From e4a8d6e2a4355f54cb73d3b27afb0ce19ce7eb0d Mon Sep 17 00:00:00 2001
From: David Bremner <david@tethera.net>
Date: Sun, 21 Apr 2019 20:36:43 -0300
Subject: [PATCH] build: only try to build .rsti files if we have emacs and
 sphinx

Emacs is needed to build them, and sphinx is needed to use them
---
 emacs/Makefile.local | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/emacs/Makefile.local b/emacs/Makefile.local
index 04913a06..40b7c14f 100644
--- a/emacs/Makefile.local
+++ b/emacs/Makefile.local
@@ -47,8 +47,13 @@ emacs_images := \
 emacs_bytecode = $(emacs_sources:.el=.elc)
 emacs_docstrings = $(emacs_sources:.el=.rsti)
 
+ifneq ($(HAVE_SPHINX)$(HAVE_EMACS),11)
+docstring.stamp:
+	@echo "Missing prerequisites, not collecting docstrings"
+else
 docstring.stamp: ${emacs_docstrings}
 	touch $@
+endif
 
 # Because of defmacro's and defsubst's, we have to account for load
 # dependencies between Elisp files when byte compiling.  Otherwise,