[Bug c/102661] signed integer overflow not detected in comparison since gcc-8

[lrspam at sfr dot fr via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102661

--- Comment #3 from lrspam at sfr dot fr ---
Thank you Andrew for you answer.
I will therefore use -fwrapv, in order to implement overflow detection the same
way I did with gcc 7.