Building R 4.5.0 from source on Fedora 42 hits problems because 42 ships with Tcl/Tk 9. tcl8-devel and tk8-devel are available and can be used, but I haven't yet found a viable incantation yet. Neither R released nor devel support Tcl/Tk 9 https://www.tcl-lang.com/software/tcltk/9.0.html.
Building against external BLAS is also not self-evident, so may need guidance.
Any suggestions welcome!
Roger
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Roger Bivand
Emeritus Professor
Department of Economics
Norwegian School of Economics, Bergen, Norway