* Jonathan Wakely via Gcc-help:
> On Tue, 17 Nov 2020 at 18:58, David Hagood via Gcc-help
> <gcc-help@xxxxxxxxxxx> wrote:
>>
>> You are squarely into "undefined behavior" territory here:
>>
>>
>> > static int throw314()
>> > {
>> > std::cout << "throw314() called\n" << std::flush;
>> > throw 3.14f;
>> > }
>> >
>> > static int throwDuringInitialization = throw314();
>>
>> You are throwing from a constructor. That's STRONGLY discouraged - it
>
> No it isn't.
>
>> leads to undefined behavior,
>
> No it doesn't.
The code throws from an *ELF* constructor (although it uses a C++
constructor to achieve this). This is currently not supported by the
glibc implementation.
It's possible to correct this. A really clean solution would require
that we move the unwinder into glibc. Maybe it is possible to get the
desired effect by using the unwinder that was just loaded to catch the
exception, but that seems rather tricky.
