diff -rNu ProofGeneral-4.2.orig/Makefile ProofGeneral-4.2/Makefile
--- ProofGeneral-4.2.orig/Makefile	2012-03-05 19:52:34.000000000 +0100
+++ ProofGeneral-4.2/Makefile	2013-06-03 14:38:06.092147484 +0200
@@ -62,7 +62,7 @@
 # only during compilation.  Another idea: put a function in proof-site
 # to output the compile-time load path and ELISP_DIRS so these are set
 # just in that one place.
-BYTECOMP = $(BATCHEMACS) -eval '(setq load-path (append (mapcar (lambda (d) (concat "${PWD}/" (symbol-name d))) (quote (${ELISP_DIRS}))) load-path))' -eval '(progn (require (quote bytecomp)) (require (quote mouse)) (require (quote tool-bar)) (require (quote fontset)) (setq byte-compile-warnings (remove (quote cl-functions) (remove (quote noruntime) byte-compile-warning-types))) (setq byte-compile-error-on-warn t))' -f batch-byte-compile
+BYTECOMP = $(BATCHEMACS) -eval '(setq load-path (append (mapcar (lambda (d) (concat "${PWD}/" (symbol-name d))) (quote (${ELISP_DIRS}))) load-path))' -eval '(progn (require (quote bytecomp)) (require (quote mouse)) (require (quote tool-bar)) (require (quote fontset)) (setq byte-compile-warnings (remove (quote cl-functions) (remove (quote noruntime) byte-compile-warning-types))))' -f batch-byte-compile
 EL=$(shell for f in $(ELISP_DIRS); do ls $$f/*.el; done)
 ELC=$(EL:.el=.elc)