Xcode Preprocessor Output

objective-c xcode c-preprocessor pch
MacMark picture MacMark · May 9, 2011 · Viewed 13.3k times · Source

I want to check the output of the preprocessor for some files. How can I view the preprocessor's output in Xcode?

Answer

Steven Hepting picture Steven Hepting · Jul 1, 2011

You can choose the "Show the Assistant editor" view in the top right set of buttons in the toolbar.

enter image description here

Then, at the top of the right-hand editor you can click the little Related Files button and then either choose Preprocess or Assembly.

enter image description here

You can see an example of both the preprocessor output and generated assembly code all side-by-side here:

enter image description here

Related questions

How to define a preprocessor symbol in Xcode

Is it possible to set a symbol for conditional compilation by setting up properties in an Xcode project? My aim is to to create a symbol that is available to all files, without having to use import/include, so that …

Read More
How to disable NSLog all over the app?

I want to disable NSLog() across all instances in an app. I found some code that does that: #ifndef DEBUG #define NSLog // #endif But adding this code to each file isn't good idea. How can I make it easier?

Read More
Invalid preprocessing directive for #elseifdef in Xcode

Why: #ifdef SOME_TARGET_FLAG <some code here> #elseifdef SOME_ANOTHER_TARGET_FLAG <some another code here> #endif produces "Invalid preprocessing directive" preprocess compilation error? SOME_TARGET_FLAG and SOME_ANOTHER_TARGET_FLAG are just some "…

Read More