Setting auto-indentation of braces

[Juha Nieminen]

  In the linux version of emacs, when I'm writing a C/C++/other 
{}-based language, when I write a { to start a new block, emacs 
automatically indents it.

  In the macosx version this autoindentation is off, and I can't figure 
out where to turn it on. I'm so accustomed to it, that it's annoying 
that it doesn't work...

  Which magic .emacs line turns this feature on?