move cflags set to make passing strings easier

Signed-off-by: Kimball Thurston <kdt3rd@gmail.com>

Author: kdt3rd

.github/workflows/ci_steps.yml

@@ -153,11 +153,6 @@ jobs:
                  -DILMTHREAD_NAMESPACE=${{ inputs.namespace }} \
                  -DIEX_NAMESPACE=${{ inputs.namespace }}"
           fi
-          if [ "${{ inputs.msystem }}" == "MINGW32" ]; then
-              CMAKE_ARGS="$CMAKE_ARGS \
-                 -DCMAKE_C_FLAGS=\\'-msse2 -mfpmath=sse\\' \
-                 -DCMAKE_CXX_FLAGS=\\'-msse2 -mfpmath=sse\\'"
-          fi
 
           echo "CMAKE_ARGS=$CMAKE_ARGS" >> $GITHUB_ENV
 
@@ -183,7 +178,12 @@ jobs:
         if: inputs.msystem != ''
         run: |
           cmake --version
-          cmake $CMAKE_ARGS
+          if [ "${{ inputs.msystem }}" == "MINGW32" ]; then
+            cmake $CMAKE_ARGS -DCMAKE_C_FLAGS='-msse2 -mfpmath=sse' \
+              -DCMAKE_CXX_FLAGS='-msse2 -mfpmath=sse'
+          else
+            cmake $CMAKE_ARGS
+          fi
           cmake --build . --target install --config ${{ inputs.build-type }}
           if [ "${{ inputs.BUILD_TESTING }}" == "ON" ]; then
             ctest -T Test -C ${{ inputs.build-type }} --timeout 7200 --output-on-failure -VV