Some Google(tm)ing does turn up plenty of other people complaining about similar behaviour. This report seems to have the most enlightening response:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=54561 Perhaps Clang has a more useful warning?
- [HACKERS] longjmp clobber warnings are utterly brok... Tom Lane
- Re: [HACKERS] longjmp clobber warnings are utt... Greg Stark
- Re: [HACKERS] longjmp clobber warnings are... Tom Lane
- Re: [HACKERS] longjmp clobber warnings... Andres Freund
- Re: [HACKERS] longjmp clobber warnings are utt... Martijn van Oosterhout
- Re: [HACKERS] longjmp clobber warnings are... Tom Lane
- Re: [HACKERS] longjmp clobber warnings... Martijn van Oosterhout
- Re: [HACKERS] longjmp clobber warn... Tom Lane
- Re: [HACKERS] longjmp clobber warn... Heikki Linnakangas
- Re: [HACKERS] longjmp clobber... Tom Lane
- Re: [HACKERS] longjmp clobber warnings are utt... Andres Freund
