Makefile: add elint to compilation methods, ensure *.elc files exist after compilation

* lisp/Makefile: Add targets `slint3´ (one Emacs process for all
  sources) and `slint4´ (one Emacs instance for each source) using
  ELINTL and ELINTF to lint lisp files.  Split out compile actions
  into internal targets and implement `compile-*´ targets in terms of
  these internal targets.  Follow all targets that do not
  procude *.elc files with `dirall´ so that the *.elc files exist at
  the end of compilation.

* default.mk: Add configuration variables ELINTL and ELINTF.

* targets.mk: Add ELINTL and ELINTF to CONF_CALL.

default.mk

@@ -73,6 +73,10 @@ MAKE_LOCAL_MK = $(BATCH) \
 # Emacs must be started in lisp directory
 BATCHL	= $(BATCH) \
 	  --eval '(add-to-list '"'"'load-path ".")'
+ELINTL	= $(BATCHL) \
+	  --eval '(load "elint")'
+ELINTF	= --eval '(elint-initialize t)' \
+	  --eval '(elint-file "./$$(el)")'
 
 # How to generate org-install.el
 MAKE_ORG_INSTALL = $(BATCHL) \
@@ -132,9 +136,12 @@ SUDO	= sudo
 # INSTALL_INFO = ginstall-info # Debian: avoid harmless warning message
 INSTALL_INFO = install-info
 
-# target variant for 'compile'
-# _COMPILE_ = single # one Emacs process per compilation
-# _COMPILE_ = source # ditto, but remove compiled file immediately
-# _COMPILE_ = slint1 # possibly elicit more warnings
-# _COMPILE_ = slint2 # possibly elicit even more warnings
+# target method for 'compile'
 _COMPILE_ = dirall
+#  (w/ slowdown compared to default variant)
+# _COMPILE_ = single #   4x one Emacs process per compilation
+# _COMPILE_ = source #   5x ditto, but remove compiled file immediately
+# _COMPILE_ = slint1 #   3x possibly elicit more warnings
+# _COMPILE_ = slint2 #   7x possibly elicit even more warnings
+# _COMPILE_ = slint3 #  25x run elint in a single Emacs process
+# _COMPILE_ = slint4 # 275x run elint in one Emacs process per source file

lisp/Makefile

@@ -11,7 +11,9 @@ LISPF = $(filter-out $(LISPA),$(sort $(wildcard *.el)))
 LISPC = $(filter-out $(LISPN:%el=%elc),$(LISPF:%el=%elc))
 
 .PHONY:	all compile compile-dirty \
-	compile-single compile-source compile-slint1 compile-slint2 \
+	dirall source slint1 slint3 slint4 \
+	compile-single compile-source \
+	compile-slint1 compile-slint2 compile-slint3 compile-slint4 \
 	autoloads \
 	install clean cleanauto cleanall cleanelc clean-install
 
@@ -19,15 +21,30 @@ LISPC = $(filter-out $(LISPN:%el=%elc),$(LISPF:%el=%elc))
 all compile compile-dirty::	 autoloads
 	$(MAKE) compile-$(_COMPILE_)
 
-compile-dirall:
-	@$(ELCDIR)
+compile-dirall:	dirall
 compile-single: $(LISPC)
-compile-source: cleanelc
+compile-source:	source dirall
+compile-slint1:	dirall slint1
+compile-slint2:	source dirall slint1
+compile-slint3:	slint3 dirall
+compile-slint4:	slint4 dirall
+
+# internal
+dirall:
+	@$(info ==================== $@ ====================)
+	@$(ELCDIR)
+source: cleanelc
+	@$(info ==================== $@ ====================)
 	@$(foreach elc,$(LISPC),$(MAKE) $(elc) && $(RM) $(elc);)
-compile-slint1:	compile-dirall
+slint1:
+	@$(info ==================== $@ ====================)
 	@$(foreach elc,$(LISPC),$(RM) $(elc); $(MAKE) $(elc);)
-compile-slint2:
-	$(MAKE) compile-source compile-slint1
+slint3:
+	@$(info ==================== $@ ====================)
+	-@$(ELINTL) $(foreach el,$(LISPF),$(ELINTF))
+slint4:
+	@$(info ==================== $@ ====================)
+	-@$(foreach el,$(LISPF),$(ELINTL) $(ELINTF);)
 
 %.elc:	%.el
 	@$(info Compiling single $(abspath $<)...)

targets.mk

@@ -35,7 +35,7 @@ CONF_BASE = EMACS DESTDIR
 CONF_DEST = lispdir infodir datadir testdir
 CONF_TEST = BTEST_PRE BTEST_POST BTEST_OB_LANGUAGES BTEST_EXTRA
 CONF_EXEC = CP MKDIR RM RMR FIND SUDO PDFTEX TEXI2PDF TEXI2HTML MAKEINFO INSTALL_INFO
-CONF_CALL = BATCH BATCHL ELCDIR BTEST MAKE_LOCAL_MK MAKE_ORG_INSTALL MAKE_ORG_VERSION
+CONF_CALL = BATCH BATCHL ELCDIR ELINTL ELINTF BTEST MAKE_LOCAL_MK MAKE_ORG_INSTALL MAKE_ORG_VERSION
 config-eol:: EOL = \#
 config-eol:: config-all
 config config-all::