test gcc-14 on ubuntu

azure-pipelines.yml

@@ -22,6 +22,10 @@ jobs:
       Linux_amd64:
         vmImage: 'ubuntu-20.04'
         CPU: amd64
+
+      Linux_amd64_gcc14:
+        vmImage: 'ubuntu-latest'
+        CPU: amd64
       # regularly breaks, refs bug #17325
 #       Linux_i386:
 #         # on 'ubuntu-16.04' (not supported anymore anyways) it errored with:
@@ -87,6 +91,14 @@ jobs:
       displayName: 'Install dependencies (amd64 Linux)'
       condition: and(succeeded(), eq(variables['skipci'], 'false'), eq(variables['Agent.OS'], 'Linux'), eq(variables['CPU'], 'amd64'))
 
+    - bash: |
+        sudo add-apt-repository ppa:ubuntu-toolchain-r/test
+        sudo apt-get update
+        sudo apt-get install gcc-14 g++-14
+        sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-14 60 --slave /usr/bin/g++ g++ /usr/bin/g++-14
+      displayName: 'Install dependencies (amd64 Linux gcc 14)'
+      condition: and(succeeded(), eq(variables['skipci'], 'false'), eq(variables['Agent.OS'], 'Linux'), eq(variables['vmImage'], 'ubuntu-latest'))
+
     - bash: |
         set -e
         . ci/funs.sh