Documentation/GNUmakefile: Missing dependencies for internals.texi

[Johannes Rohrer]

Dear LilyPond developers,

'make doc' generates the texinfo file for the Internals Reference from
ly/generate-documentation.ly, which in turn relies on scm/document*.scm
and their recursive dependencies to do the actual work. In the process,
settings encoded in various other files get documented, e.g. from
ly/engraver-init.ly and scm/define-*.scm.

Changes to such files do not necessitate, nor trigger, recompiling the
LilyPond binary; yet that is the only dependency marked:

--- Documentation/GNUmakefile, lines 287-288 ---
$(outdir)/internals.texi: $(LILYPOND_BINARY)
        cd $(outdir) && $(buildscript-dir)/run-and-check "$(LILYPOND_BINARY) 
--verbose $(top-src-dir)/ly/generate-documentation" "generate-documentation.log"
---

Obviously, this is inconvenient when hacking the Internals Reference,
so I would like to ask for the missing dependencies to be added.

Rather than tediously maintaining a specific list that grows incomplete
whenever the scope of the IR expands, I suggest to depend on
$(INIT_LY_SOURCES) and $(SCHEME_SOURCES) altogether, as in lines 7, 25
and 29 of make/ly-rules.make. Attached is a trivial patch that does
just that.

Best regards,

Johannes Rohrer

0001-Documentation-GNUmakefile-Add-dependencies-for-inter.patch
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