I compiled the following cpp file with `-fsantize=vptr -static'. struct A { virtual ~A() {}; }; int main() { A a; } There would have the following output error: /usr/lib/gcc/x86_64-linux-gnu/7/libubsan.a(ubsan_type_hash_itanium.o): In function `isDerivedFromAtOffset(__cxxabiv1::__class_type_info const*, __cxxabiv1::__class_type_info const*, long)': (.text+0x52): undefined reference to `__dynamic_cast' (.text+0x5e): undefined reference to `typeinfo for __cxxabiv1::__vmi_class_type_info' (.text+0x6b): undefined reference to `__dynamic_cast' /usr/lib/gcc/x86_64-linux-gnu/7/libubsan.a(ubsan_type_hash_itanium.o): In function `findBaseAtOffset(__cxxabiv1::__class_type_info const*, long)': (.text+0x151): undefined reference to `__dynamic_cast' (.text+0x15d): undefined reference to `typeinfo for __cxxabiv1::__vmi_class_type_info' (.text+0x16a): undefined reference to `__dynamic_cast' /usr/lib/gcc/x86_64-linux-gnu/7/libubsan.a(ubsan_type_hash_itanium.o): In function `__ubsan::checkDynamicType(void*, void*, unsigned long)': (.text+0x293): undefined reference to `__dynamic_cast' There has a same result with gcc11.0.0. Is it a correct behavior for C++? Best Regard, Eddie Kuo CONFIDENTIALITY NOTICE: This e-mail (and its attachments) may contain confidential and legally privileged information or information protected from disclosure. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein is strictly prohibited. In this case, please immediately notify the sender by return e-mail, delete the message (and any accompanying documents) and destroy all printed hard copies. Thank you for your cooperation. Copyright ANDES TECHNOLOGY CORPORATION - All Rights Reserved.