From 5a67d0e183d1342a4bebf0780365dd172dea9a5c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Luk=C3=A1=C5=A1=20Hejl?= <hejl.lukas@gmail.com>
Date: Thu, 5 May 2022 13:52:52 +0200
Subject: [PATCH] Fixed build on Linux (GCC 11.2).

---
 src/libslic3r/Geometry/ConvexHull.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/libslic3r/Geometry/ConvexHull.hpp b/src/libslic3r/Geometry/ConvexHull.hpp
index 9ba957824..9e9088f1e 100644
--- a/src/libslic3r/Geometry/ConvexHull.hpp
+++ b/src/libslic3r/Geometry/ConvexHull.hpp
@@ -4,6 +4,10 @@
 #include "../Polygon.hpp"
 
 namespace Slic3r {
+
+class ExPolygon;
+using ExPolygons = std::vector<ExPolygon>;
+
 namespace Geometry {
 
 Pointf3s convex_hull(Pointf3s points);