gnu: emacs-ess: Fix build failure.

* gnu/packages/patches/emacs-ess-fix-obsolete-function-alias.patch: New file.
* gnu/packages/statistics.scm (emacs-ess)[source]<patches>: Add it here...
* gnu/local.mk (dist_patch_DATA): ... and here.

1 files changed, 23 insertions, 0 deletions

diff --git a/gnu/packages/patches/emacs-ess-fix-obsolete-function-alias.patch b/gnu/packages/patches/emacs-ess-fix-obsolete-function-alias.patch
new file mode 100644
index 0000000000..f7b61391c3
--- /dev/null
+++ b/gnu/packages/patches/emacs-ess-fix-obsolete-function-alias.patch
@@ -0,0 +1,23 @@
+From 9cc5520e1998d03f5dec0fbb1fe71b7cdec38b65 Mon Sep 17 00:00:00 2001
+From: Alex Branham <alex.branham@gmail.com>
+Date: Wed, 6 Jan 2021 06:41:20 -0500
+Subject: [PATCH] Add required when to obsolete function alias
+
+Closes #1085
+---
+ lisp/ess-r-package.el | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lisp/ess-r-package.el b/lisp/ess-r-package.el
+index 260959955..397ce14e6 100644
+--- a/lisp/ess-r-package.el
++++ b/lisp/ess-r-package.el
+@@ -577,7 +577,7 @@ package mode. Use this function if state of the buffer such as
+   (error "As of ESS 16.04, `ess-developer' is deprecated. Use `ess-r-set-evaluation-env' instead"))
+ 
+ (defalias 'ess-toggle-developer 'ess-developer)
+-(define-obsolete-function-alias 'ess-r-devtools-check-package-buildwin 'ess-r-devtools-check-with-winbuilder)
++(define-obsolete-function-alias 'ess-r-devtools-check-package-buildwin 'ess-r-devtools-check-with-winbuilder "18.04")
+ (define-obsolete-function-alias 'ess-r-devtools-ask 'ess-r-devtools-execute-command "18.04")
+ 
+ (make-obsolete-variable 'ess-developer "Please use `ess-developer-select-package' and `ess-r-set-evaluation-env' instead." "16.04")