[poky] Not able to set env var from anon function

[Nithyakala Sainath]

Hello all,

I was playing with environmental variables and datastore that I fell into
this situation:

In a reccipe a.bb

export TEMPDIR = "temp"

python() {
        os.environ["TEMPDIR"] = "randomvalue"
}

do_compile() {
        echo ${TEMPDIR }
}

gives me "temp" as the answer. I was expecting "randomvalue". Can I not
modify the environmental variables and create new ones in anon functions ?

But d.setVar("TEMPDIR", "randomvalue") in place of os.environ does the
mgic. Why can't we manipulate the environmental variable using os.environ ?

In bitbake.conf, we see that we can get env vars using os.getenv.

Thanks,
Nithyakala.
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