Restore depfile toleration of multiple output paths on distinct lines
Prior to introduction of depfile parser handling of multiple rules,
ninja silently accepted a depfile of the form:
out: in1 in2 in3
other: otherIn1 otherIn2 otherIn3
and incorrectly treated `other` and `otherIn*` as additional inputs to
`out`. Now we prefer to reject this just as we already do for a depfile
specifying multiple outputs on one line. However, this can break
existing cases where such a depfile was silently tolerated.
Add a `-w depfilemulti={err,warn}` option to control this behavior,
and make it just a warning by default.
11 files changed
