4.5.2 Release

A new SCons release, 4.5.2, is now available on the SCons download page:

https://scons.org/pages/download.html

Here is a summary of the changes since 4.5.1:

FIXES

• Fix a problem (#4321) in 4.5.0/4.5.1 where ParseConfig could cause an
  exception in MergeFlags when the result would be to add preprocessor
  defines to existing CPPDEFINES. The following code illustrates the
  circumstances that could trigger this:
  env=Environment(CPPDEFINES=['a'])
  env.Append(CPPDEFINES=['b'])
  env.MergeFlags({'CPPDEFINES': 'c'})

PACKAGING

• Remove the redundant wheel dependency from pyproject.toml,
  as it is added automatically by the setuptools PEP517 backend.

Thanks to the following contributors listed below for their contributions to this release.

.. code-block:: text

git shortlog --no-merges -ns 4.5.1..HEAD
 3  Mats Wichmann
 2  William Deegan
 1  Michał Górny