add additional cxxflags for arm builds

Author: anonrig

.github/workflows/ubuntu.yml

@@ -23,9 +23,10 @@ concurrency:
 jobs:
   ubuntu-build:
     strategy:
+      fail-fast: false
       matrix:
         shared: [ON, OFF]
-        cxx: [g++-12, clang++-14]
+        cxx: [g++-12, clang++-15]
         runs-on: [ubuntu-22.04, ubuntu-22.04-arm]
     runs-on: ${{matrix.runs-on}}
     steps: