[MacPorts] #63749: RFE: gcc-devel @12-20211024: add a `+docs` variant (or sub-port)

[MacPorts]

#63749: RFE: gcc-devel @12-20211024: add a `+docs` variant (or sub-port)
-------------------------+-----------------------
 Reporter:  cooljeanius  |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:  2.7.1
 Keywords:               |       Port:  gcc-devel
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 I recently made a commit to GCC allowing its dvi-formatted documentation
 to be installed:
 https://gcc.gnu.org/git/?p=gcc.git;a=commitdiff;h=c3e80a16af287e804b87b8015307085399755cd4

 I would like to have MacPorts take advantage of this new Makefile target,
 as well as the other Makefile targets available for installing
 documentation (`install-pdf` and `install-html`). Thus, I propose a new
 `+docs` variant that would do this (either that, or a `gcc-devel-docs`
 sub-port). The changes required ought to be simple: just add `build
 .target-append info html pdf dvi` and `destroot.target-append install-html
 install-pdf install-dvi` lines to the variant (or sub-port). I am still
 investigating which additional dependencies this would drag in, but I'm
 assuming it'll be at least py-sphinx and various texlive ports (texinfo is
 already listed as a dependency). Note that it may be necessary for this
 upstream bug to be fixed first:
 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102824

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Ticket URL: <https://trac.macports.org/ticket/63749>
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