scons-3.1.2

[Bruce Dubbs]

New point version.

[Bruce Dubbs]

Here is a summary of the changes since 3.1.1:

NOTE: The 4.0.0 Release of SCons will drop Python 2.7 Support

NEW FUNCTIONALITY

• Added debug option "action_timestamps" which outputs to stdout the absolute start and end time for each target.

REMOVED FUNCTIONALITY

• Turn previously deprecated debug options into failures: --debug=tree, --debug=dtree, --debug=stree, --debug=nomemoizer.
• Remove deprecated SourceSignatures, TargetSignatures
• Remove deprecated Builder keywords: overrides and scanner
• Remove deprecated env.Copy
• Remove deprecated BuildDir plus SConscript keyword build_dir

CHANGED/ENHANCED EXISTING FUNCTIONALITY

• Update Command() function to accept target_scanner, source_factory, and target_factory arguments. This makes Command act more like a one-off builder.
• Added support for "-imacros" to ParseFlags
• EXPERIMENTAL NEW FEATURE: Enable caching MSVC configuration If SCONS_CACHE_MSVC_CONFIG shell environment variable is set, SCons will cache the results of past calls to vcvarsall.bat to a file; integrates with existing memoizing of such vars. On vs2019 saves 5+ seconds per SCons invocation, which really helps test suite runs.

FIXES

• Fix suncxx tool (Oracle Studio compiler) when using Python 3. Previously would throw an exception. Resolved by properly handling tool version string output as unicode.
• Resolved a race condition in multithreaded Windows builds with Python 2 in the case where a child process is spawned while a Python action has a file open. Original author: Ryan Beasley.
• Fix CheckFunc detection code for Visual 2019. Some functions (e.g. memmove) were incorrectly recognized as not available.
• Fix stacktrace when using SCons with Python 3.5+ and SunOS/Solaris related tools.
• Latex: Avoid crash with UnicodeDecodeError on Python 3 when a Latex log file in non-UTF-8 encoding (e.g. containing umlauts in Latin-1 encoding when the fontenc package is included with \usepackage[T1]{fontenc}) is read.
• CmdStringHolder fix from issue #3428

IMPROVEMENTS

• Improved threading performance by ensuring NodeInfo is shared across threads. Results in ~13% improvement for parallel builds (-j# > 1) with many shared nodes.
• Improve performance of Entry.disambiguate() by making check for most common case first, preventing unnecessary IO.
• Improved DAG walk performance by reducing unnecessary work when there are no un-visited children.

[Bruce Dubbs]

Fixed at revision 22482.