From: Don Armstrong <don@donarmstrong.com>
Date: Tue, 21 Jan 2014 01:02:18 +0000 (-0800)
Subject: only build elc files if emacs is installed
X-Git-Url: https://git.donarmstrong.com/?p=lib.git;a=commitdiff_plain;h=8f9b84c09fd62fc003e3ae891c9537572cb87763

only build elc files if emacs is installed
---

diff --git a/emacs_el/Makefile b/emacs_el/Makefile
index a044ede..8f48010 100644
--- a/emacs_el/Makefile
+++ b/emacs_el/Makefile
@@ -1,9 +1,19 @@
 #!/usr/bin/make
 
-all: $(patsubst %.el,%.elc,$(wildcard *.el))
+
+WHICH_EMACS=
+
+ELC_FILES=
+ifneq ($(shell (which emacs >/dev/null 2>&1 || echo -n "fail") && echo -n "success"),"fail")
+ELC_FILES=$(patsubst %.el,%.elc,$(wildcard *.el))
+endif
+
+all: $(ELC_FILES)
+
+EMACS=emacs
 
 %.elc: %.el
-	emacs -q -no-site-file -L . --no-site-file -batch -f batch-byte-compile $<;
+	$(EMACS) -q -no-site-file -L . --no-site-file -batch -f batch-byte-compile $<;
 
 clean: 
 	rm -f *.elc