Merge bmake-20230622

Merge commit '3e39ce563b9ba25883e5aa37d9799eda9e57c1e0'

Merge bmake-20230414

Merge commit '51d8a8b4ac1dd7265e891149e470a803906de2a7'

Merge bmake-20230208

Merge commit 'f4d51098686d961fc03dc5aa327619d0af3c9dcd'

Merge/update to bmake-20230126

Update to bmake-20220726

Merge commit '31a96ca5f0b6e5f8f7fa8cecf3a5c4354b3b096f'

Merge bmake-20211212

commit '2935fe8237c83c1dcb113dd5335733263e68e6fd'

Merge bmake-20201117

o allow env var MAKE_OBJDIR_CHECK_WRITABLE=no to skip writable
checks in InitObjdir. Explicit .OBJDIR target always allows
read-only directory.

o More code cleanup and ref

Merge bmake-20201117

o allow env var MAKE_OBJDIR_CHECK_WRITABLE=no to skip writable
checks in InitObjdir. Explicit .OBJDIR target always allows
read-only directory.

o More code cleanup and refactoring.

o More unit tests

MFC after: 1 week

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Update to bmake-20201101

Lots of new unit-tests increase code coverage.

Lots of refactoring, cleanup and simlpification to reduce
code size.

Fixes for Bug 223564 and 245807

Updates to dirdeps.mk

Update to bmake-20201101

Lots of new unit-tests increase code coverage.

Lots of refactoring, cleanup and simlpification to reduce
code size.

Fixes for Bug 223564 and 245807

Updates to dirdeps.mk and meta2deps.py

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Update to bmake-20200902

Lots of code refactoring, simplification and cleanup.
Lots of new unit-tests providing much higher code coverage.
All courtesy of rillig at netbsd.

Other significant change

Update to bmake-20200902

Lots of code refactoring, simplification and cleanup.
Lots of new unit-tests providing much higher code coverage.
All courtesy of rillig at netbsd.

Other significant changes:

o new read-only variable .SHELL which provides the path of the shell
used to run scripts (as defined by the .SHELL target).

o variable parsing detects more errors.

o new debug option -dl: LINT mode, does the equivalent of := for all
variable assignments so that file and line number are reported for
variable parse errors.

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Merge bmake-20200606

Relevant items from ChangeLog:

o dir.c: cached_stats - don't confuse stat and lstat results.
o var.c: add :Or for reverse sort.

Merge bmake-20200517

Changes since 20181221 are mostly portability related
hence the large gap in versions imported.

There are however some bug fixes, and a rework of filemon handling.
In NetBSD ma

Merge bmake-20200517

Changes since 20181221 are mostly portability related
hence the large gap in versions imported.

There are however some bug fixes, and a rework of filemon handling.
In NetBSD make/filemon/filemon_ktrace.c allows use of fktrace
and elimination of filemon(4) which has not had the TLC it needs.

FreeBSD filemon(4) is in much better shape, so bmake/filemon/filemon_dev.c
allows use of that, with a bit less overhead than the ktrace model.

Summary of changes from ChangeLog

o str.c: empty string does not match % pattern
plus unit-test changes
o var.c: import handling of old sysV style modifier using '%'
o str.c: refactor brk_string
o meta.c: meta_oodate, CHECK_VALID_META is too aggressive for CMD
a blank command is perfectly valid.
o meta.c: meta_oodate, check for corrupted meta file
earlier and more often.
* meta.c: meta_compat_parent check for USE_FILEMON
patch from Soeren Tempel
o meta.c: fix compat mode, need to call meta_job_output()
o job.c: extra fds for meta mode not needed if using filemon_dev
o meta.c: avoid passing NULL to filemon_*() when meta_needed()
returns FALSE.
o filemon/filemon_{dev,ktrace}.c: allow selection of
filemon implementation. filemon_dev.c uses the kernel module
while filemon_ktrace.c leverages the fktrace api available in
NetBSD. filemon_ktrace.c can hopefully form the basis for
adding support for other tracing mechanisms such as strace on
Linux.
o meta.c: when target is out-of-date per normal make rules
record value of .OODATE in meta file.
o parse.c: don't pass NULL to realpath(3)
some versions cannot handle it.
o parse.c: ParseDoDependency: free paths rather than assert

plus more unit-tests

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Update to bmake-20171028

Ignore empty MAKEOBJDIR[PREFIX]

Reported by: bdrewery

Import bmake-20170720

Includes fix for compat handling of interrupts.

Import bmake-20170711

Merge bmake-20170510

No-op change other than version update.

Merge bmake-20170420

Update to bmake 20170413

Merge bmake-20170301

Merge bmake-20161212

Update to bmake-20170818

This version has some new knobs for dealing with troublesome targets
in meta mode.

Merge bmake-20160606

o dir.c: extend mtimes cache to others via cached_stat()

Import bmake-20160604

Performace improvements for meta mode.

Merge bmake-20160512

Update to bmake-20160315

Archive member handling works again
meta mode, treat missing reads as for writes.

Update dirdeps.mk - much improved startup time.
Update meta.stage.mk - avoid ln when chmod

Update to bmake-20160315

Archive member handling works again
meta mode, treat missing reads as for writes.

Update dirdeps.mk - much improved startup time.
Update meta.stage.mk - avoid ln when chmod required.

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Merge bmake-20160307