ci: produce statically linked build on MSYS2

Not just the C++ standard library but all libraries are now
statically linked. Due to the inclusion of Boost Process the
partially statically linked build included standard libraries,
because the Boost library is dynamically linked by default.

Author: striezel

.github/workflows/msys2.yml

@@ -54,17 +54,17 @@ jobs:
 #          export MSYSTEM=$(echo ${{matrix.msystem}} | tr '[:lower:]' '[:upper:]')
 #          cd "$GITHUB_WORKSPACE"/build
 #          ctest -V
-      - name: Build with statically linked standard libraries
+      - name: Build statically linked executable
         run: |
           export MSYSTEM=$(echo ${{matrix.msystem}} | tr '[:lower:]' '[:upper:]')
           export CXX=g++
           export CC=gcc
           cd "$GITHUB_WORKSPACE"
-          mkdir build_static_std_libs
-          cd build_static_std_libs
-          cmake ../ -DENABLE_LTO=ON -DENABLE_STATIC_STANDARD_LIBRARIES=ON
+          mkdir build-static
+          cd build-static
+          cmake ../ -DENABLE_LTO=ON -DENABLE_STATIC_LINKING=ON
           cmake --build . -j4
-#      - name: Tests of build with statically linked standard libraries
+#      - name: Tests of build with statically linked build
 #        run: |
 #          export MSYSTEM=$(echo ${{matrix.msystem}} | tr '[:lower:]' '[:upper:]')
 #          cd "$GITHUB_WORKSPACE"/build_static_std_libs
@@ -75,7 +75,7 @@ jobs:
           cd "$GITHUB_WORKSPACE"
           mkdir artifacts
           # binary files
-          ./ci/copy-dll-dependencies.sh build_static_std_libs/code/pmdb.exe artifacts/
+          ./ci/copy-dll-dependencies.sh build-static/code/pmdb.exe artifacts/
           # license + third-party notices
           cp LICENSE artifacts/
           cp third-party.md artifacts/