From 872e2806f74e922a25e0f9586faa6624883728ca Mon Sep 17 00:00:00 2001
From: Kevin Ushey <kevinushey@gmail.com>
Date: Wed, 21 Jul 2021 19:56:34 -0700
Subject: [PATCH] support compilation with r-devel

---
 src/cpp/r/session/RSession.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/cpp/r/session/RSession.cpp b/src/cpp/r/session/RSession.cpp
index 0066a61c1b6..6c5f986f6a0 100644
--- a/src/cpp/r/session/RSession.cpp
+++ b/src/cpp/r/session/RSession.cpp
@@ -68,6 +68,9 @@
 
 #include <gsl/gsl>
 
+extern "C" {
+int Rf_countContexts(int, int);
+}
 #define CTXT_BROWSER 16
 
 // get rid of windows TRUE and FALSE definitions
@@ -493,7 +496,7 @@ bool isSuspendable(const std::string& currentPrompt)
     
    return true;
 }
-   
+
 
 bool browserContextActive()
 {