negative-zero-fixes.patch

diff --git a/src/backend/utils/adt/geo_ops.c b/src/backend/utils/adt/geo_ops.c
index e0a9a0fa4f..97b3349ff8 100644
--- a/src/backend/utils/adt/geo_ops.c
+++ b/src/backend/utils/adt/geo_ops.c
@@ -1251,6 +1251,14 @@ line_interpt_line(Point *result, LINE *l1, LINE *l2)
 					   float8_mi(float8_mul(l1->A, l2->B),
 								 float8_mul(l2->A, l1->B)));
 		y = float8_div(-float8_pl(float8_mul(l1->A, x), l1->C), l1->B);
+
+		/* on some platforms, the preceding expression tends to produce -0 */
+		if (x == 0.0)
+			x = 0.0;
+
+		/* on some platforms, the preceding expression tends to produce -0 */
+		if (y == 0.0)
+			y = 0.0;
 	}
 	else if (!FPzero(l2->B))
 	{
@@ -1262,6 +1270,14 @@ line_interpt_line(Point *result, LINE *l1, LINE *l2)
 					   float8_mi(float8_mul(l2->A, l1->B),
 								 float8_mul(l1->A, l2->B)));
 		y = float8_div(-float8_pl(float8_mul(l2->A, x), l2->C), l2->B);
+
+		/* on some platforms, the preceding expression tends to produce -0 */
+		if (x == 0.0)
+			x = 0.0;
+
+		/* on some platforms, the preceding expression tends to produce -0 */
+		if (y == 0.0)
+			y = 0.0;
 	}
 	else
 		return false;
@@ -1798,6 +1814,12 @@ point_send(PG_FUNCTION_ARGS)
 static inline void
 point_construct(Point *result, float8 x, float8 y)
 {
+	if (x == 0.0)
+		x = 0.0;
+
+	if (y == 0.0)
+		y = 0.0;
+
 	result->x = x;
 	result->y = y;
 }