Re: [PATCH 1/1] Avoid multiple patterns when recipes generate one file

[Paul Smith <psmith@gnu.org>]

On Mon, 2022-11-28 at 14:08 +0100, Ævar Arnfjörð Bjarmason wrote:
> Whether we use eval/define or not (I just tried to avoid the
> repetition) I think referring to $(DOC_MAN[157]) here probably makes
> more sense if we're poking at these rules.
> 
> I.e. in this case the rest of the Makefile is carrying forward what
> manpages we're generating exactly, so rather than a wildcard %.1 to
> %.xml we can narrow it down to just the %.1 files we're going to b
> generating (but maybe that's best left for later...):

I have no opinion on which is better :).

I'm not sure what the above comment is asking for though: are you going
to take over pushing this change?  Or do you want me to reroll the
commit with these changes instead?  Or are we waiting for more
opinions?

> diff --git a/Documentation/Makefile b/Documentation/Makefile
> index 5e1a7f655c2..7404cead084 100644
> --- a/Documentation/Makefile
> +++ b/Documentation/Makefile
> @@ -351,8 +351,12 @@ $(OBSOLETE_HTML): %.html : %.txto $(ASCIIDOC_DEPS)
>  manpage-base-url.xsl: manpage-base-url.xsl.in
>         $(QUIET_GEN)sed "s|@@MAN_BASE_URL@@|$(MAN_BASE_URL)|" $< > $@
>  
> -%.1 %.5 %.7 : %.xml manpage-base-url.xsl $(wildcard manpage*.xsl)
> -       $(QUIET_XMLTO)$(XMLTO) -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $<
> +define doc-man-tmpl
> +$$(DOC_MAN$(1)): %.$(1) : %.xml manpage-base-url.xsl $$(wildcard manpage*.xsl)
> +       $$(QUIET_XMLTO)$$(XMLTO) -m $$(MANPAGE_XSL) $$(XMLTO_EXTRA) man $$<
> +
> +endef
> +$(eval $(foreach n,1 5 7,$(call doc-man-tmpl,$(n))))
>  
>  %.xml : %.txt $(ASCIIDOC_DEPS)
>         $(QUIET_ASCIIDOC)$(TXT_TO_XML) -d manpage -o $@ $<