From bb080b5445ce35d6f2f34693aefc09338f814b43 Mon Sep 17 00:00:00 2001
From: Dirk Stolle <striezel-dev@web.de>
Date: Thu, 7 Apr 2022 13:49:02 +0200
Subject: [PATCH] ci: Replace Ubuntu 16.04 with Ubuntu 18.04 in some GitHub
 Actions jobs (#640)

* Replace Ubuntu 16.04 with Ubuntu 18.04 in GitHub Actions

Ubuntu 16.04 is no longer available for GitHub Actions,
because support for it has ended. Some older Clang versions
seem to be unavailable in the APT repostiry, so those are not
changed to 18.04 by intention.

* Replace Ubuntu 16.04 with Ubuntu 18.04 in Azure Pipelines
---
 .azure-pipelines.yml     | 8 ++++----
 .github/workflows/ci.yml | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/.azure-pipelines.yml b/.azure-pipelines.yml
index bf35a61860..a905ccbe1b 100644
--- a/.azure-pipelines.yml
+++ b/.azure-pipelines.yml
@@ -15,9 +15,9 @@ trigger:
   - ml/*
 
 jobs:
-  - job: 'ubuntu1604_gcc6_cxx14_cmake'
+  - job: 'ubuntu1804_gcc6_cxx14_cmake'
     pool:
-      vmImage: 'ubuntu-16.04'
+      vmImage: 'ubuntu-18.04'
     steps:
       - template: .ci/azure-pipelines/steps-install-gcc.yml
         parameters:
@@ -34,9 +34,9 @@ jobs:
         parameters:
           cxxver: '14'
 
-  - job: 'ubuntu1604_gcc8_cxx14_cmake'
+  - job: 'ubuntu1804_gcc8_cxx14_cmake'
     pool:
-      vmImage: 'ubuntu-16.04'
+      vmImage: 'ubuntu-18.04'
     steps:
       - template: .ci/azure-pipelines/steps-install-gcc.yml
         parameters:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1e6c356e4a..cf385d698f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
         include:
           - toolset: gcc-6
             cxxstd: "11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: g++-6
           - toolset: gcc-7
             cxxstd: "11,14,17"
@@ -62,17 +62,17 @@ jobs:
           - toolset: clang
             compiler: clang++-3.9
             cxxstd: "11,14"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: clang-3.9
           - toolset: clang
             compiler: clang++-4.0
             cxxstd: "11,14"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: clang-4.0
           - toolset: clang
             compiler: clang++-5.0
             cxxstd: "11,14,1z"
-            os: ubuntu-16.04
+            os: ubuntu-18.04
             install: clang-5.0
           - toolset: clang
             compiler: clang++-6.0