From f56db7ea76e3634257cd1df235aea5a6a7eef2fc Mon Sep 17 00:00:00 2001
From: Paolo Tosco <paolo.tosco.mail@gmail.com>
Date: Thu, 10 Aug 2023 14:18:33 +0200
Subject: [PATCH] allow building the cartridge against PostgreSQL 16 (#6580)

---
 Code/PgSQL/rdkit/rdkit.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Code/PgSQL/rdkit/rdkit.h b/Code/PgSQL/rdkit/rdkit.h
index a278884fa..2ff5ad42f 100644
--- a/Code/PgSQL/rdkit/rdkit.h
+++ b/Code/PgSQL/rdkit/rdkit.h
@@ -39,6 +39,14 @@ extern "C" {
 #endif
 
 #include <postgres.h>
+#ifdef PG_VERSION_NUM
+#if PG_VERSION_NUM >= 160000
+#include <varatt.h>
+#ifndef Abs
+#define Abs(x)  ((x) >= 0 ? (x) : -(x))
+#endif
+#endif
+#endif
 
 typedef bytea Mol;