From 2cfc45f6ae2f447d15a222c50c3400fe59671207 Mon Sep 17 00:00:00 2001
From: James Cherry <cherry@parallaxsw.com>
Date: Thu, 15 Jun 2023 11:04:22 -0700
Subject: [PATCH] LumpedCapDelayCalc.cc use std::isnan

Signed-off-by: James Cherry <cherry@parallaxsw.com>
---
 dcalc/LumpedCapDelayCalc.cc | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/dcalc/LumpedCapDelayCalc.cc b/dcalc/LumpedCapDelayCalc.cc
index bb748a82..91c38bab 100644
--- a/dcalc/LumpedCapDelayCalc.cc
+++ b/dcalc/LumpedCapDelayCalc.cc
@@ -16,6 +16,8 @@
 
 #include "LumpedCapDelayCalc.hh"
 
+#include <cmath>  // isnan
+
 #include "Debug.hh"
 #include "Units.hh"
 #include "TimingArc.hh"
@@ -29,6 +31,8 @@
 
 namespace sta {
 
+using std::isnan;
+
 ArcDelayCalc *
 makeLumpedCapDelayCalc(StaState *sta)
 {