* doc/lispintro/Makefile.in (emacsdir): New variable..
(MAKEINFO_OPTS, ENVADD): Add $emacsdir.
(srcs): Add emacsver.texi.
(dist): Include emacsver.texi. Edit emacsdir.
* doc/lispintro/emacs-lisp-intro.texi (emacsver.texi): Include it.
(copying): For non-printed versions, uses Emacs version rather
than that of the printed book.
(Complications, Lisp macro, defvar and asterisk, defcustom): Copyedits.
* doc/lispintro/makefile.w32-in (emacsdir): New variable.
(INFO_SOURCES): Add emacsver.texi.
(ENVADD): Add $emacsdir (and $texinfodir).
Ref http://lists.gnu.org/archive/html/emacs-devel/2012-04/msg00354.html
* configure.in (INFO_EXT, INFO_OPTS): New output variables.
* doc/emacs/Makefile.in (INFO_EXT, INFO_OPTS): New, set by configure.
(info, infoclean): Use $INFO_EXT.
($(infodir)/emacs$(INFO_EXT)): Use $INFO_EXT and $INFO_OPT.
* doc/emacs/makefile.w32-in (INFO_EXT, INFO_OPTS): New.
(INFO_TARGETS): Use $INFO_EXT.
($(infodir)/emacs$(INFO_EXT)): Use $INFO_EXT and $INFO_OPT, and -o.
* doc/lispintro/Makefile.in (INFO_EXT, INFO_OPTS): New, set by configure.
(info, infoclean): Use $INFO_EXT.
(${infodir}/eintr$(INFO_EXT)): Use $INFO_EXT and $INFO_OPT.
* doc/lispintro/makefile.w32-in (INFO_EXT, INFO_OPTS): New.
(INFO_TARGETS, clean): Use $INFO_EXT.
($(infodir)/eintr$(INFO_EXT)): Use $INFO_EXT and $INFO_OPT.
* doc/lispref/Makefile.in (INFO_EXT, INFO_OPTS): New, set by configure.
(info, infoclean): Use $INFO_EXT.
($(infodir)/elisp$(INFO_EXT)): Use $INFO_EXT and $INFO_OPT.
* doc/lispref/makefile.w32-in (INFO_EXT, INFO_OPTS): New.
(info, maintainer-clean): Use $INFO_EXT.
($(infodir)/elisp$(INFO_EXT)): Use $INFO_EXT and $INFO_OPT.
* doc/misc/Makefile.in (INFO_EXT, INFO_OPTS): New, set by configure.
(INFO_TARGETS): Use $INFO_EXT.
Make all rules generating info files use $INFO_EXT, $INFO_OPT, and -o.
* doc/misc/makefile.w32-in (INFO_EXT, INFO_OPTS): New.
(INFO_TARGETS): Use $INFO_EXT.
Make all rules generating info files use $INFO_EXT, $INFO_OPT, and -o.
