Listing Variables to be set under pkgsrc installation (pkg env variables?)

[Michael Kell Jensen <mkj%micrun.net@localhost>]

Is there a way to see every message for all the packages involved
When installing on pkgsrc application.
Not the MESSAGES files. but the notes about what environment variables
can be set under compilation etc.

When a application package is dependent on many other packages it is
hard  to see which variables can be changed.
Because they are scrolled by with a lot of other information.
is there a way to see beforehand which variables can be set and affected
 before installing an application.

Example could be ZSH_STATIC. which is seen when compiling the ZSH shell.
It is relavitely easy to catch, but when compiling larger applications.
It is hard to see (and normally i doent sit and look at all the output
while compiling :) )

Or is there a better way!?


Regards cognacc