Makefile: enable one-process-per-source compilations again

* default.mk: Re-introduce ELC for single file compilation.

* targets.mk: New targets compile-single and compile-single-source
  that get handed off to lisp/Makefile.

* lisp/Makefile: Implement pattern rule using $(ELC).  Implement
  target compile-single that uses a separate Emacs process for each
  target by invoking the pattern rule.  Implement target
  compile-single-source that additionally removes the compiled file
  directly after it has been produced, so compilation will always use
  source files only, never byte-compiled files.

* Makefile: Document new targets.

These new targets are meant to check for problems with
interdependencies in Org.

Makefile

@@ -18,84 +18,86 @@ help helpall::
 	$(info Getting Help)
 	$(info ============)
 	$(info )
-	$(info make help          - show brief help)
-	$(info make targets       - ditto)
-	$(info make helpall       - show extended help)
+	$(info make help           - show brief help)
+	$(info make targets        - ditto)
+	$(info make helpall        - show extended help)
 	$(info )
 	$(info Build and Check)
 	$(info ===============)
-	$(info make               - build Org ELisp and all documentation)
-	$(info make all           - ditto)
-	$(info make compile       - build Org ELisp files)
-	$(info make autoloads     - create org-install.el to load org in-place)
-	$(info make check         - build Org ELisp files and run test suite)
+	$(info make                - build Org ELisp and all documentation)
+	$(info make all            - ditto)
+	$(info make compile        - build Org ELisp files)
+	$(info make autoloads      - create org-install.el to load org in-place)
+	$(info make check          - build Org ELisp files and run test suite)
 helpall::
-	$(info make test          - ditto)
-	$(info make compile-dirty - build only stale Org ELisp files)
-	$(info make test-dirty    - check without building first)
+	$(info make test           - ditto)
+	$(info make compile-dirty  - build only stale Org ELisp files)
+	$(info make compile-single - build using one Emacs process per file)
+	$(info make compile-source - ditto, but immediately remove byte-compiled file )
+	$(info make test-dirty     - check without building first)
 	$(info )
 	$(info Compatibility)
 	$(info =============)
-	$(info make oldorg        - what the old make did: compile autoloads info)
+	$(info make oldorg         - what the old make did: compile autoloads info)
 	$(info )
 	$(info Convenience)
 	$(info ===========)
-	$(info make up0           - pull from upstream)
-	$(info make up1           - pull from upstream, build and check)
-	$(info make up2           - pull from upstream, build, check and install)
-	$(info make update        - pull from upstream and build)
-	$(info make update2       - pull from upstream, build and install)
-	$(info make uncompiled    - combine cleanlisp and autoloads)
-	$(info make local.mk      - create new local.mk as template for adaptation)
+	$(info make up0            - pull from upstream)
+	$(info make up1            - pull from upstream, build and check)
+	$(info make up2            - pull from upstream, build, check and install)
+	$(info make update         - pull from upstream and build)
+	$(info make update2        - pull from upstream, build and install)
+	$(info make uncompiled     - combine cleanlisp and autoloads)
+	$(info make local.mk       - create new local.mk as template for adaptation)
 	$(info )
 	$(info Cleaning)
 	$(info ========)
-	$(info make clean         - remove built Org ELisp files and documentation)
-	$(info make cleanall      - remove everything that can be built and all remnants)
-	$(info make cleandirs     - clean in etc/, lisp/ and doc/)
-	$(info make cleancontrib  - remove remnants in contrib/)
-	$(info make cleantesting  - remove remnants in testing/)
-	$(info make cleanutils    - remove remnants in UTILITIES/)
-	$(info make cleandoc      - remove built documentation)
-	$(info make cleandocs     - ditto)
-	$(info make cleanlisp     - remove built Org ELisp files)
-	$(info make cleanelc      - ditto)
-	$(info make cleantest     - remove test directory)
-	$(info make clean-install - remove previous Org installation)
+	$(info make clean          - remove built Org ELisp files and documentation)
+	$(info make cleanall       - remove everything that can be built and all remnants)
+	$(info make cleandirs      - clean in etc/, lisp/ and doc/)
+	$(info make cleancontrib   - remove remnants in contrib/)
+	$(info make cleantesting   - remove remnants in testing/)
+	$(info make cleanutils     - remove remnants in UTILITIES/)
+	$(info make cleandoc       - remove built documentation)
+	$(info make cleandocs      - ditto)
+	$(info make cleanlisp      - remove built Org ELisp files)
+	$(info make cleanelc       - ditto)
+	$(info make cleantest      - remove test directory)
+	$(info make clean-install  - remove previous Org installation)
 	$(info )
 	$(info Configuration Check)
 	$(info ===================)
 help helpall::
-	$(info make config        - check main configuration)
+	$(info make config         - check main configuration)
 helpall::
-	$(info make config-test   - check test configuration)
-	$(info make config-exe    - check executables configuration)
-	$(info make config-cmd    - check command configuration)
-	$(info make config-all    - check all configuration)
-	$(info make config-eol    - check all configuration, mark end-of-line)
+	$(info make config-test     - check test configuration)
+	$(info make config-exe      - check executables configuration)
+	$(info make config-cmd      - check command configuration)
+	$(info make config-all      - check all configuration)
+	$(info make config-eol      - check all configuration, mark end-of-line)
 	$(info )
 	$(info Documentation)
 	$(info =============)
 help helpall::
-	$(info make doc           - build all documentation)
+	$(info make doc            - build all documentation)
 helpall::
-	$(info make docs          - ditto)
+	$(info make docs           - ditto)
 help helpall::
-	$(info make info          - build Info documentation)
+	$(info make info           - build Info documentation)
 helpall::
-	$(info make html          - build HTML documentation)
-	$(info make pdf           - build PDF documentation)
-	$(info make card          - build reference cards)
-	$(info make refcard       - ditto)
+	$(info make html           - build HTML documentation)
+	$(info make pdf            - build PDF documentation)
+	$(info make card           - build reference cards)
+	$(info make refcard        - ditto)
 help helpall::
 	$(info )
 	$(info Installation)
 	$(info ============)
-	$(info make install       - build and install Org)
+	$(info make install        - build and install Org)
 helpall::
-	$(info make install-etc   - build and install files in /etc)
-	$(info make install-lisp  - build and install Org Elisp files)
-	$(info make install-info  - build and install Info documentation)
+	$(info make install-etc    - build and install files in /etc)
+	$(info make install-lisp   - build and install Org Elisp files)
+	$(info make install-info   - build and install Info documentation)
 help helpall::
 	@echo ""
 

