From c063b860c56ad105484d00fcd3f3b417140db598 Mon Sep 17 00:00:00 2001
From: Martin Dobias <wonder.sk@gmail.com>
Date: Sat, 10 Feb 2024 00:43:23 +0100
Subject: [PATCH] Fix build with PDAL < 2.5

Submitted to upstream in https://github.com/hobuinc/untwine/pull/157
---
 external/untwine/untwine/Untwine.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/external/untwine/untwine/Untwine.cpp b/external/untwine/untwine/Untwine.cpp
index c67008639091..75c39710be90 100644
--- a/external/untwine/untwine/Untwine.cpp
+++ b/external/untwine/untwine/Untwine.cpp
@@ -14,6 +14,8 @@
 #include <pdal/util/FileUtils.hpp>
 #include <pdal/util/ProgramArgs.hpp>
 
+#include <regex>
+
 #include "Common.hpp"
 #include "Config.hpp"
 #include "ProgressWriter.hpp"