install rtools40 if needed

[jeroen]

rtools40 will soon not be preinstalled anymore on GHA, this installs it if needed.

TYPE: NO_HISTORY

[eddelbuettel]

Thanks @jeroen -- to clarify this is needed only for the 32 bit builds for what is now old-old-rel aka R 4.1.* ? Which we could (and maybe should ?) also turn off, correct?

[jeroen]

You need rtools40 for the dependencies and pacman build system:

https://github.com/TileDB-Inc/TileDB/blob/dev/.github/workflows/build-rtools40.yml#L30

If you don't care about R-4.1 support, you can indeed remove MINGW64 and MINGW32 from the build matrix, and only keep UCRT64, which is what is used for R-4.2 and up.

[jeroen]

GitHub has now deployed their updated windows images, so I suspect your builds will start failing until you merge this.

[eddelbuettel]

@ihnorton Should we merge this, unrelated CI fails notwithstanding? Change is only to the rtool40 yaml file.

[ihnorton]

Thanks @jeroen.

[teo-tsirpanis]

This PR seems to be responsible for CI failures. https://github.com/TileDB-Inc/TileDB/actions/runs/4830151383/jobs/8606020094

[ihnorton]

@jeroen chocolatey claims that rtool43 is already installed:

By installing, you accept licenses for the packages.
A newer version of rtools (v4.3.5550) is already installed.
 Use --allow-downgrade or --force to attempt to install older versions, or use --side-by-side to allow multiple versions.

However I don't see it on the runner-images software list (https://github.com/actions/runner-images).

[jeroen]

Thanks! I think it should be fixed now, can you retry the build?

[teo-tsirpanis]

It works, thanks!