Re: Advertising second_expansion

[Paul D. Smith]

%% Alessandro Vesely <address@hidden> writes:

  av> A tool that computes dependencies needs to know if SECONDEXPANSION
  av> is enabled, so it can escape '$'s correctly. Each tool can provide
  av> for its own command line switch, or should there be an
  av> automatically exported global variable, say MAKE_SECONDEXPANSION?

This is not necessarily a bad idea (although I wouldn't do it like that)
However, now that .SECONDEXPANSION is optional it's almost a per-target
capability (or would be, if we had a way to turn it off again...)  That
implies that this variable would need to be set differently for
different targets.

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