only build elc files if emacs is installed

diff --git a/emacs_el/Makefile b/emacs_el/Makefile
index a044ede50978229c9bb53864c6f495bc14475703..8f48010536b2418c5cb1ec9a8b7f515aab1f9698 100644 (file)
--- 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