From 54a61f7553d21bb0cdf5195fc17d0454afc9217b Mon Sep 17 00:00:00 2001
From: Mathis Logemann <mathisloge@gmail.com>
Date: Wed, 3 Feb 2021 22:47:15 +0100
Subject: [PATCH] add dlcfn on non windows systems

---
 CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index bbcd456fc..c5243dc16 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -214,6 +214,12 @@ if(USE_SVG_RENDERER)
     list(APPEND MAPNIK_COMPILE_DEFS SVG_RENDERER)
 endif()
 
+if(NOT WIN32) 
+    message(STATUS "Compiling with -DMAPNIK_COMPILE_DEFS")
+    list(APPEND MAPNIK_COMPILE_DEFS MAPNIK_HAS_DLCFN)
+    list(APPEND MAPNIK_OPTIONAL_LIBS ${CMAKE_DL_LIBS})
+endif()
+
 add_library(headers INTERFACE)
 add_library(mapnik::headers ALIAS headers)