diff '--color=auto' -ur openscad-2021.01.orig/c++std.pri openscad-2021.01/c++std.pri
--- openscad-2021.01.orig/c++std.pri	2021-01-31 21:17:41.000000000 +0100
+++ openscad-2021.01/c++std.pri	2024-11-05 11:27:55.002178949 +0100
@@ -26,8 +26,8 @@
 }
 
 c++std {
-  CONFIG += c++14 strict_c++
-  message("Using C++14")
+  CONFIG += c++17 strict_c++
+  message("Using C++17")
 
   *clang*: {
       # 3rd party libraries will probably violate this for a long time