While trying to compile PPL using a gcc that targets Win64, an autoconf test for a "remainder" bug fails.  The test basically tries to compute INT_MIN % -1.  The program compiles cleanly, but execution results in a crash with exit code 149.  The compile line is without any -O optimization, and with a single -f option:

g++ -frounding-math a.cpp

 The test is as follows:

#include <climits>

int minus_one(int n) {
   return (n+1)*(n-1)-n*n;
}

int p(int x, int y) {
   int z = x % y;
   return z;
}

int main(int argc, char** argv) {
   if (p(INT_MIN, minus_one(argc)) != 0)
     return 1;
   else
     return 0;
}