MS compatible SEH.
I agree. I did come up with a "compatibility layer" -- nothing fancy just a couple of #defines -- that allowed me to use SEH in my unauthorised version of Devel::Size and compile it with MSVC & Mingw 32 & 64-bit without change.
However, in the subsequent authorised version, they re-wrote all the exception handling claiming that it didn't work on gcc. No details given, so I can't talk to that.
I do know that syphilis compiled it successfully with MinGW and it appeared to work okay. Admittedly, I didn't try to do anything complicated with the exceptions; just basically ignored them.