[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 Nathan Sidwell changed: What|Removed |Added Resolution|--- |FIXED Status|ASSIGNED|RESOLVED --- Comment #18 from Nathan Sidwell --- Fixed e2aa8a5f982 2021-01-11 | libcody: Simplify configure [PR 98414, 98509]
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #17 from Nathan Sidwell --- libcody should be being built with -fno-exceptions -fno-rtti, that it isn;t suggests I'm configuring it wrong.
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 Martin Liška changed: What|Removed |Added Assignee|marxin at gcc dot gnu.org |nathan at gcc dot gnu.org --- Comment #16 from Martin Liška --- Based on Jakub's review, leading that to Nathan.
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 Martin Liška changed: What|Removed |Added Assignee|unassigned at gcc dot gnu.org |marxin at gcc dot gnu.org Status|NEW |ASSIGNED --- Comment #15 from Martin Liška --- I have a fix :)
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #14 from Martin Liška --- When building GCC w/o bootstrap I see that libcody properly sets -fno-rtti: g++ -std=c++11 -g -O2 -fno-enforce-eh-specs -fno-stack-protector -fno-threadsafe-statics -fno-exceptions -fno-rtti -fdebug-prefix-map=/home/marxin/Programming/gcc/libcody/= -W -Wall -include config.h -I/home/marxin/Programming/gcc/libcody \ -MMD -MP -MF packet.d -c -o packet.o /home/marxin/Programming/gcc/libcody/packet.cc But it's not true for --with-build-config=bootstrap-ubsan in stage2: /home/mliska/Programming/gcc/objdir/./prev-gcc/xg++ -B/home/mliska/Programming/gcc/objdir/./prev-gcc/ -B/usr/local/x86_64-pc-linux-gnu/bin/ -nostdinc++ -B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include -I/home/mliska/Programming/gcc/libstdc++-v3/libsupc++ -L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -g -O2 -fno-checking -fsanitize=undefined -DUBSAN_BOOTSTRAP -include config.h -I../../libcody -I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include -I/home/mliska/Programming/gcc/libstdc++-v3/libsupc++ \ -MMD -MP -MF packet.d -c -o packet.o ../../libcody/packet.cc while other gcc/*.o objects have -fno-rtti: /home/mliska/Programming/gcc/objdir/./prev-gcc/xg++ -B/home/mliska/Programming/gcc/objdir/./prev-gcc/ -B/usr/local/x86_64-pc-linux-gnu/bin/ -nostdinc++ -B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -B/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include/x86_64-pc-linux-gnu -I/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/include -I/home/mliska/Programming/gcc/libstdc++-v3/libsupc++ -L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -L/home/mliska/Programming/gcc/objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -fno-PIE -c -g -O2 -fno-checking -fsanitize=undefined -DUBSAN_BOOTSTRAP -DIN_GCC -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-error=format-diag -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -fno-common -DHAVE_CONFIG_H -I. -I. -I../../gcc -I../../gcc/. -I../../gcc/../include -I../../gcc/../libcpp/include -I../../gcc/../libcody -I../../gcc/../libdecnumber -I../../gcc/../libdecnumber/bid -I../libdecnumber -I../../gcc/../libbacktrace -o ipa-icf.o -MT ipa-icf.o -MMD -MP -MF ./.deps/ipa-icf.TPo ../../gcc/ipa-icf.c
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #13 from Jakub Jelinek --- Well, that is a fix for the bootstrap-ubsan issues, but not the above small testcase showing the problems for users. But sure, as this is a problem that exists many years and nobody reported it before, it is enough to fix just the bootstrap-ubsan stuff for GCC 11.
