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Build Linux binary in an older docker container (#268)

Currently our Linux binaries aren't quite as portable as they otherwise could
be. There's two primary reasons for this, and one of them is that the binary is
produced in a relatively recent Linux distribution (Ubuntu 16.04) which means
it has a relatively recent requirement in terms of glibc versions. On
OSX/Windows we can set some flags to rely on older libc implementations, but on
Linux we have to actually build against an older version.

This commit switches the container for the build to CentOS 6 instead of the
default Ubuntu 16.04. The main trick here is also finding a C++11-capable
compiler to compile wabt. Turns out though there's a helpful tutorial for this
at https://edwards.sdsu.edu/research/c11-on-centos-6/ and it was as easy as
installing a few packages.

The second portability concern of our Linux binaries is that they link
dynamically to `libstdc++.so` which isn't always installed on target systems,
or even if it is it may be too old or have a different ABI. This is solved by
statically linking to `libstdc++.a` in the build on Azure by doing a bit of
trickery with libraries and what's available.

After these results the glibc requirements drops from 2.18 (released in 2013)
to 2.6 (released in 2007) and avoids the need for users to have libstdc++.so
installed. We may eventually want to investigate fully-static musl binaries,
but finding a musl compiler for C++ is something I'm not that good at, so I
figure this is probably good enough for now.
pull/274/head
Alex Crichton 5 years ago
committed by Till Schneidereit
parent
commit
47eee434d4
  1. 145
      .azure-pipelines.yml
  2. 103
      ci/azure-build-release.yml

