Try the same trick we use with geogram for Windows .lib

manifold/CMakeLists.txt

@@ -42,6 +42,7 @@ if (ENABLE_MANIFOLD)
     -DCMAKE_INSTALL_PREFIX=${CMAKE_BUNDLE_INSTALL_PREFIX}
     -DCMAKE_INSTALL_LIBDIR:PATH=${LIB_DIR}
     -DCMAKE_INSTALL_RPATH=${CMAKE_BUNDLE_INSTALL_PREFIX}/${LIB_DIR}
+    -DCMAKE_WINDOWS_EXPORT_ALL_SYMBOLS=ON
     LOG_CONFIGURE ${EXT_BUILD_QUIET}
     LOG_BUILD ${EXT_BUILD_QUIET}
     LOG_INSTALL ${EXT_BUILD_QUIET}