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A new SCons release, 4.0.0, is now available
on the SCons download page:
https://scons.org/pages/download.html
Here is a summary of the changes since 3.1.2:
NEW FUNCTIONALITY
- Added support for scanning multiple entries in an action string if
IMPLICIT_COMMAND_DEPENDENCIES is set to 2 or 'all'. This enables more thorough
action scanning where every item in each command line is scanned to determine
if it is a non-source and non-target path and added to the list of implicit dependencies
for the target.
- Added new module SCons.Scanner.Python to allow scanning .py files.
- Added support for explicitly passing a name when creating Value() nodes. This may be useful
when the value can't be converted to a string or if having a name is otherwise desirable.
- Added a new flag called "linedraw" for the command line argument "--tree"
that instructs scons to use single line drawing characters to draw the dependency tree.
DEPRECATED FUNCTIONALITY
- Drop support for Python 2.7. SCons will be Python 3.5+ going forward.
- Remove deprecated SourceCode()
CHANGED/ENHANCED EXISTING FUNCTIONALITY
- Added check for SONAME in environment to setup symlinks correctly (Github Issue #3246)
- Resolve Issue #3248 - Removing '-Wl,-Bsymbolic' from SHLIBVERSIONFLAGS
NOTE: If your build depends on the above you must now add to your SHLIBVERSIONFLAGS
- Microsoft Visual Studio - switch to using uuid module to generate GUIDs rather than hand rolled
method using md5 directly.
NOTE: This change affects the following builders' output. If your build depends on the output of these builders
you will likely see a rebuild.
* Package() (with PACKAGETYPE='msi')
* MSVSSolution()
* MSVSProject()
- Improve Visual Studio solution/project generation code to add support
for a per-variant cppflags. Intellisense can be affected by cppflags,
this is especially important when it comes to /std:c++* which specifies
what C++ standard version to target. SCons will append /Zc:__cplusplus
to the project's cppflags when a /std:c++* flag is found as this is
required for intellisense to use the C++ standard version from cppflags.
- Allow user specified location for vswhere.exe specified by VSWHERE.
NOTE: This must be set at the time the 'msvc' 'msvs' and/or 'mslink' tool(s) are initialized to have any effect.
FIXES
- Cleanup dangling symlinks before running builders (Issue #3516)
- Fixed usage of abspath and path for RootDir objects on Windows. Previously
env.fs.Dir("T:").abspath would return "T:\T:" and now it correctly returns "T:".
- Fix Issue #3469 - Fixed improper reuse of temporary and compiled files by Configure when changing
the order and/or number of tests. This is done by using the hash of the generated temporary files
content and (For the target files) the hash of the action.
So where previously files would be named:
- config_1.c, config_1.o, config_1
The will now be named (For example)
- conftest_68b375d16e812c43e6d72d6e93401e7c_0.c,
conftest_68b375d16e812c43e6d72d6e93401e7c_0_5713f09fc605f46b2ab2f7950455f187.o
or
conftest_68b375d16e812c43e6d72d6e93401e7c_0.o
conftest_68b375d16e812c43e6d72d6e93401e7c_0_5713f09fc605f46b2ab2f7950455f187 (for executable)
IMPROVEMENTS
- Improve performance of Subst by preventing unnecessary frame
allocations by no longer defining the *Subber classes inside of their
respective function calls.
- Improve performance of Subst in some cases by preventing
unnecessary calls to eval when a token is surrounded in braces
but is not a function call.
- Improve performance of subst by removing unnecessary recursion.
PACKAGING
- Resolve Issue #3451 and Issue #3450 - Rewrite SCons setup.py and packaging. Move script logic to entry points so
package can create scripts which use the correct version of Python.
DOCUMENTATION
- List any significant changes to the documentation (not individual
typo fixes, even if they're mentioned in src/CHANGES.txt to give
the contributor credit)
DEVELOPMENT
- List visible changes in the way SCons is developed
Thanks to CURLY, LARRY, and MOE for their contributions to this release.
Contributors are listed alphabetically by their last name.
__COPYRIGHT__
__FILE__ __REVISION__ __DATE__ __DEVELOPER__
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