https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61372
--- Comment #5 from David Crocker <dcrocker at eschertech dot com> --- You seem to be assuming that C++ exceptions can propagate through functions compiled with a C compiler. On most platforms, they normally cannot, because a C compiler does not produce the information needed for the C++ unwind mechanism to unwind the call stack. If you want bsearch and qsort to propagate C++ exceptions, on most platforms the implementations of those functions would have to be compiled either using a C++ compiler, or with a C compiler using a special option that tells the compiler to include the tables and/or code needed to propagate C++ exceptions. Otherwise the exception will end up at std::unexpected. Maybe bsearch and qsort in newlib are compiled this way, I haven't checked. I don't care whether extern "C" functions are to be assumed noexcept by default or another compiler option is needed to specify that. But without this facility, the proposed warning will be useless in practice, at least for people like me writing embedded software.
