mdbx-cmake: add workaround for LCC 1.25 bug of class inline static constexpr member field definition.

CMakeLists.txt

@@ -613,6 +613,10 @@ macro(libmdbx_setup_libs TARGET MODE)
     target_link_libraries(${TARGET} ${MODE} log)
   endif()
   if(LIBCXX_FILESYSTEM AND MDBX_BUILD_CXX)
+    if(CMAKE_COMPILER_IS_ELBRUSCXX AND CMAKE_CXX_COMPILER_VERSION VERSION_LESS 1.26.0
+        AND NOT CMAKE_VERSION VERSION_LESS 3.13)
+      target_link_options(${TARGET} PUBLIC "-Wl,--allow-multiple-definition")
+    endif()
     target_link_libraries(${TARGET} PUBLIC ${LIBCXX_FILESYSTEM})
   endif()
 endmacro()