[plt-scheme] planet & native extension flags?

I did such things (finding a library) by getenv:

(getenv name-string) gets the value of an operating system environment variable.

Sincerely,
Chongkai Zhu

======= At 2006-02-25, 01:09:03 Brent Fulgham wrote: =======

>
>Is there an easy way to force planet to use particular flags when  
>building extensions?  For example, I'd like to build the sqlid.plt  
>libraries, but it can't easily find my PostgreSQL installation -- but  
>I don't see how to tell it where to find it (without creating links  
>to the appropriate directories).
>
>Am I missing something from the manual?
>
>Thanks,
>
>- -Brent