Xcode Won't Compile To Simulator

Question

I've just updated Xcode 4.5 via the App Store, from my previous version which I got from my Apple Developer Account. Since the update I can't compile any apps into the Simulator. I can compile onto a device, e.g. my iPhone.

The error I recieve is

    fatal error: file 
    '/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/
Developer/SDKs/iPhoneSimulator6.0.sdk/usr/include/Availability.h'
         has been modified since the precompiled header was built

1 error generated.

go in ~/Library/Developer/Xcode/DerivedData/{project name + gobly-gook} and delete folder with your project name — CRDave, Sep 21 '12 at 05:46
Having this same issue, with another file. Neither cleaning nor deleting the `derived data` has helped: http://stackoverflow.com/questions/13388647/xcode-4-5-2-fatal-error-precompiled-header-has-been-modified — Nic Foster, Nov 14 '12 at 22:59
There is another safe way mentioned here: http://stackoverflow.com/a/7072227/437146 — NightFury, Oct 03 '13 at 07:50

CRDave · Accepted Answer · 2013-01-17T06:33:24.017

23

go in ~/Library/Developer/Xcode/DerivedData/{project name + gobly-gook} and delete folder with your project name.

EDIT After suggestion

NOTE:

By default Library Folder is hidden so we can't see it.
So we have three way to use this hidden ~/Library folder

1.Unhide Library folder by following command to unhide ~/Library folder

chflags nohidden ~/Library

Now you can see Library folder as /Users//Library

2. Open GO menu of finder and press Alt key and Library will be visible as new menu item.
Select that to open Library folder

3. You can access ~/Library folder by Terminal.

edited Jan 17 '13 at 06:33

answered Sep 21 '12 at 05:54

CRDave

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Note that the ~/Library folder is hidden by default. You will have do this via terminal or show hidden files in Finder. – pinkeerach Jan 15 '13 at 19:50
1

yap thanks pinkeerach. one other short cut is open Go menu and press Alt. Library will be display as menu item. – CRDave Jan 16 '13 at 07:24
I have `chflags nohidden ~/Library` in my zsh profile. The Library gets hidden every time OS X updates, so this ensures it is always unhidden. – Zev Eisenberg Jul 15 '13 at 14:39

score 8 · Answer 2 · edited Sep 27 '12 at 09:35

8

There's easiest way: Just "clean" project (Product > Clean)

edited Sep 27 '12 at 09:35

Florent

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answered Sep 27 '12 at 08:00

Yaroslav Fedorov

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This works for me when I update to xcode4.6.3. Just try this before you go for the above answer. – Augustine Jun 18 '13 at 09:33

score 1 · Answer 3 · answered Jul 15 '13 at 13:10

1

You can just open the Organizer (top-right corner of XCode), go to the Projects tab, select your project on the left and then delete the Derived Data.

answered Jul 15 '13 at 13:10

amfcosta

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score 0 · Answer 4 · answered Dec 02 '14 at 09:33

0

This happened when I updated Xcode from 6.0.1 to 6.1

I cleaned the project and could compile successfully!!

answered Dec 02 '14 at 09:33

thatzprem

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Xcode Won't Compile To Simulator

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