add --allow-shlib-undefined in link options

.github/workflows/msys.yml

@@ -73,8 +73,8 @@ jobs:
         run: |
           If (Test-Path "C:\_") { rm -r -fo "C:\_" }
           Copy-Item -Path ".\temp" -Destination "C:\_" -Recurse
-      - name: Debug over SSH (tmate)
-        uses: mxschmitt/[email protected]
+      # - name: Debug over SSH (tmate)
+      #   uses: mxschmitt/[email protected]
       - name: CI-Build
         shell: msys2 {0}
         id: build
@@ -83,8 +83,8 @@ jobs:
           unset VCPKG_ROOT
           mkdir build
           cd build
-          cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DGINKGO_BUILD_HWLOC=OFF -DGINKGO_BUILD_EXAMPLES=OFF -DGINKGO_BUILD_TESTS=OFF -DGINKGO_BUILD_BENCHMARKS=OFF -DCMAKE_CXX_FLAGS="-Wl,--allow-shlib-undefined" ..
-          cmake --build --verbose .
+          cmake -G Ninja -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=ON -DGINKGO_BUILD_HWLOC=OFF -DGINKGO_BUILD_EXAMPLES=OFF -DGINKGO_BUILD_TESTS=OFF -DGINKGO_BUILD_BENCHMARKS=OFF ..
+          cmake --build . --verbose
 
       - name: "Clean up runner"
         if: ${{ always() }}

cmake/build_helpers.cmake

@@ -45,6 +45,7 @@ function(ginkgo_compile_features name)
     if (GINKGO_CHECK_CIRCULAR_DEPS)
         target_link_libraries("${name}" PRIVATE "${GINKGO_CIRCULAR_DEPS_FLAGS}")
     endif()
+    target_link_options("${name}" PRIVATE "--allow-shlib-undefined")
 
     set_target_properties("${name}" PROPERTIES POSITION_INDEPENDENT_CODE ON)
 endfunction()