https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63781
--- Comment #7 from howarth at bromo dot med.uc.edu --- (In reply to howarth from comment #6) > Okay, I see the missing linkage on libstdc++ is intentional... > > # Force link with C, not C++. For now, while we're using C++ we don't > # want or need libstdc++. > libitm_la_DEPENDENCIES = $(libitm_version_dep) > libitm_la_LINK = $(LINK) $(libitm_la_LDFLAGS) > libitm_la_LDFLAGS = $(libitm_version_info) $(libitm_version_script) > On reflection, if this were true shouldn't there be no undefined symbols from libstdc++ present in the libitm shared library?