Glenn Johnson 909c5f5019 Add variants for tk package (#11956) ... TK can be built with support for libXft and X Screensaver. Both of these are turned on in the Tk configure script. That means the system libraries will get picked up if they are on the system and nothing is specified in the package. Since the default for both of them is 'True' I set the default value for the variants to 'True'.		2019-07-11 22:21:17 -05:00
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spack	Add variants for tk package (#11956)	2019-07-11 22:21:17 -05:00