[Octave-bug-tracker] [bug #45574] 'make maintainer-clean' does not remove all temporary doc files

[Mike Miller]

Follow-up Comment #2, bug #45574 (project octave):

I see that your changeset

http://hg.savannah.gnu.org/hgweb/octave/rev/87f337783d95

introduced t2d_cache, presumably sharing makeinfo intermediate files sped up
the build? This change also forced the build to be done sequentially because
of that very reason.

The current build has


$ grep "TEXI.*build-dir" Makefile
TEXI2DVI = texi2dvi --build-dir=t2d_cache
TEXI2PDF = texi2pdf --build-dir=t2d_cache
#       $(TEXI2DVI) $(AM_V_texinfo) --build-dir=$(@:.dvi=.t2d) -o $@
$(AM_V_texidevnull) \
#       $(TEXI2PDF) $(AM_V_texinfo) --build-dir=$(@:.pdf=.t2p) -o $@
$(AM_V_texidevnull) \
        $(TEXI2DVI) $(AM_V_texinfo) --build-dir=$(@:.dvi=.t2d) -o $@
$(AM_V_texidevnull) \
        $(TEXI2PDF) $(AM_V_texinfo) --build-dir=$(@:.pdf=.t2p) -o $@
$(AM_V_texidevnull) \
        $(TEXI2DVI) $(AM_V_texinfo) --build-dir=$(@:.dvi=.t2d) -o $@
$(AM_V_texidevnull) \
        $(TEXI2PDF) $(AM_V_texinfo) --build-dir=$(@:.pdf=.t2p) -o $@
$(AM_V_texidevnull) \


So looks like the t2d_cache is not being used anymore, at least by the
doc/interpreter and doc/liboctave builds.

And I think the reason for overriding the --build-dir option is so the
subdirectory is used rather than making the intermediate directory at the
top-level.

I know that we can't use NOTPARALLEL anymore since we are non-recursive now,
but I don't know what the current tradeoffs are in terms of sharing files
between a couple of makeinfo calls versus being able to execute them in
parallel. Especially now that we could have users building with Texinfo
version 4, 5, or 6.

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