Re: a couple more questions about variables and scope

[Paul D. Smith]

%% "Robert P. J. Day" <address@hidden> writes:

  rpjd> but that's clearly not enough.  in addition, that make variable
  rpjd> would also have to be exported so that it was available to all
  rpjd> submakes, as an environment variable would be.

  rpjd> perhaps a better question might be, at the beginning of the
  rpjd> make, how *exactly* are environment variables added to the mix
  rpjd> so that, once that processing is done, is there any record that
  rpjd> those variables came from the calling environment as opposed to,
  rpjd> say, being set as make variables and then exported?  does make
  rpjd> distinguish between those two?

When make starts, all the environment variables are automatically
created as make variables.  They are marked as exported.

When a variable in a makefile is exported it is also marked as exported.

When make invokes a subprocess it goes through the make variables and
takes everything marked as exported, and puts it into the environment of
the subprocess.


So no, there is no distinction made.

-- 
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