1 If you are reading this in the git repository, the contents
2 refer to *unreleased* changes since the last SCons release.
3 Past official release announcements appear at:
5 https://scons.org/tag/releases.html
7 ==================================================================
9 A new SCons release, 4.8.1, is now available on the SCons download page:
11 https://scons.org/pages/download.html
14 Here is a summary of the changes since 4.8.0:
19 - List new features (presumably why a checkpoint is being released)
21 DEPRECATED FUNCTIONALITY
22 ------------------------
24 - List anything that's been deprecated since the last release
26 CHANGED/ENHANCED EXISTING FUNCTIONALITY
27 ---------------------------------------
29 - env.Dump() previously accepted a single optional "key" argument.
30 It now accepts any number of optional "key" arguments; any supplied
31 keys will be serialized with their values in a Python dict style.
32 As a result there is a small change in behavior: if a *single* key
33 argument is given, where it previously would return a string containing
34 just the value, now it will return a string that looks like a dictionary
35 including the key. For example, from "'gcc'" to "{'CC': 'gcc'}".
36 This should not have any impact as the result of calling Dump is
37 intended for diagnostic output, not for use by other interfaces.
42 - SCons 4.8.0 added an `__all__` specifier at the top of the Variables
43 module (`Variables/__init__.py`) to control what is made available in
44 a star import. However, there was existing usage of doing
45 `from SCons.Variables import *` which expected the variable *types*
46 to be avaiable. `BoolVariable`, `EnumVariable`, `ListVariable`,
47 `PackageVariable` and `PathVariable` are added to `__all__`,
48 so this form of import should now work again.
53 - List improvements that wouldn't be visible to the user in the
54 documentation: performance improvements (describe the circumstances
55 under which they would be observed), or major code cleanups
60 - List changes in the way SCons is packaged and/or released
65 - Improve wording of manpage "Functions and Environment Methods" section.
66 - Make doc function signature style more consistent - tweaks to AddOption,
67 DefaultEnvironment and Tool,.
73 - sctypes `is_*` functions given explicit return types. Python 3.13+ uses
74 `TypeIs` for a near-equivalent of `isinstance`. Python 3.10 through 3.12
75 uses `TypeGuard`, a less accurate implementation but still provides
76 usable type hinting. Python 3.9 and earlier simply returns `bool`, same
79 Thanks to the following contributors listed below for their contributions to this release.
80 ==========================================================================================
83 git shortlog --no-merges -ns 4.0.1..HEAD