https://bugs.gentoo.org/445242
http://proofgeneral.inf.ed.ac.uk/trac/ticket/458

--- ProofGeneral-4.2-orig/Makefile
+++ ProofGeneral-4.2/Makefile
@@ -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 (${ELISP_DIRS}))) load-path))' -eval '(progn (require (quote bytecomp)) (require (quote mouse)) (require (quote tool-bar)) (require (quote fontset)))' -f batch-byte-compile
 EL=$(shell for f in $(ELISP_DIRS); do ls $$f/*.el; done)
 ELC=$(EL:.el=.elc)