Just upgraded to Snow Leopard, installed Xcode 3.2, then installed iPhone SDK 3 for SL.
In a project, I now get the following error on build:
Add the following to ~/.profile (for Mac OS X 10.5):
export C_INCLUDE_PATH=/Developer/SDKs/MacOSX10.5.sdk/usr/include export LIBRARY_PATH=/Developer/SDKs/MacOSX10.5.sdk/usr/lib