Parallelize documentation builds.

This speeds up building of documentation on multiprocessor
platforms, and is motivated by Texinfo 5.0, which is much slower.
Add a toplevel rule 'make docs' to make all the documentation.
* .bzrignore: Add .dvi, .html, .ps.
* Makefile.in (DVIS, HTMLS, INFOS, PSS, DOCS): New macros.
($(DOCS), docs, vi, html, pdf, ps): New rules.
(info-real): Depend on $(INFOS) rather than doing it sequentially.
(dvi): Depend on $(DVIS) rather than doing it sequentially.
* doc/misc/Makefile.in (html): New rule.

4 files changed, 38 insertions, 11 deletions

diff --git a/ChangeLog b/ChangeLog
index e59e0646cb7..2720997a6c8 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,15 @@
+2013-02-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	Parallelize documentation builds.
+	This speeds up building of documentation on multiprocessor
+	platforms, and is motivated by Texinfo 5.0, which is much slower.
+	Add a toplevel rule 'make docs' to make all the documentation.
+	* .bzrignore: Add .dvi, .html, .ps.
+	* Makefile.in (DVIS, HTMLS, INFOS, PSS, DOCS): New macros.
+	($(DOCS), docs, vi, html, pdf, ps): New rules.
+	(info-real): Depend on $(INFOS) rather than doing it sequentially.
+	(dvi): Depend on $(DVIS) rather than doing it sequentially.
+
 2013-02-18  Aidan Gauland  <aidalgol@no8wireless.co.nz>
 
 	* doc/misc/eshell.texi: Added documentation for Eshell insert
diff --git a/Makefile.in b/Makefile.in
index a2de4f3b164..42b900401f7 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -54,6 +54,9 @@
 # make bootstrap
 #      Removes all the compiled files to force a new bootstrap from a
 #      clean slate, and then build in the normal way.
+#
+# make docs
+#      Make Emacs documentation files from their sources; requires makeinfo.
 
 SHELL = /bin/sh
 
@@ -859,13 +862,25 @@ check:
 dist:
 	cd ${srcdir}; ./make-dist
 
+DVIS  = lispref-dvi  lispintro-dvi  emacs-dvi  misc-dvi
+HTMLS = lispref-html lispintro-html emacs-html misc-html
+INFOS = lispref-info lispintro-info emacs-info misc-info
+PDFS  = lispref-pdf  lispintro-pdf  emacs-pdf  misc-pdf
+PSS   = lispref-ps   lispintro-ps   emacs-ps # no misc-ps
+
+DOCS = $(DVIS) $(HTMLS) $(INFOS) $(PDFS) $(PSS)
+$(DOCS):
+	t=$@; IFS=-; set $$t; IFS=; cd doc/$$1 && $(MAKE) $(MFLAGS) $$2
+
+.PHONY: $(DOCS) docs pdf ps
 .PHONY: info dvi dist check html info-real force-info check-info-dir
 
-info-real:
-	(cd doc/emacs; $(MAKE) $(MFLAGS) info)
-	(cd doc/misc; $(MAKE) $(MFLAGS) info)
-	(cd doc/lispref; $(MAKE) $(MFLAGS) info)
-	(cd doc/lispintro; $(MAKE) $(MFLAGS) info)
+docs: $(DOCS)
+dvi: $(DVIS)
+html: $(HTMLS)
+info-real: $(INFOS)
+pdf: $(PDFS)
+ps: $(PSS)
 
 force-info:
 # Note that man/Makefile knows how to put the info files in $(srcdir),
@@ -904,12 +919,6 @@ check-info-dir: info
 	fi ; \
 	echo "info/dir is OK"
 
-dvi:
-	(cd doc/emacs; $(MAKE) $(MFLAGS) dvi)
-	(cd doc/misc; $(MAKE) $(MFLAGS) dvi)
-	(cd doc/lispref; $(MAKE) $(MFLAGS) elisp.dvi)
-	(cd doc/lispintro; $(MAKE) $(MFLAGS) emacs-lisp-intro.dvi)
-
 #### Bootstrapping.
 
 ### This first cleans the lisp subdirectory, removing all compiled
diff --git a/doc/misc/ChangeLog b/doc/misc/ChangeLog
index 41eb17415b7..4f827073b2f 100644
--- a/doc/misc/ChangeLog
+++ b/doc/misc/ChangeLog
@@ -1,3 +1,7 @@
+2013-02-21  Paul Eggert  <eggert@cs.ucla.edu>
+
+	* Makefile.in (html): New rule.
+
 2013-02-20  Michael Albinus  <michael.albinus@gmx.de>
 
 	* tramp.texi (Android shell setup): Improve.  Reported by Thierry
diff --git a/doc/misc/Makefile.in b/doc/misc/Makefile.in
index 3dac35aafee..add1b42a545 100644
--- a/doc/misc/Makefile.in
+++ b/doc/misc/Makefile.in
@@ -192,6 +192,8 @@ webhack: clean
 
 dvi: $(DVI_TARGETS)
 
+html: $(HTML_TARGETS)
+
 pdf: $(PDF_TARGETS)
 
 # Note that all the Info targets build the Info files in srcdir.