https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #11 from Martin Liška <marxin at gcc dot gnu.org> --- There's a self-container test-case: $ cat resolver.ii class Resolver { int GetCMIName(); virtual char GetCMISuffix() { return 'c'; } }; int Resolver::GetCMIName() { GetCMISuffix(); return 0; } int main() {} $ -static-libstdc++ -static-libgcc -fsanitize=undefined -static-libubsan [fine] $ g++ -fsanitize=undefined resolver.ii -static-libstdc++ -static-libubsan /usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /usr/lib64/gcc/x86_64-suse-linux/10/libubsan.a(ubsan_type_hash_itanium.o): in function `findBaseAtOffset(__cxxabiv1::__class_type_info const*, long)': /home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:161: undefined reference to `__dynamic_cast' /usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:165: undefined reference to `typeinfo for __cxxabiv1::__vmi_class_type_info' /usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:165: undefined reference to `__dynamic_cast' /usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /usr/lib64/gcc/x86_64-suse-linux/10/libubsan.a(ubsan_type_hash_itanium.o): in function `isDerivedFromAtOffset(__cxxabiv1::__class_type_info const*, __cxxabiv1::__class_type_info const*, long)': /home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:124: undefined reference to `__dynamic_cast' /usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:128: undefined reference to `typeinfo for __cxxabiv1::__vmi_class_type_info' /usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:128: undefined reference to `__dynamic_cast' /usr/lib64/gcc/x86_64-suse-linux/10/../../../../x86_64-suse-linux/bin/ld: /usr/lib64/gcc/x86_64-suse-linux/10/libubsan.a(ubsan_type_hash_itanium.o): in function `__ubsan::checkDynamicType(void*, void*, unsigned long)': /home/abuild/rpmbuild/BUILD/gcc-10.2.1+git1030/obj-x86_64-suse-linux/x86_64-suse-linux/libsanitizer/ubsan/../../../../libsanitizer/ubsan/ubsan_type_hash_itanium.cpp:231: undefined reference to `__dynamic_cast' collect2: error: ld returned 1 exit status