{.,docs,docs/man}/Makefile.am: add "all-man" target to build all poss…

…ible man pages (vs ones for enabled drivers), and weave this and check targets to parent makefiles

Makefile.am

@@ -108,7 +108,14 @@ spellcheck spellcheck-interactive:
 	(cd $(builddir)/data && $(MAKE) -s $@) || RES=$$? ; \
 	exit $$RES
 
-doc spellcheck-sortdict:
+# Note: the "all-docs" and "check-docs" targets may require tools not
+# found by `configure` script (and so avoided by conventional recipes)
+# such as PDF generators, so it should only be called at developer's
+# discretion, choice and risk. The "check-man" targets covers source
+# texts, man pages and HTML rendering of man pages, as enabled by tools.
+doc spellcheck-sortdict \
+all-docs check-docs \
+man all-man man-man check-man man-html all-html:
 	cd $(srcdir)/docs && $(MAKE) $@
 
 # This target adds syntax-checking for committed shell script files,

docs/Makefile.am

@@ -87,7 +87,7 @@ doc: @DOC_BUILD_LIST@
 
 # This target can be called by developers to go around the configure
 # script choices at their risk (e.g. missing tools are possible):
-docs: pdf html-single html-chunked man
+docs: pdf html-single html-chunked man-man html-man
 
 all-docs: docs
 
@@ -130,7 +130,10 @@ check-html-chunked: $(ASCIIDOC_HTML_CHUNKED)
 
 # Note: usually the results from man-page check will be reported twice:
 # once as a SUBDIRS child makefile, and once via DOC_CHECK_LIST expansion
-check-man:
+# Note: default `make all` in the man directory caters to drivers etc.
+# chosen during configure script execution. The "all-man" and "all-html"
+# rules build everything documented.
+check-man all-man man-man all-html html-man:
 	cd $(top_builddir)/docs/man/ && $(MAKE) -f Makefile $@
 
 man:

docs/man/Makefile.am

@@ -735,7 +735,11 @@ HTML_MANS = \
 
 all:
 
-html-man: $(HTML_MANS) index.html
+all-html html-man: $(HTML_MANS) index.html
+
+# Have a way to build all man pages, not just those that fit currently
+# configured drivers, daemons, developer aspect, etc.
+all-man man-man: $(MAN_MANS)
 
 if WITH_MANS
 if ! SKIP_MANS