Build GCC 11.4.0 for steam-runtime scout

Author: danielga

azure-pipelines.yml

@@ -0,0 +1,56 @@
+trigger:
+  batch: true
+  branches:
+    include:
+    - 'gcc-build'
+  tags:
+    include:
+    - 'gcc-build/*'
+jobs:
+- job: gcc_build
+  displayName: Build GCC 11.4.0 compiler for steam-runtime scout
+  pool:
+    name: Azure Pipelines
+    vmImage: ubuntu-22.04
+  container:
+    image: danielga/steamrt-scout:latest
+    options: -v /home
+  timeoutInMinutes: 180
+  steps:
+  - checkout: self
+    clean: true
+    fetchDepth: 1
+    submodules: recursive
+  - bash: 'build/gcc_build.sh 11.4.0'
+    displayName: Build
+  - task: CopyFiles@2
+    displayName: 'Copy files to $(Build.ArtifactStagingDirectory)'
+    inputs:
+      SourceFolder: '$(System.DefaultWorkingDirectory)'
+      Contents: 'gcc-*.tar.xz'
+      TargetFolder: '$(Build.ArtifactStagingDirectory)'
+      CleanTargetFolder: true
+      flattenFolders: true
+      preserveTimestamp: true
+  - publish: '$(Build.ArtifactStagingDirectory)'
+    displayName: 'Publish build artifacts'
+    artifact: gcc_build
+- job: publish
+  displayName: Publish to GitHub Releases
+  pool:
+    name: Azure Pipelines
+    vmImage: ubuntu-22.04
+  timeoutInMinutes: 10
+  dependsOn:
+    - gcc_build
+  condition: and(succeeded(), startsWith(variables['Build.SourceBranch'], 'refs/tags/'))
+  steps:
+  - download: current
+    patterns: 'gcc-*.tar.xz'
+  - task: GitHubRelease@1
+    displayName: 'Publish GitHub release $(build.sourceBranchName)'
+    inputs:
+      gitHubConnection: 'GitHub danielga'
+      releaseNotesSource: inline
+      assets: '$(Pipeline.Workspace)/gcc-*.tar.xz'
+      addChangeLog: false

build/gcc_build.sh

@@ -0,0 +1,85 @@
+#!/bin/bash
+
+set -euxo pipefail
+
+# Don't use with versions prior to GCC 9!
+version="${1:-11.4.0}"
+major_version=`echo "$version" | cut -d. -f1`
+
+sudo apt-get -y install wget flex texinfo build-essential m4 bison
+
+if [ ! -f "gcc-${version}.tar.xz" ]; then
+	wget "http://ftp.gnu.org/gnu/gcc/gcc-${version}/gcc-${version}.tar.xz"
+fi
+
+if [ ! -d "gcc-${version}" ]; then
+	tar -xf "gcc-${version}.tar.xz"
+fi
+
+pushd "gcc-${version}"
+
+contrib/download_prerequisites
+
+if [ "$major_version" -ge "11" ]; then
+	# Patch dwarf_version to default to 4 instead of 5, since steam-runtime's ld doesn't support DWARF 5.
+	# This build of GCC will still support -gdwarf-5, but that's up to the user.
+	patch -u -p0 -N << EOF
+--- gcc/common.opt	2021-09-29 17:10:59.793270902 +0100
++++ gcc/common.opt	2021-09-29 16:46:44.733263653 +0100
+@@ -3175,7 +3175,7 @@
+ Generate debug information in default version of DWARF format.
+ 
+ gdwarf-
+-Common Driver Joined UInteger Var(dwarf_version) Init(5) Negative(gstabs)
++Common Driver Joined UInteger Var(dwarf_version) Init(4) Negative(gstabs)
+ Generate debug information in DWARF v2 (or later) format.
+ 
+ gdwarf32
+EOF
+fi
+
+rm -rf build/
+mkdir build
+pushd build
+
+export CC=gcc-9
+export CXX=g++-9
+export AR=gcc-ar-9
+export NM=gcc-nm-9
+export RANLIB=gcc-ranlib-9
+
+core_count=`getconf _NPROCESSORS_ONLN`
+double_core_count="$(( core_count * 2 ))"
+
+../configure -v --with-pkgversion="SteamRT ${version}-1+steamrt1.3+srt1" \
+	--enable-languages=c,c++,fortran,lto,objc,obj-c++ \
+	--prefix="/usr/lib/gcc-${major_version}" --with-gcc-major-version-only \
+	--program-prefix= --program-suffix="-${major_version}" --enable-shared \
+	--enable-linker-build-id --with-pic --enable-nls --enable-clocale=gnu \
+	--enable-libstdcxx-debug --enable-libstdcxx-time=yes \
+	--with-default-libstdcxx-abi=gcc4-compatible --disable-libstdcxx-dual-abi \
+	--enable-gnu-unique-object --disable-vtable-verify --enable-plugin --enable-default-pie \
+	--with-system-zlib --enable-multiarch --disable-werror --with-arch-32=i686 \
+	--with-abi=m64 --with-multilib-list=m32,m64 --enable-multilib --with-tune=generic \
+	--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu \
+	--target=x86_64-linux-gnu
+make -j "$double_core_count"
+sudo make install-strip
+
+popd
+
+popd
+
+sudo mkdir -p "/usr/lib/gcc-${major_version}/lib32/backup"
+sudo mv "/usr/lib/gcc-${major_version}/lib32/"*.so* "/usr/lib/gcc-${major_version}/lib32/backup"
+
+sudo mkdir -p "/usr/lib/gcc-${major_version}/lib32/debug/backup"
+sudo mv "/usr/lib/gcc-${major_version}/lib32/debug/"*.so* "/usr/lib/gcc-${major_version}/lib32/debug/backup"
+
+sudo mkdir -p "/usr/lib/gcc-${major_version}/lib64/backup"
+sudo mv "/usr/lib/gcc-${major_version}/lib64/"*.so* "/usr/lib/gcc-${major_version}/lib64/backup"
+
+sudo mkdir -p "/usr/lib/gcc-${major_version}/lib64/debug/backup"
+sudo mv "/usr/lib/gcc-${major_version}/lib64/debug/"*.so* "/usr/lib/gcc-${major_version}/lib64/debug/backup"
+
+tar -cvJf "gcc-${version}.tar.xz" "/usr/lib/gcc-${major_version}"