--- winpthreads/src/libgcc/dll_math.c	2013-04-10 20:11:34.000000000 +0200
+++ winpthreads/src/libgcc/dll_math.c	2017-05-31 13:02:25.869883546 +0200
@@ -120,6 +120,7 @@
 u_quad_t	__udivdi3(u_quad_t a, u_quad_t b);
 u_quad_t	__umoddi3(u_quad_t a, u_quad_t b);
 int		__ucmpdi2(u_quad_t a, u_quad_t b);
+quad_t __divmoddi4(quad_t a, quad_t b, quad_t *rem);
 
 #endif /* !_LIBKERN_QUAD_H_ */
 
@@ -546,6 +547,31 @@
 	(void)__qdivrem(a, b, &r);
 	return (r);
 }
+
+/*
+ * Divide two signed quads.
+ * This function is new in GCC 7.
+ */
+quad_t
+__divmoddi4(a, b, rem)
+       quad_t a, b, *rem;
+{
+       u_quad_t ua, ub, uq, ur;
+       int negq, negr;
+
+       if (a < 0)
+               ua = -(u_quad_t)a, negq = 1, negr = 1;
+       else
+               ua = a, negq = 0, negr = 0;
+       if (b < 0)
+               ub = -(u_quad_t)b, negq ^= 1;
+       else
+               ub = b;
+       uq = __qdivrem(ua, ub, &ur);
+       if (rem)
+               *rem = (negr ? -ur : ur);
+       return (negq ? -uq : uq);
+}
 #else
 static int __attribute__((unused)) dummy;
 #endif /*deined (_X86_) && !defined (__x86_64__)*/