Improve Makefiles.

Patch provided by Tomoaki Sato.

Makefile.am

@@ -5,7 +5,7 @@ AUTOMAKE_OPTIONS = subdir-objects
 ACLOCAL_AMFLAGS = -I m4
 
 docs:
-	$(MAKE) -C doc doc.ja all
+	$(MAKE) -C doc all && $(MAKE) -C doc.ja all
 .PHONY: docs
 
 SUBDIRS = src

Makefile.in

@@ -118,6 +118,8 @@ AM_V_at = $(am__v_at_@AM_V@)
 am__v_at_ = $(am__v_at_@AM_DEFAULT_V@)
 am__v_at_0 = @
 am__v_at_1 = 
+depcomp =
+am__depfiles_maybe =
 SOURCES =
 DIST_SOURCES =
 RECURSIVE_TARGETS = all-recursive check-recursive cscopelist-recursive \
@@ -218,14 +220,12 @@ AUTOMAKE = @AUTOMAKE@
 AWK = @AWK@
 CATALOG = @CATALOG@
 CC = @CC@
-CCDEPMODE = @CCDEPMODE@
 CFLAGS = @CFLAGS@
 COLLATEINDEX = @COLLATEINDEX@
 CPP = @CPP@
 CPPFLAGS = @CPPFLAGS@
 CYGPATH_W = @CYGPATH_W@
 DEFS = @DEFS@
-DEPDIR = @DEPDIR@
 DLLTOOL = @DLLTOOL@
 DOCBOOKSTYLE = @DOCBOOKSTYLE@
 DSYMUTIL = @DSYMUTIL@
@@ -302,9 +302,7 @@ abs_top_srcdir = @abs_top_srcdir@
 ac_ct_AR = @ac_ct_AR@
 ac_ct_CC = @ac_ct_CC@
 ac_ct_DUMPBIN = @ac_ct_DUMPBIN@
-am__include = @am__include@
 am__leading_dot = @am__leading_dot@
-am__quote = @am__quote@
 am__tar = @am__tar@
 am__untar = @am__untar@
 bindir = @bindir@
@@ -366,15 +364,15 @@ $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am  $(am__confi
 	@for dep in $?; do \
 	  case '$(am__configure_deps)' in \
 	    *$$dep*) \
-	      echo ' cd $(srcdir) && $(AUTOMAKE) --gnu'; \
-	      $(am__cd) $(srcdir) && $(AUTOMAKE) --gnu \
+	      echo ' cd $(srcdir) && $(AUTOMAKE) --foreign --ignore-deps'; \
+	      $(am__cd) $(srcdir) && $(AUTOMAKE) --foreign --ignore-deps \
 		&& exit 0; \
 	      exit 1;; \
 	  esac; \
 	done; \
-	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu Makefile'; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --foreign --ignore-deps Makefile'; \
 	$(am__cd) $(top_srcdir) && \
-	  $(AUTOMAKE) --gnu Makefile
+	  $(AUTOMAKE) --foreign --ignore-deps Makefile
 Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
 	@case '$?' in \
 	  *config.status*) \
@@ -826,7 +824,7 @@ uninstall-am:
 
 
 docs:
-	$(MAKE) -C doc doc.ja all
+	$(MAKE) -C doc all && $(MAKE) -C doc.ja all
 .PHONY: docs
 
 # Tell versions [3.59,3.63) of GNU make to not export all variables.