[GNC] How to Upgrade from GNU 4.11 to latest version (5.21)

[Stan Brown (using GC 4.14)]

On 2025-09-24 17:04, Paul Kroitor wrote:
> Well, perhaps, but assuming a dev put code in version X.00 to migrate an older structure used in version X-1.yy, who would ever remove that migration code in subsequent versions in the version X line?
> 
> In other words, if 5.00 has migration code to convert from 4.x, surely that code is still in 5.12.

I think that must be true. Otherwise the standard advice, which is to
upgrade to last sub-version of each major version (2.x, 3.x, 4.x, 5.x)
would make no sense.

Stan Brown
Tehachapi, CA, USA
https://BrownMath.com