rstudio: fix build

srcpkgs/rstudio/patches/fix-build.patch

@@ -0,0 +1,34 @@
+Ref: https://www.mail-archive.com/commit@lists.opensuse.org/msg43991.html
+
+From 872e2806f74e922a25e0f9586faa6624883728ca Mon Sep 17 00:00:00 2001
+From: Kevin Ushey <kevinus...@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()
+ {