compilation warning: no rule to process file for architecture i386
Click on your project, and check that this file is not present in the tab Build Phases. Normally no header files should stay here. Clean and build it again, it should work!
Graphical guide for Xcode 4.x to remove this warning:
http://joytek.blogspot.tw/2011/09/xcode-4-warning-no-rule-to-process-file.html
We can resolve this issue by simply following the steps below:-Some .md, .mdown .h files are included in the Compile Sources
Step 1) Select Project Navigator
Step 2) Select your project
Step 3) Select your targetStep
Step 4) Select Build PhasesStep
Step 5) Move files which we don't want the compiler to process from Compile Sources to Copy Bundle Resources