universal (real + simulator) compilation for iPhone
<p>I'm building a lib for iPhone SDK use using the SDK, and I use Makefiles, not xcode.</p>

<p>Consider this command line (or at least the beginning of a compile command line).</p>

<pre><code>/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/g++-4.2 -arch armv6 -pipe -no-cpp-precomp -isysroot /Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS4.0.sdk
</code></pre>

<p>I thought to add -arch i386 to the command line, but that doesn't work, since the iPhone platform does not include the simulator headers, and vica versa. I know that there's a means with lipo to combine them after the fact, but that doesn't fit very cleanly into my situation. Is there a mechanism I'm missing, other than manually creating a merged platform directory?</p>
