Use major version number only for runtime directory name.

[edelsohn]

Fedora now is installing the GCC runtime with only the major version number. Because each major release now updates the major version number and the runtime should be compatible within a major release, this would seem to make more sense. This places the runtime and any updates in the same version directory (8, 9, 10) and applications built against an earlier minor release automatically would look in the same directory.

There is a GCC configure option for this
--with-gcc-major-version-only

[tuliom]

According to the GCC documentation:

Specifies that GCC should use only the major number rather than major.minor.patchlevel in filesystem paths.

That's a nice new feature.

That may require changes to ck_binaries too.
If this happens, we may need a mechanism to update GCC version automatically or to continue alerting us when it changes.