These variable modifiers accept an optional timestamp in seconds, to
select which date to print. This feature is only used very rarely. The
NetBSD build doesn't use it at all, and the FreeBSD build mainly uses
the plain modifiers :gmtime and :localtime, but not their optional
argument :gmtime=1500000000.
Therefore, this change is not going to affect many builds. Those that
are indeed affected had been wrong all the time anyway.
At parse time, these errors stop the build, as intended. After that,
when the actual shell commands of the targets are expanded and run,
these errors don't stop anything, the build just continues as if nothing
had happened. This is a general problem with Var_Parse, see the many
"handle errors" markers in the code. Another problem is that on parse
errors, parsing continues and spits out spurious strings of the form
"mtime" and "ocaltime". This as well is a general problem with error
handling in make.
ok sjg
819ecf5275