Also fix handling of sysV substitutions when lhs and variable are empty.
Also that modifiers do not cause errors during conditional tests
when undefined variables should otherwise be ok.
Ie. .if defined(nosuch) && ${nosuch:Mx} != ""
continue". This has been there since 1.1 but I don't think it was
intentional. If anyone actually cares about the blank line being there
for some reason, go ahead and revert this change...
from the parsing goo. This will now use mmap for reading if it works and
fall back to read only for pipes and such. Step 1 of a cleanup program
proposed without objection on tech-toolchain.
but if the file in question is one that needs to be compiled (.c or .cc),
it still hands the bogus name to the compiler.
If Dir_MTime() cannot find such a file (gn->iParents is not empty),
see if the basename can be found via .PATH, and if so set gn->path to
the found file. This prevents the stale path being given to the
compiler.
In meta_oodate(), if a referenced file no longer exists, consider the
target out-of-date.
Also, if meta_oodate() decides a target is out-of-date, and it
it uses .OODATE in its commands, we need .OODATE recomputed.
Undo our call to Make_DoAllVar() so that the call from Make_OODate()
will do the right thing.
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).
If we encounter an error and run the .ERROR target, we may
reap a pid which jobs is waiting for. Ensure that we
cleanup so that make isn't left waiting for an already
deceased child.
As the comment says in JobPrintJob set JOB_IGNERR with - commands. Fix
whitespace so that the output is consistent, although there are two separate
execution logic implementations (command.c, job.c)
defined even in cases where the suffix search logic is skipped, such
as .PHONY targets, and fixes PR 43534.
Note: because .PHONY targets do not get suffix searching, .PREFIX will
not have any suffixes removed. This seems vaguely logical, although
it's not the only reasonable interpretation.
We may also want to reconsider whether suffix rules are skipped for
phony targets, too. That behavior is somewhat counterintuitive.
