if ( BUILD_LIB_IBPP )
add_library ( ibpp STATIC ibpp/all_in_one.cpp )
target_include_directories ( ibpp PUBLIC ibpp/include )
+ target_compile_options ( ibpp PRIVATE -Wno-old-style-cast $<$<CXX_COMPILER_ID:GNU>:-Wno-useless-cast> )
endif ( BUILD_LIB_IBPP )
if ( BUILD_LIB_JSON )