Could not build Objective-C module 'CoreGraphics'

Question

I'm getting the following error when trying to run any of my unit or UI tests. Doesn't happen when running the application itself. The error message is shown below:

/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreGraphics.framework/Headers/CGBase.h:12:10: note: while building module 'CoreFoundation' imported from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreGraphics.framework/Headers/CGBase.h:12:
#include <CoreFoundation/CFBase.h>
     ^
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "Headers/CoreFoundation.h"
    ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:43:10: note: in file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CoreFoundation.h:43:
#include <CoreFoundation/CFBase.h>
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFBase.h:72:10: note: in file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreFoundation.framework/Headers/CFBase.h:72:
#include <Block.h>
     ^
/Users/eirik/Documents/Utvikling/iOS/ProsjekterSamarbeid/AnchorPoint Fishing as/FerskFiskiOS/Pods/leveldb-library/table/Block.h:10:10: note: in file included from /Users/eirik/Documents/Utvikling/iOS/ProsjekterSamarbeid/AnchorPoint Fishing as/FerskFiskiOS/Pods/leveldb-library/table/Block.h:10:
#include "leveldb/iterator.h"
     ^
/Users/eirik/Documents/Utvikling/iOS/ProsjekterSamarbeid/AnchorPoint Fishing as/FerskFiskiOS/Pods/leveldb-library/include/leveldb/iterator.h:18:10: note: in file included from /Users/eirik/Documents/Utvikling/iOS/ProsjekterSamarbeid/AnchorPoint Fishing as/FerskFiskiOS/Pods/leveldb-library/include/leveldb/iterator.h:18:
#include "leveldb/slice.h"

/Users/eirik/Documents/Utvikling/iOS/ProsjekterSamarbeid/AnchorPoint Fishing as/FerskFiskiOS/Pods/leveldb-library/include/leveldb/slice.h:21:10: error: 'string' file not found
#include <string>
     ^
<module-includes>:1:9: note: in file included from <module-includes>:1:
#import "Headers/CoreGraphics.h"
    ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreGraphics.framework/Headers/CoreGraphics.h:8:10: note: in file included from /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreGraphics.framework/Headers/CoreGraphics.h:8:
#include <CoreGraphics/CGBase.h>
     ^
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator11.0.sdk/System/Library/Frameworks/CoreGraphics.framework/Headers/CGBase.h:12:10: error: could not build module 'CoreFoundation'
#include <CoreFoundation/CFBase.h>
     ^
<unknown>:0: error: could not build Objective-C module 'CoreGraphics'

I'm using Xcode 9 in Swift 3.2 mode and CocoaPods. I'm using Firebase and FirebaseUI, which has leveldb as a dependency. You can see that the error is first triggered in leveldb/slice.h, which cannot find the string file.

I have tried the following up to this point:

• Clean (Shift + CMD + K)
• Remove DerivedData
• Clean Build Folder...
• Allow Non-Modular Includes In Framework Modules in Build Settings.
• pod deintegrate, pod clean pod install.

For what it's worth, here's the error in the Issue Navigator:

Any suggestions?

Answer 1

This looks similar to a CocoaPods issue that was fixed in CocoaPods 1.4.0. Search paths were not properly set for unit test targets.

Try updating to the CocoaPods 1.4.0 beta and rerun pod update

Or use a comparable workaround to the one described here for the leveldb path:

Add "${PODS_ROOT}/leveldb-library/include" to your Tests target only under Build Settings -> Header Search Paths