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #12 from Martin Liška --- I've got it! It can be fixed with -fno-rtti and apparently libcody's objects do miss that :)
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #11 from Martin Liška ---
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
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #10 from Martin Liška --- (In reply to Martin Liška from comment #9) > (In reply to Jakub Jelinek from comment #8) > > I don't. LIBUBSAN_SPEC comes from gcc.c, while the libstdc++ stuff comes > > from cp/g++spec.c and the ordering between the two is hard to achieve, plus > > it is unclear if we shouldn't for -static-libubsan instead just add another > > -lstdc++ copy (but one honoring -static-libstdc++). > > Hm, and what about something like that: > > diff --git a/config/bootstrap-ubsan.mk b/config/bootstrap-ubsan.mk > index 1d85fe1c836..b2a474ae158 100644 > --- a/config/bootstrap-ubsan.mk > +++ b/config/bootstrap-ubsan.mk > @@ -2,7 +2,7 @@ > > STAGE2_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP > STAGE3_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP > -POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan > -DUBSAN_BOOTSTRAP \ > +POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -lstdc++ > -DUBSAN_BOOTSTRAP \ > -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ \ > -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/ \ > -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/.libs That's not going to work: ./xgcc -B./ -B/usr/local/x86_64-pc-linux-gnu/bin/ -isystem /usr/local/x86_64-pc-linux-gnu/include -isystem /usr/local/x86_64-pc-linux-gnu/sys-include -L/home/mliska/Programming/gcc/objdir/gcc/../ld -xc++ -nostdinc /dev/null -S -o /dev/null -fself-test=../../gcc/testsuite/selftests ./cc1./cc1plus: : /usr/lib64/libstdc++.so.6/usr/lib64/libstdc++.so.6: : version `GLIBCXX_3.4.29' not found (required by ./cc1)version `GLIBCXX_3.4.29' not found (required by ./cc1plus) leaving to Nathan.
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #9 from Martin Liška --- (In reply to Jakub Jelinek from comment #8) > I don't. LIBUBSAN_SPEC comes from gcc.c, while the libstdc++ stuff comes > from cp/g++spec.c and the ordering between the two is hard to achieve, plus > it is unclear if we shouldn't for -static-libubsan instead just add another > -lstdc++ copy (but one honoring -static-libstdc++). Hm, and what about something like that: diff --git a/config/bootstrap-ubsan.mk b/config/bootstrap-ubsan.mk index 1d85fe1c836..b2a474ae158 100644 --- a/config/bootstrap-ubsan.mk +++ b/config/bootstrap-ubsan.mk @@ -2,7 +2,7 @@ STAGE2_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP STAGE3_CFLAGS += -fsanitize=undefined -DUBSAN_BOOTSTRAP -POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -DUBSAN_BOOTSTRAP \ +POSTSTAGE1_LDFLAGS += -fsanitize=undefined -static-libubsan -lstdc++ -DUBSAN_BOOTSTRAP \ -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ \ -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/ \ -B$$r/prev-$(TARGET_SUBDIR)/libsanitizer/ubsan/.libs
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #8 from Jakub Jelinek --- I don't. LIBUBSAN_SPEC comes from gcc.c, while the libstdc++ stuff comes from cp/g++spec.c and the ordering between the two is hard to achieve, plus it is unclear if we shouldn't for -static-libubsan instead just add another -lstdc++ copy (but one honoring -static-libstdc++).
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #7 from Martin Liška --- All right, the linker command line is: /home/marxin/Programming/testcases//objdir/./prev-gcc/collect2 -plugin /home/marxin/Programming/testcases//objdir/./prev-gcc/liblto_plugin.so -plugin-opt=/home/marxin/Programming/testcases//objdir/./prev-gcc/lto-wrapper -plugin-opt=-fresolution=cc1plus.res -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_eh -plugin-opt=-pass-through=-lc -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_eh --eh-frame-hdr -m elf_x86_64 -export-dynamic -dynamic-linker /lib64/ld-linux-x86-64.so.2 -o cc1plus /usr/lib/../lib64/crt1.o /usr/lib/../lib64/crti.o /home/marxin/Programming/testcases//objdir/./prev-gcc/crtbegin.o -L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -L./../zlib -L/home/marxin/Programming/testcases//objdir/./prev-gcc -L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/src/.libs -L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libstdc++-v3/libsupc++/.libs -L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libsanitizer -L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libsanitizer/ubsan -L/home/marxin/Programming/testcases//objdir/prev-x86_64-pc-linux-gnu/libsanitizer/ubsan/.libs -L/lib/../lib64 -L/usr/lib/../lib64 cp/cp-lang.o c-family/stub-objc.o cp/call.o cp/class.o cp/constexpr.o cp/constraint.o cp/coroutines.o cp/cp-gimplify.o cp/cp-objcp-common.o cp/cp-ubsan.o cp/cvt.o cp/cxx-pretty-print.o cp/decl.o cp/decl2.o cp/dump.o cp/error.o cp/except.o cp/expr.o cp/friend.o cp/init.o cp/lambda.o cp/lex.o cp/logic.o cp/mangle.o mapper-resolver.o cp/method.o cp/module.o cp/name-lookup.o cp/optimize.o cp/parser.o cp/pt.o cp/ptree.o cp/rtti.o cp/search.o cp/semantics.o cp/tree.o cp/typeck.o cp/typeck2.o cp/vtable-class-hierarchy.o attribs.o incpath.o c-family/c-common.o c-family/c-cppbuiltin.o c-family/c-dump.o c-family/c-format.o c-family/c-gimplify.o c-family/c-indentation.o c-family/c-lex.o c-family/c-omp.o c-family/c-opts.o c-family/c-pch.o c-family/c-ppoutput.o c-family/c-pragma.o c-family/c-pretty-print.o c-family/c-semantics.o c-family/c-ada-spec.o c-family/c-ubsan.o c-family/known-headers.o c-family/c-attribs.o c-family/c-warn.o c-family/c-spellcheck.o i386-c.o glibc-c.o cc1plus-checksum.o libbackend.a main.o libcommon-target.a libcommon.a ../libcpp/libcpp.a ../libcody/libcody.a ../libdecnumber/libdecnumber.a libcommon.a ../libcpp/libcpp.a ../libbacktrace/.libs/libbacktrace.a ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a -lmpc -lmpfr -lgmp -lz -Bstatic -lstdc++ -Bdynamic -lm -Bstatic -lubsan -Bdynamic -ldl -lrt -lpthread -lm -lgcc -lgcc_eh -lc -lgcc -lgcc_eh /home/marxin/Programming/testcases//objdir/./prev-gcc/crtend.o /usr/lib/../lib64/crtn.o when I replace -Bstatic -lstdc++ .. -Bstatic -lubsan with: -Bstatic -lubsan -Bstatic -lstdc++ it works.
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414
--- Comment #6 from Martin Liška ---
I replaced cp/mapper-client.o cp/mapper-resolver.o just with:
$ cat mapper-resolver.ii
namespace Cody {
enum class Flags : unsigned;
class Resolver {
virtual int IncludeTranslateRequest(int *s, Flags flags, int );
};
} // namespace Cody
class module_resolver : public Cody::Resolver {
virtual int IncludeTranslateRequest(int *s, Cody::Flags,
int ) override;
private:
};
int module_resolver::IncludeTranslateRequest(int *s, Cody::Flags,
int ) {}
which needs the symbol:
nm mapper-resolver.o
...
U _ZTVN10__cxxabiv120__si_class_type_infoE
Jakub: Does it confirm your description. Do you know how to fix that?
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #5 from Jakub Jelinek --- Likely it just is the first TU that needs -fsanitize=vptr sanitization... Seems -lubsan comes after -lstdc++ when linking with -fsanitize=undefined -static-libstdc++ -static-libubsan so if the vptr checking code needs to be linked, it isn't satisfied.
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 --- Comment #4 from Nathan Sidwell --- there isn't a dynamic cast in the mapper (or libcody)
[Bug bootstrap/98414] [11 Regression] UBSAN bootstrap is broken: ubsan/ubsan_type_hash_itanium.cpp:162: undefined reference to `__dynamic_cast' since r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98414 Martin Liška changed: What|Removed |Added Summary|[11 Regression] UBSAN |[11 Regression] UBSAN |bootstrap is broken:|bootstrap is broken: |ubsan/ubsan_type_hash_itani |ubsan/ubsan_type_hash_itani |um.cpp:162: undefined |um.cpp:162: undefined |reference to|reference to |`__dynamic_cast'|`__dynamic_cast' since ||r11-6083-gb7dfc2074c78415d4 ||51eb34d1608016c80b1c41a Keywords|needs-bisection | CC||nathan at gcc dot gnu.org --- Comment #3 from Martin Liška --- So it started when c++ module mapper was added: r11-6083-gb7dfc2074c78415d451eb34d1608016c80b1c41a
