NEW IN WAF 1.9
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* General enhancements:
- Detect Clang first on many platforms, in particular on FreeBSD #1528
- Remove Node.cache_sig and Node.sig so that dependencies involve file contents by default #1580
- Change cflags in the beginning / cppflags at the end #1505
- Merge ${FOO}${BAR} flags in commands executed without a shell (no spaces inserted)
- Interpret empty command-line defines as integer values for dependency calculation #1704
- Waf tools are not cached on "waf configure" by default anymore; pass conf.load(.., cache=True)
- Enable a consistent progress bar output #1641
- Add ${VAR?X} constructs in script expressions to enable simple conditional outputs
- Enable 'waf dist' to package arbitrary symlinks in tarballs #1719
- Enable regexp objects in @extension besides strings for file extensions
- Match extensions in the order of last definition
- Task generators are now processed group-by-group, so the next task generators are
processed when all tasks in a previous group are complete; bld.post_mode=POST_LAZY
becomes thus the default (playground/dynamic_build/ examples)
- Process Qt5 files in the way suggested by the Qt documentation
- Installation methods install_files/install_as/symlink_as create regular task generators
and regular tasks so that installation outputs can be re-used easily
- Subclass waflib.Build.ConfiguredContext to enable configuration-dependent user commands
- Enable @argfile procesing in Task.exec_command when argument limits are exceeded
- Apply optional tsk.env.PATH values in Task.exec_command
- Enable ut_str to process scriptlet expressions for C/C++ unit tests
- Minimize the amount of paths added to unit test environment variable
- Restore configuration values with Configure.autoconfig='clobber' #1758
- Rebuilds are applied on file contents so that update_outputs is no longer needed
* Performance highlights:
- Reduce the key size in bld.task_sigs by adding bld.node_sigs and bld.imp_sigs
- Remove __hash__ and __eq__ from Context, Node and Task #1629
- Detect visual studio versions lazily by default
- Remove the uses of run_once that can consume a lot of memory; add a proper LRU cache
- Enable pre-forked builds by default to achieve faster builds, up to 2x speedup on short-lived processes
- Enable faster consumers in Runner.py
- Add the tool 'nobuild.py' to help with performance troubleshooting
- Enable profiling with the --profile command-line option
* API changes:
- The minimum Python version required is Python 2.5
- Add Task.get_cwd()
- Remove the command called 'update'
- Remove unused variables and functions:
- TaskBase.attr()
- Build.POST_BOTH
- Options.platform
- Options.cmds
- Task.dep_vars (define Task.vars on instances if necessary)
- Utils.nogc
- Configure.err_handler
- All duplicate split() functions from Utils
- Remove the unused attribute 'mac_resources', use 'mac_files' instead (see demos/mac_app)
- Remove qt4 and kde4 from the default modules
- Refactor msvc.py
- Task.sig_vars, Task.sig_explit_deps and Task.sig_implicit_deps return None
- Use relative paths in apply_incpaths by default (and absolute ones when paths cross drives)
- Modify Utils.run_once so that it accepts a list of *args
- Better consistency between check_cfg and check_cc variables
- task_gen.mapping and task_gen.prec are not defined by default on instances anymore, but
instances can still define their own mappings to override the defaults, but in
that case all mappings/precedences must be present. These features were not used in Waf 1.8.
- Do not truncate _task suffixes from Task class names if present
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