Update to bmake-20200704

Key changes include reduced noise at end of failed build log
and avoid evaluation of unnecessary terms in conditionals.

MFC after: 1 week

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o meta.c: when target is out-of-date per normal make rules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

show more ...

Merge bmake-20181221

Merge bmake-20180512

Skip polling job token pipe,
better handle sysV style includes with variables.

Update to bmake-201802222

Fixes segfault in Var_Set if val is NULL
Don't treat .info as warning with -W

Merge bmake-20170510

No-op change other than version update.

Merge bmake-20170420

Merge bmake-20170301

Merge bmake-20161212

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.

show more ...

Merge bmake-20160307

Merge bmake-20151201

ParseTrackInput: do not access beyond end of buffer.

Reviewed by: dim

Merge bmake 20151020

Merge bmake-20150418

PR: 199486

Update to bmake-20140620
Main change is detection of malformed variable references.

Reviewed by: obrien

Merge bmake-20140101 from vendor

Merge bmake-20130904

ParseGetLine: don't treat a zero byte as end of buffer if P_end says it isn't.
Consume up to next newline, and issue a parse warning.
If no newline found before P_end, carry on as before.

Merge bmake-20130730
Main feature of interest is .MAKE.JOB.PREFIX=
to suppress --- job --- tokens.

Fix use after free bug.
Parse_SetInput:
curFile->fname was using the buffer passed to it - which ReadMakefile frees.
This change makes the comment in ParseEOF about leaking curFile->fname true.

Update to bmake-20130330

Merge bmake-20120831 from vendor/NetBSD/bmake/dist.

Provenance: ftp://ftp.netbsd.org/pub/NetBSD/misc/sjg