Move to clang-format-14 for code formatting

14 is the latest version of clang-format that is included in Ubuntu
22.04 which is a Long term Release.

.github/workflows/check-format.yml

@@ -14,12 +14,12 @@ jobs:
   check-format:
     name: Check the code formatting
 
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
 
     steps:
     - uses: actions/checkout@v2
     - name: Install dependencies
-      run: sudo apt-get update -qq && sudo apt-get install -y clang-format-9
+      run: sudo apt-get update -qq && sudo apt-get install -y clang-format-14
     - name: Autogen && configure
       run: |
         ./autogen.sh

configure.ac

@@ -115,9 +115,9 @@ done
 # define an additional recursive make target to format the sources.
 # Also check if clang-format is installed
 AM_EXTRA_RECURSIVE_TARGETS([format-sources])
-# prefer version 9 of clang-format as it is part of any release since ubuntu 20.04
-AC_CHECK_PROGS([SOURCE_FORMATTER], [clang-format-9 clang-format])
-AM_CONDITIONAL([HAVE_SOURCE_FORMATTER], [test x$SOURCE_FORMATTER = xclang-format -o x$SOURCE_FORMATTER = xclang-format-9])
+# prefer version 14 of clang-format as it is part of Ubuntu 22.04 LTS
+AC_CHECK_PROGS([SOURCE_FORMATTER], [clang-format-14 clang-format])
+AM_CONDITIONAL([HAVE_SOURCE_FORMATTER], [test x$SOURCE_FORMATTER = xclang-format -o x$SOURCE_FORMATTER = xclang-format-14])
 
 # GNU help2man creates man pages from --help output; in many cases,
 # this is sufficient, and obviates the need to maintain man pages