From e5803f94497f784354218c4c463ad05aa8271fb5 Mon Sep 17 00:00:00 2001
From: Scott R Charlton <charlton@usgs.gov>
Date: Mon, 4 Mar 2024 18:42:52 -0700
Subject: [PATCH] =?UTF-8?q?fixed=20=E2=80=98nullptr=E2=80=99=20was=20not?=
 =?UTF-8?q?=20declared=20in=20this=20scope=20on=20ubuntu-16.04?=
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---
 src/phreeqcpp/common/Utils.cxx | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/phreeqcpp/common/Utils.cxx b/src/phreeqcpp/common/Utils.cxx
index 0e8d461a..44f77b17 100644
--- a/src/phreeqcpp/common/Utils.cxx
+++ b/src/phreeqcpp/common/Utils.cxx
@@ -16,6 +16,10 @@
 #  define nullptr NULL
 #endif
 
+#if __cplusplus < 201103L // Check if C++ standard is pre-C++11
+#  define nullptr NULL
+#endif
+
 #if defined(PHREEQCI_GUI)
 #ifdef _DEBUG
 #define new DEBUG_NEW