default.mk

@@ -90,6 +90,10 @@ MAKE_ORG_VERSION = $(BATCHL) \
 ELCDIR	= $(BATCHL) \
 	  --eval '(batch-byte-recompile-directory 0)'
 
+# How to byte-compile a single file
+ELC	= $(BATCHL) \
+	  --eval '(batch-byte-compile)'
+
 # How to make a pdf file from a texinfo file
 TEXI2PDF = texi2pdf --batch --clean
 

lisp/Makefile

@@ -10,7 +10,7 @@ LISPA = $(LISPV) $(LISPI)
 LISPF = $(filter-out $(LISPA),$(wildcard *.el))
 LISPC = $(filter-out $(LISPN:%el=%elc),$(LISPF:%el=%elc))
 
-.PHONY:	all compile compile-dirty \
+.PHONY:	all compile compile-dirty compile-single \
 		autoloads \
 		install clean cleanauto cleanall clean-install
 
@@ -18,6 +18,12 @@ LISPC = $(filter-out $(LISPN:%el=%elc),$(LISPF:%el=%elc))
 all compile::	autoloads
 all compile compile-dirty::	 $(LISPI) $(LISPV)
 	$(ELCDIR)
+compile-single: clean autoloads $(LISPC)
+compile-source: clean autoloads
+	@$(foreach elc,$(LISPC),$(MAKE) $(elc) && $(RM) $(elc);)
+
+%.elc:	%.el
+	-$(ELC) $(<)
 
 autoloads:	cleanauto $(LISPI) $(LISPV)
 

targets.mk

@@ -28,7 +28,7 @@ endif
 	cleancontrib cleantesting cleanutils
 	cleanrel clean-install cleanelc cleandirs \
 	cleanlisp cleandoc cleandocs cleantest \
-	compile compile-dirty uncompiled \
+	compile compile-single compile-source compile-dirty uncompiled \
 	config config-test config-exe config-all config-eol
 
 CONF_BASE = EMACS DESTDIR
@@ -75,7 +75,7 @@ local.mk:
 
 all compile::
 	$(foreach dir, doc lisp, $(MAKE) -C $(dir) clean;)
-compile compile-dirty::
+compile compile-dirty compile-single compile-source::
 	$(MAKE) -C lisp $@
 all clean-install::
 	$(foreach dir, $(SUBDIRS), $(MAKE) -C $(dir) $@;)