16.04

RUN \
  apt-get update && \
  apt-get install -y software-properties-common curl g++-multilib lib32stdc++6 python3 python3-pip clang-format-3.8 && \
  echo oracle-java8-installer shared/accepted-oracle-license-v1-1 select true | debconf-set-selections && \
  add-apt-repository -y ppa:webupd8team/java && \
  apt-get update && \
  apt-get install -y oracle-java8-installer && \
  rm -rf /var/lib/apt/lists/* && \
  rm -rf /var/cache/oracle-jdk8-installer && \
  pip3 install --user wpiformat

ENV JAVA_HOME /usr/lib/jvm/java-8-oracle

RUN mkdir -p /usr/src/app

WORKDIR /usr/src/app

COPY . /usr/src/app

Thoughts??

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OBE by allwpilib merge.

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OBE?

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OBE = Overcome By Events

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#209 (comment)

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