pkg/60410: mail/thunderbird: Unknown compiler "cc"; available options: clang emcc gcc icc msvc sunstudio xcode xlc

Hey
Congrats to 11.0! Sorry to spam this to a few mailinglists. netbsd-user 
and pkgsrc-user, but found this,
and not sure if this will be applied to the mailinglist as a reply or if 
it will be a standalone mail.
But this will get you further building mail/thunderbird
If the environment variable CC is set, then use that, otherwise find the 
path to the binary cc and use that instead.
Ran into some problem with the c++  wrapper later, but i think it might 
be related to me not building
much/at all with pkgsrc.

patches/patch-comm_third__party_openpgp.configure
-                "--cc={}".format(os.getenv("CC"))
+                "--cc={}".format(if os.getenv("CC") else import shutil; 
shutil.which("cc")),

br Nicklas