1. add -w flag to print Entering and Leaving directory name the the beginning
and the end of processing.
2. export MAKELEVEL=$((MAKELEVEL + 1)) only in the child environment.
3. when printing error messages, prefix them with the program name [$MAKELEVEL]
for $MAKELEVEL > 0
4. if $MAKEFLAGS consists only of letters assume it is a set of flags (as
allowed by posix), convert them to -f -l -a -g -s, so that they get parsed
properly.
With those fixes gmake -> bmake -> gmake -> bmake etc. works as expected.
Rather than apply it to the whole script, just the current command line
is affected. This allows a trick like ${.OODATE:M.NOMETA_CMP}
to cause command comparison to be supressed for one command only.
behavior in jobs vs non-jobs mode.
Move the comment about when shell is skipped to this discussion
from COMPATABILITY.
Remove the incorrect statement about default mode being somehow
neither jobs mode or compat mode (it is compat mode).
The default retains the traditional NetBSD behavior, but the knob
can be set so that FreeBSD can retain their expected behavior.
This is a compromise to be sure.
Add a debug flag -dV to override the above, so that regardless of
the knob setting, the raw value of a variable can be easily seen.
These capture all the interesting data - useful for debugging.
In such cases there is no need to replicate commands in the build log.
Rather than run the entire build .SILENT, allow meta mode to set that flag
per target iff a .meta file is created.
Normal behavior is retained for targets where no .meta file is created,
ensuring that no build data is lost.
meta_oodate: if a file that was written or linked within our bailiwick,
but outside of .OBJDIR is missing, add it to missingFiles.
If we get to the end of the .meta file without seeing it [re]moved,
then consider the target out-of-date.
In this mode, a .meta file is created for each target, capturing
the expanded commands used, any command output, and if filemon(9)
is available, a record of system calls which are of interest.
Not enabled unless USE_META=yes is set when building make.
Also, if FILEMON_H exists, meta.c will be compiled to use filemon(9).
