Support regeneration of ja-dic.el under '--with-small-ja-dic'

* lisp/international/ja-dic-cnv.el (skkdic-convert): Record the
value of SMALL_JA_DIC option used to produce ja-dic.el.
* leim/Makefile.in (small-ja-dic-option): New target, triggers
regeneration of ja-dic.el when the value of SMALL_JA_DIC option
changes by the configure script.  Suggested by Ulrich Mueller
<ulm@gentoo.org>.
(${leimdir}/ja-dic/ja-dic.el): Depend on 'small-ja-dic-option'.
(Bug#66125)

* make-dist (possibly_non_vc_files):
* .gitignore: Add 'leim/small-ja-dic-option'.

.gitignore

@@ -95,6 +95,7 @@ lisp/cedet/semantic/grammar-wy.el
 lisp/eshell/esh-groups.el
 lisp/finder-inf.el
 lisp/leim/ja-dic/
+leim/small-ja-dic-option
 lisp/leim/leim-list.el
 lisp/leim/quail/4Corner.el
 lisp/leim/quail/ARRAY30.el

leim/Makefile.in

@@ -26,6 +26,7 @@ SHELL = @SHELL@
 # Here are the things that we expect ../configure to edit.
 srcdir=@srcdir@
 top_builddir = @top_builddir@
+top_srcdir = @top_srcdir@
 
 # Where the generated files go.
 leimdir = ${srcdir}/../lisp/leim
@@ -134,9 +135,15 @@ ${leimdir}/leim-list.el: ${srcdir}/leim-ext.el ${TIT_MISC}
 
 ${leimdir}/ja-dic/ja-dic.el: | $(leimdir)/ja-dic
 
+# This is used to support regeneration of ja-dic when the SMALL_JA_DIC
+# option is flipped by the configure-time option.
+small-ja-dic-option: ../config.status
+	$(AM_V_GEN)echo "Small ja-dic option: $(SMALL_JA_DIC)" > $@.$$$$ && \
+	  ${top_srcdir}/build-aux/move-if-change $@.$$$$ $@
+
 .PHONY: generate-ja-dic
 generate-ja-dic: ${leimdir}/ja-dic/ja-dic.el
-${leimdir}/ja-dic/ja-dic.el: $(srcdir)/SKK-DIC/SKK-JISYO.L
+${leimdir}/ja-dic/ja-dic.el: $(srcdir)/SKK-DIC/SKK-JISYO.L small-ja-dic-option
 	$(AM_V_GEN)$(RUN_EMACS) -batch -l ja-dic-cnv \
 	  -f batch-skkdic-convert -dir "$(leimdir)/ja-dic" $(JA_DIC_NO_REDUCTION_OPTION) "$<"
 

lisp/international/ja-dic-cnv.el

@@ -346,6 +346,8 @@ If NO-REDUCTION is non-nil, do not reduce the dictionary vocabulary."
       (erase-buffer)
       (buffer-disable-undo)
       (generate-lisp-file-heading ja-dic-filename 'skkdic-convert :code nil)
+      (insert (format ";; Generated with small ja-dic option: %s\n\n"
+                      (if no-reduction "no" "yes")))
       (insert ";; Original SKK dictionary file: "
 	      (file-relative-name (expand-file-name filename) dirname)
 	      "\n\n"

make-dist

@@ -357,6 +357,7 @@ possibly_non_vc_files="
   MANIFEST aclocal.m4 configure
   admin/charsets/jisx2131-filter
   src/config.in
+  leim/small-ja-dic-option
 "$(
   find admin doc etc lisp \
    \( -name '*.el' -o -name '*.elc' -o -name '*.map' -o -name '*.stamp' \