145
.azure-pipelines.yml

@ -94,8 +94,6 @@ jobs:
# Statically link against msvcrt to produce slightly more portable
# binaries on Windows by reducing our binary compatibility requirements.
RUSTFLAGS: -Ctarget-feature=+crt-static
linux:
imageName: 'ubuntu-16.04'
mac:
imageName: 'macos-10.14'
# Lower the deployment target from our build image in an attempt to
@ -103,121 +101,50 @@ jobs:
# 10.9 here is arbitrarily chosen and just happens to be the lowest that
# works at this time. Raising this is probably fine.
MACOSX_DEPLOYMENT_TARGET: 10.9
variables:
toolchain: stable
pool:
vmImage: $(imageName)
# variables:
# SCCACHE_DIR: $(Pipeline.Workspace)/.sccache
# RUSTC_WRAPPER: sccache
steps:
- checkout: self
submodules: true
- template: ci/azure-install-rust.yml
- bash: echo "##vso[task.setvariable variable=RUSTC_VERSION;]`rustc --version`"
displayName: Set rustc version string for caching
# - bash: |
# set -e
# curl -Lfo sccache.tar.gz https://github.com/mozilla/sccache/releases/download/0.2.9/sccache-0.2.9-x86_64-apple-darwin.tar.gz
# tar -xzf sccache.tar.gz
# cp sccache-*/sccache /usr/local/bin/
# displayName: Install sccache (OSX)
# condition: and(succeeded(), eq(variables['Agent.OS'], 'Darwin'))
# - bash: |
# set -e
# curl -Lfo sccache.tar.gz https://github.com/mozilla/sccache/releases/download/0.2.9/sccache-0.2.9-x86_64-unknown-linux-musl.tar.gz
# tar -xzf sccache.tar.gz
# sudo cp sccache-*/sccache /usr/local/bin/
# displayName: Install sccache (Linux)
# condition: and(succeeded(), eq(variables['Agent.OS'], 'Linux'))
# - script: |
# curl -Lfo sccache.tar.gz https://github.com/mozilla/sccache/releases/download/0.2.9/sccache-0.2.9-x86_64-pc-windows-msvc.tar.gz
# tar -xzf sccache.tar.gz
# move sccache-* sccache
# echo "##vso[task.prependpath]%CD%\sccache"
# displayName: Install sccache (Windows)
# condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))
- bash: cargo build --release
displayName: Cargo build
- template: ci/azure-build-release.yml
# Test what we're about to release in release mode itself. This tests
# everything except lightbeam which requires nightly which happens above.
- bash: cargo test --release --all --exclude lightbeam --exclude wasmtime-wasi-c
displayName: Cargo test
env:
RUST_BACKTRACE: 1
# - script: sccache --show-stats
# displayName: post-compile sccache stats
- bash: |
echo "##vso[task.setvariable variable=tagName;]`echo $BUILD_SOURCEBRANCH | sed -e 's|refs/tags/||'`"
displayName: Set tag name
condition: startsWith(variables['Build.SourceBranch'], 'refs/tags/')
- bash: |
echo "##vso[task.setvariable variable=tagName;]dev"
displayName: Set tag name to "dev"
condition: not(startsWith(variables['Build.SourceBranch'], 'refs/tags/'))
- bash: echo "##vso[task.setvariable variable=basename;]wasmtime-$(tagName)-x86_64-windows"
displayName: Configure basename var
condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))
- bash: echo "##vso[task.setvariable variable=basename;]wasmtime-$(tagName)-x86_64-apple"
displayName: Configure basename var
condition: and(succeeded(), eq(variables['Agent.OS'], 'Darwin'))
- bash: echo "##vso[task.setvariable variable=basename;]wasmtime-$(tagName)-x86_64-linux"
displayName: Configure basename var
condition: and(succeeded(), eq( variables['Agent.OS'], 'Linux' ))
- bash: |
set -e
mkdir -p $BUILD_BINARIESDIRECTORY/$BASENAME
if [ "$AGENT_OS" = "Windows_NT" ]; then
ext=.exe
fi
cp LICENSE README.md target/release/{wasmtime,wasm2obj}$ext $BUILD_BINARIESDIRECTORY/$BASENAME
displayName: Copy binaries
- bash: |
set -e
export WT_VERSION=`cat Cargo.toml | sed -n 's/^version = "\([^"]*\)".*/\1/p'`
"$WIX/bin/candle" -arch x64 -out target/wasmtime.wixobj installer/msi/wasmtime.wxs
"$WIX/bin/light" -out $BUILD_ARTIFACTSTAGINGDIRECTORY/$(basename).msi target/wasmtime.wixobj -ext WixUtilExtension
rm $BUILD_ARTIFACTSTAGINGDIRECTORY/$(basename).wixpdb
displayName: Create installer (Windows)
condition: eq(variables['Agent.OS'], 'Windows_NT')
- task: ArchiveFiles@2
inputs:
rootFolderOrFile: $(Build.BinariesDirectory)/$(basename)
archiveType: 'zip'
archiveFile: '$(Build.ArtifactStagingDirectory)/$(basename).zip'
displayName: Archive files (Win)
condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))
- task: ArchiveFiles@2
inputs:
rootFolderOrFile: $(Build.BinariesDirectory)/$(basename)
archiveType: 'tar'
tarCompression: 'xz'
archiveFile: '$(Build.ArtifactStagingDirectory)/$(basename).tar.xz'
displayName: Archive files (Unix)
condition: and(succeeded(), ne(variables['Agent.OS'], 'Windows_NT'))
- task: PublishPipelineArtifact@1
inputs:
path: $(Build.ArtifactStagingDirectory)/
artifactName: 'bundle-$(Agent.OS)'
# Build the Linux release binary in an older Linux container (in this case
# Centos 6)
- job: Build_linux
variables:
toolchain: stable
container:
image: centos:6
options: "--name ci-container -v /usr/bin/docker:/tmp/docker:ro"
steps:
# We're executing in the container as non-root but `yum` requires root. We
# need to install `sudo` but to do that we need `sudo`. Do a bit of a weird
# hack where we use the host `docker` executable to re-execute in our own
# container with the root user to install `sudo`
- bash: /tmp/docker exec -t -u 0 ci-container sh -c "yum install -y sudo"
displayName: Configure sudo
# See https://edwards.sdsu.edu/research/c11-on-centos-6/ for where these
# various commands came from.
- bash: |
set -e
sudo yum install -y centos-release-scl cmake xz
sudo yum install -y devtoolset-8-gcc devtoolset-8-binutils devtoolset-8-gcc-c++
echo "##vso[task.prependpath]/opt/rh/devtoolset-8/root/usr/bin"
displayName: Install system dependencies
# Delete `libstdc++.so` to force gcc to link against `libstdc++.a` instead.
# This is a hack and not the right way to do this, but it ends up doing the
# right thing for now.
- bash: sudo rm -f /opt/rh/devtoolset-8/root/usr/lib/gcc/x86_64-redhat-linux/8/libstdc++.so
displayName: Force a static libstdc++
- template: ci/azure-build-release.yml
- job: Publish
dependsOn: Build
dependsOn:
- Build
- Build_linux
condition: and(succeeded(), in(variables['Build.Reason'], 'IndividualCI', 'BatchedCI'))
steps:
# Checking out the sources is needed to be able to delete the "dev" tag, see below.

