[Rd] as-cran issue ==> set _R_CHECK_LENGTH_1_* settings!

[Abby Spurdle]

> Which version of Fedora are you on?

I've got Fedora 31.
I just checked, and R 3.6.2 is available now.

Progress...
...however, there's another problem.

>From the dependencies:
R-java                   x86_64 3.6.2-1.fc31           updates  10 k
R-java-devel             x86_64 3.6.2-1.fc31           updates 9.9 k
java-1.8.0-openjdk       x86_64 1:1.8.0.232.b09-0.fc31 updates 281 k
java-1.8.0-openjdk-devel x86_64 1:1.8.0.232.b09-0.fc31 updates 9.3 M
java-1.8.0-openjdk-headless
                         x86_64 1:1.8.0.232.b09-0.fc31 updates  32 M

So, Linux's R (or at least Fedora's R) is dependent on Java.
-> Bad idea...

I'm using OpenJ9, so I can't install R like this without causing
significant problems.
(But please someone correct me if I'm wrong).

I will allocate some time to investigate Dirk's suggestions, however, I'm
thinking the best option is to continue using *Windows* as my primary OS,
and build Linux versions of R from source.

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