Bring the Multiprocess Rolling File Appender to GitHub CI

… as requested by a Log4cxx maintainer in the Pull Request

Author: RK-BFX

.github/workflows/log4cxx-macos.yml

@@ -31,16 +31,19 @@ jobs:
             cxx: clang++
             odbc: OFF
             qt: ON
+            multiprocess: OFF
           - name: osx-14
             os: macos-14
             cxx: clang++
             odbc: ON
             qt: OFF
+            multiprocess: ON
           - name: osx-g++
             os: macos-latest
             cxx: g++-14
             odbc: OFF
             qt: OFF
+            multiprocess: OFF
 
     steps:
     - uses: actions/checkout@v4
@@ -59,7 +62,13 @@ jobs:
         cd main
         mkdir build
         cd build
-        cmake -DCMAKE_CXX_COMPILER=${{ matrix.cxx }} -DLOG4CXX_ENABLE_ODBC=${{ matrix.odbc }} -DLOG4CXX_CFSTRING=ON -DCMAKE_BUILD_TYPE=Debug ..
+        cmake \
+          -DCMAKE_CXX_COMPILER=${{ matrix.cxx }} \
+          -DLOG4CXX_ENABLE_ODBC=${{ matrix.odbc }} \
+          -DLOG4CXX_MULTIPROCESS_ROLLING_FILE_APPENDER=${{ matrix.multiprocess }} \
+          -DLOG4CXX_CFSTRING=ON \
+          -DCMAKE_BUILD_TYPE=Debug \
+          ..
         cmake --build .
 
     - name: run unit tests