103
ci/azure-build-release.yml

@ -0,0 +1,103 @@
steps:
- checkout: self
submodules: true
- template: azure-install-rust.yml
- bash: echo "##vso[task.setvariable variable=RUSTC_VERSION;]`rustc --version`"
displayName: Set rustc version string for caching
# - bash: |
# set -e
# curl -Lfo sccache.tar.gz https://github.com/mozilla/sccache/releases/download/0.2.9/sccache-0.2.9-x86_64-apple-darwin.tar.gz
# tar -xzf sccache.tar.gz
# cp sccache-*/sccache /usr/local/bin/
# displayName: Install sccache (OSX)
# condition: and(succeeded(), eq(variables['Agent.OS'], 'Darwin'))
# - bash: |
# set -e
# curl -Lfo sccache.tar.gz https://github.com/mozilla/sccache/releases/download/0.2.9/sccache-0.2.9-x86_64-unknown-linux-musl.tar.gz
# tar -xzf sccache.tar.gz
# sudo cp sccache-*/sccache /usr/local/bin/
# displayName: Install sccache (Linux)
# condition: and(succeeded(), eq(variables['Agent.OS'], 'Linux'))
# - script: |
# curl -Lfo sccache.tar.gz https://github.com/mozilla/sccache/releases/download/0.2.9/sccache-0.2.9-x86_64-pc-windows-msvc.tar.gz
# tar -xzf sccache.tar.gz
# move sccache-* sccache
# echo "##vso[task.prependpath]%CD%\sccache"
# displayName: Install sccache (Windows)
# condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))
- bash: cargo build --release
displayName: Cargo build
# Test what we're about to release in release mode itself. This tests
# everything except lightbeam which requires nightly which happens above.
- bash: cargo test --release --all --exclude lightbeam --exclude wasmtime-wasi-c
displayName: Cargo test
env:
RUST_BACKTRACE: 1
# - script: sccache --show-stats
# displayName: post-compile sccache stats
- bash: |
echo "##vso[task.setvariable variable=tagName;]`echo $BUILD_SOURCEBRANCH | sed -e 's|refs/tags/||'`"
displayName: Set tag name
condition: startsWith(variables['Build.SourceBranch'], 'refs/tags/')
- bash: |
echo "##vso[task.setvariable variable=tagName;]dev"
displayName: Set tag name to "dev"
condition: not(startsWith(variables['Build.SourceBranch'], 'refs/tags/'))
- bash: echo "##vso[task.setvariable variable=basename;]wasmtime-$(tagName)-x86_64-windows"
displayName: Configure basename var
condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))
- bash: echo "##vso[task.setvariable variable=basename;]wasmtime-$(tagName)-x86_64-apple"
displayName: Configure basename var
condition: and(succeeded(), eq(variables['Agent.OS'], 'Darwin'))
- bash: echo "##vso[task.setvariable variable=basename;]wasmtime-$(tagName)-x86_64-linux"
displayName: Configure basename var
condition: and(succeeded(), eq( variables['Agent.OS'], 'Linux' ))
- bash: |
set -e
mkdir -p $BUILD_BINARIESDIRECTORY/$BASENAME
if [ "$AGENT_OS" = "Windows_NT" ]; then
ext=.exe
fi
cp LICENSE README.md target/release/{wasmtime,wasm2obj}$ext $BUILD_BINARIESDIRECTORY/$BASENAME
displayName: Copy binaries
- bash: |
set -e
export WT_VERSION=`cat Cargo.toml | sed -n 's/^version = "\([^"]*\)".*/\1/p'`
"$WIX/bin/candle" -arch x64 -out target/wasmtime.wixobj installer/msi/wasmtime.wxs
"$WIX/bin/light" -out $BUILD_ARTIFACTSTAGINGDIRECTORY/$(basename).msi target/wasmtime.wixobj -ext WixUtilExtension
rm $BUILD_ARTIFACTSTAGINGDIRECTORY/$(basename).wixpdb
displayName: Create installer (Windows)
condition: eq(variables['Agent.OS'], 'Windows_NT')
- task: ArchiveFiles@2
inputs:
rootFolderOrFile: $(Build.BinariesDirectory)/$(basename)
archiveType: 'zip'
archiveFile: '$(Build.ArtifactStagingDirectory)/$(basename).zip'
displayName: Archive files (Win)
condition: and(succeeded(), eq(variables['Agent.OS'], 'Windows_NT'))
- task: ArchiveFiles@2
inputs:
rootFolderOrFile: $(Build.BinariesDirectory)/$(basename)
archiveType: 'tar'
tarCompression: 'xz'
archiveFile: '$(Build.ArtifactStagingDirectory)/$(basename).tar.xz'
displayName: Archive files (Unix)
condition: and(succeeded(), ne(variables['Agent.OS'], 'Windows_NT'))
- task: PublishPipelineArtifact@1
inputs:
path: $(Build.ArtifactStagingDirectory)/
artifactName: 'bundle-$(Agent.OS)'
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