$OpenBSD: patch-src_cpp_r_session_RStdCallbacks_cpp,v 1.1 2021/05/22 12:01:39 rsadowski Exp $

fix building with boost 1.75.

Index: src/cpp/r/session/RStdCallbacks.cpp
--- src/cpp/r/session/RStdCallbacks.cpp.orig
+++ src/cpp/r/session/RStdCallbacks.cpp
@@ -19,6 +19,7 @@
 
 #include <boost/function.hpp>
 #include <boost/regex.hpp>
+#include <boost/bind/bind.hpp>
 
 #include <r/RExec.hpp>
 #include <r/ROptions.hpp>
@@ -57,6 +58,7 @@ __declspec(dllimport) SA_TYPE SaveAction;
 }
 
 using namespace rstudio::core;
+using namespace boost::placeholders;
 
 namespace rstudio {
 namespace r {
