[Fedora-packaging] Why is hard-wired version dependency required by Packaging/Tcl?

[Tom Lane]

At https://fedoraproject.org/wiki/Packaging/Tcl I read

	Both arch-specific and noarch Tcl extensions MUST use
		Requires: tcl(abi) = 8.5

which seems more than a little bizarre when every other part of the page
tells you that you MUST avoid putting hard-wired Tcl version number
dependencies into your specfile.  And it also tells you exactly how to
extract the Tcl version dynamically.  So why isn't this a better
solution?

		Requires: tcl(abi) = %{tcl_version}


			regards, tom lane