4.5.1 Release

A new SCons release, 4.5.1, is now available on the SCons download page:

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

Here is a summary of the changes since 4.5.0:

FIXES

• Fix a problem in 4.5.0 where using something like the following code
  will cause a Clone()'d environment to share the CPPDEFINES with the
  original Environment() which was cloned. Causing leakage of changes
  to CPPDEFINES when they should be completely independent after the Clone.
  env=Environment(CPPDEFINES=['a'])
  env.Append(CPPDEFINES=['b']) (or AppendUnique,Prepend,PrependUnique)
  env1=env.Clone()
  env1.Append(CPPDEFINES=['c']) (or any other modification, but not overwriting CPPDEFINES)
  Now env['CPPDEFINES'] will contain 'c' when it should not.

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

git shortlog --no-merges -ns 4.5.0..HEAD

     3  William Deegan
     1  Mats Wichmann