Merge bmake-20240309

Merge commit '368b06ce6b0135d6de13f7265f6dcbaeb791b3bb'

Merge bmake-20230414

Merge commit '51d8a8b4ac1dd7265e891149e470a803906de2a7'

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.

Merge bmake-20160512

Merge bmake-20160307

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

Reviewed by: obrien

Merge bmake-20130123

Approved by: marcel (mentor)

Merge bmake-20230414

Merge commit '51d8a8b4ac1dd7265e891149e470a803906de2a7'

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.

Merge bmake-20160512

Merge bmake-20160307

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

Reviewed by: obrien

Merge bmake-20130123

Approved by: marcel (mentor)