[Rd] Build R form source - manuals

[arnaud gaboury]

I built R form source succesfully on my Fedora 22 box. No errors.

I can read there is an issue with some manuals at build time when
running makeinfo, especially these two:
doc/manual/R-exts.texi
cp doc/manual/R-intro.texi
Some distro have hacks about makeinfo 5 in their build script.

I wonder if some manuals are broken but couldn't see it when running make.


May someone tells me more about this issue and what can I do to make
sure these manuals are correctly built.

Thank you


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