Fix: ci.yml for Darwin with llvm-21

Author: ClausKlein

.github/workflows/ci.yml

@@ -2,12 +2,12 @@ name: Continuous Integration
 
 on:
   push:
-    branches:
-      - '**'  # run on all branches
+    branches: [ main, develop ]
   pull_request:
+    branches: [ develop ]
   workflow_dispatch:
   schedule:
-    - cron: "0 0 * * 0"  # Every Sunday at 00:00 UTC
+    - cron: "30 15 * * 0"  # Every Sunday at 15:30 UTC
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
@@ -161,13 +161,13 @@ jobs:
       uses: actions/setup-python@v5
       with: { python-version: "3.13" }
 
-    - name: Install llvm-20
+    - name: Install llvm
       if: matrix.os == 'macos-15'
       run: |
         brew install gcovr cmake ninja llvm
-        export PATH=$(brew --prefix llvm@20)/bin:$PATH && echo "PATH=$PATH" >> $GITHUB_ENV
-        export LDFLAGS=-L$(brew --prefix llvm@20)/lib/c++ -lc++abi -lc++ && echo "LDFLAGS=$LDFLAGS" >> $GITHUB_ENV
-        echo "CXX=clang++-20" >> $GITHUB_ENV
+        export PATH=$(brew --prefix llvm)/bin:$PATH && echo "PATH=$PATH" >> $GITHUB_ENV
+        export LDFLAGS=-L$(brew --prefix llvm)/lib/c++ -lc++abi -lc++ && echo "LDFLAGS=$LDFLAGS" >> $GITHUB_ENV
+        echo "CXX=clang++" >> $GITHUB_ENV
 
     - name: Setup Cpp
       if: matrix.os == 'ubuntu-24.04'

.github/workflows/clang.yml

@@ -7,7 +7,7 @@ on:
     branches: [ develop ]
   workflow_dispatch:
   schedule:
-    - cron: '30 15 * * 6'
+    - cron: "30 15 * * 0"  # Every Sunday at 15:30 UTC
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}

.github/workflows/gcc.yml

@@ -7,7 +7,7 @@ on:
     branches: [ develop ]
   workflow_dispatch:
   schedule:
-    - cron: '30 15 * * 6'
+    - cron: "30 15 * * 0"  # Every Sunday at 15:30 UTC
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}