Re: Autoconf manual's coverage of signed integer overflow & portability

[Andrew Haley]

Andrew Pinski writes:
 > 
 > This will always cause a trap on x86, even with -fwrapv so really
 > -fwrapv has a bug on x86.  I will file this bug sometime later
 > tomorrow.  Oh and fixing this bug will actually slow down users
 > of -fwrapv even more than what it is currently does because
 > you can no longer use the div instruction.

Actually, you can still use div, but it's rather tricky.  There's some
code in libgcj to handle this very situation.

Andrew.