Update 3.7 and 3.8 Windows and macOS installer builds to tcl/tk 8.6.8

[terryjreedy]

BPO	32901
Nosy	@terryjreedy, @pfmoore, @ronaldoussoren, @tjguk, @ned-deily, @zware, @serhiy-storchaka, @zooba, @csabella, @miss-islington
PRs	bpo-32901: Update Tcl and Tk versions to 8.6.8 #5823 [3.7] bpo-32901: Update Tcl and Tk versions to 8.6.8 (GH-5823) #5831

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = 'https://github.com/zooba'
closed_at = <Date 2018-02-27.22:53:23.129>
created_at = <Date 2018-02-21.21:26:55.004>
labels = ['OS-mac', '3.8', '3.7', 'expert-tkinter', 'OS-windows']
title = 'Update 3.7 and 3.8 Windows and macOS installer builds to tcl/tk 8.6.8'
updated_at = <Date 2018-02-27.22:53:23.128>
user = 'https://github.com/terryjreedy'

bugs.python.org fields:

activity = <Date 2018-02-27.22:53:23.128>
actor = 'ned.deily'
assignee = 'steve.dower'
closed = True
closed_date = <Date 2018-02-27.22:53:23.129>
closer = 'ned.deily'
components = ['macOS', 'Tkinter', 'Windows']
creation = <Date 2018-02-21.21:26:55.004>
creator = 'terry.reedy'
dependencies = []
files = []
hgrepos = []
issue_num = 32901
keywords = ['patch']
message_count = 17.0
messages = ['312512', '312514', '312577', '312583', '312584', '312586', '312591', '312594', '312598', '312639', '312640', '312643', '312668', '312669', '313030', '313031', '313032']
nosy_count = 10.0
nosy_names = ['terry.reedy', 'paul.moore', 'ronaldoussoren', 'tim.golden', 'ned.deily', 'zach.ware', 'serhiy.storchaka', 'steve.dower', 'cheryl.sabella', 'miss-islington']
pr_nums = ['5823', '5831']
priority = None
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = None
url = 'https://bugs.python.org/issue32901'
versions = ['Python 3.7', 'Python 3.8']

[terryjreedy]

This should be done ASAP for most testing.

MacOS 64bit 3.7.0b1 links to 8.6.7. Whether that should be upgraded to 8.6.8 is up to Ned. I raised question on bpo-15663.

[zware]

This is on Steve these days due to the binary signing.

[zooba]

Yay, more work...

(btw Zach, nothing stopping you from putting the sources up for me :) I just need to hit the buttons to make the build.)

[ned-deily]

Yeah, we should do that for the macOS installers as well.

[zware]

True :). I'll get the sources up if I get a chance to do it before you do.

(Anyone else can feel free to take a crack at it as well, see https://github.com/python/cpython-source-deps/blob/master/README.rst for instructions that should hopefully work :))

[csabella]

I'll give it a shot. :-)

[zooba]

I'm already most of the way through doing the sources this time - just running into ssh/GitHub troubles getting them online.

[zooba]

Still working on this - X11 and the WinSDK aren't playing nicely together. I might need a special build configuration to build this, or to submit fixes (and apply patches) to Tk.

[terryjreedy]

Is "this will only be useful on Windows," in the source-deps readme still true? It appears that the tcl/tk tar.gz source is meant for Mac also. (IE, has Xcode project files.)
https://tcl.tk/software/tcltk/download.html

Looking ahead, there is an 8.7a1 release. I am hoping that 8.7 will be available for our 3.8, as it should include a rewritten Text widget that, among other things, will fix the slow long lines problem. Do we wait for 8.7 final or do we start testing and, if necessary, adapting _tkinter and tkinter with, say, their .b1?

[zooba]

New changeset efa6c76 by Steve Dower in branch 'master':
bpo-32901: Update Tcl and Tk versions to 8.6.8 (GH-5823)
efa6c76

[zooba]

The sources are just the original sources, so they could be useful on other platforms too.

The build on cpython-bin-deps is obviously only useful on Windows.

[miss-islington]

New changeset 74b7364 by Miss Islington (bot) in branch '3.7':
bpo-32901: Update Tcl and Tk versions to 8.6.8 (GH-5823)
74b7364

[zooba]

Windows is complete - leaving this open for Ned to resolve when the Mac installers are done.

[terryjreedy]

New build with 8.6.8 seems to work fine on my machine. Thanks.

I noticed that 'fetching tcl/tk 8.6.8' downloaded a pre-built binary instead of sources to build on my machine. Nice.

[ned-deily]

New changeset 9189e95 by Ned Deily in branch 'master':
bpo-32901: update macOS 10.9+ installer to Tcl/Tk 8.6.8
9189e95

[ned-deily]

New changeset a7edca7 by Ned Deily in branch '3.7':
bpo-32901: update macOS 10.9+ installer to Tcl/Tk 8.6.8
a7edca7

[ned-deily]

Terry:

Is "this will only be useful on Windows," in the source-deps readme still true? It appears that the tcl/tk tar.gz source is meant for Mac also.

The macOS installer builds do not use the cpython-source-deps repo.