autoconf: Signed Integer Division

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1 13.2.5 Signed Integer Division and Integer Overflow
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1 Overflow in signed integer division is not always harmless: for
1 example, on CPUs of the i386 family, dividing `INT_MIN' by `-1' yields
1 a SIGFPE signal which by default terminates the program.  Worse, taking
1 the remainder of these two values typically yields the same signal on
1 these CPUs, even though the C standard requires `INT_MIN % -1' to yield
1 zero because the expression does not overflow.
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