Open Radar

 
Summary:
Building a project randomly fails if it refers to a module which exists for both iOS and OS X with the same name. Sometimes it would correctly build the iOS version and succeed. Sometimes it would incorrectly try to build the OS X version which fails because the OS X cannot be compiled with iOS headers.

I have tried different variants of "enabling modules", "defines module" and enabling framework auto-linking. As far as I can tell, the problem goes away if I disable "defines module" for the OS X framework, but that cannot be the solution.

As a developer I would expect for xcodebuild to always build the same dependent targets and not make non-deterministic/incorrect choices.

Steps to Reproduce:
1. Clone the DTRichTextEditor project from github

git clone --recursive https://github.com/Cocoanetics/DTRichTextEditor.git 

2. Change into the cloned folder

cd DTRichTextEditor

3. Build the demo app:

xcodebuild -project DTRichTextEditor.xcodeproj -scheme "Demo App" build -sdk iphonesimulator -arch x86_64 | grep "^=\|^*"

4. Repeat step 3 a couple of times

Expected Results:
- The build should always show ** BUILD SUCCEEDED **
- It should do that every time
- The output of step 3 should be:

=== BUILD TARGET Resource Bundle OF PROJECT DTLoupe WITH CONFIGURATION Debug ===
=== BUILD TARGET Static Library OF PROJECT DTLoupe WITH CONFIGURATION Debug ===
=== BUILD TARGET DTFoundation (iOS) OF PROJECT DTFoundation WITH CONFIGURATION Debug ===
=== BUILD TARGET Static Library OF PROJECT DTWebArchive WITH CONFIGURATION Debug ===
=== BUILD TARGET DTCoreText (iOS) OF PROJECT DTCoreText WITH CONFIGURATION Debug ===
=== BUILD TARGET DTRichTextEditor (iOS) OF PROJECT DTRichTextEditor WITH CONFIGURATION Debug ===
=== BUILD TARGET Demo App OF PROJECT DTRichTextEditor WITH CONFIGURATION Debug ===
** BUILD SUCCEEDED **

Actual Results:
- Some builds succeed, some builds fail
- when the build fails you can see in the output that "DTFoundation (OS X)" is included there
- when a build fails the output of step 3 is:

=== BUILD TARGET Resource Bundle OF PROJECT DTLoupe WITH CONFIGURATION Debug ===
=== BUILD TARGET Static Library OF PROJECT DTLoupe WITH CONFIGURATION Debug ===
=== BUILD TARGET DTFoundation (OSX) OF PROJECT DTFoundation WITH CONFIGURATION Debug ===
=== BUILD TARGET DTFoundation (iOS) OF PROJECT DTFoundation WITH CONFIGURATION Debug ===
=== BUILD TARGET Static Library OF PROJECT DTWebArchive WITH CONFIGURATION Debug ===
=== BUILD TARGET DTCoreText (iOS) OF PROJECT DTCoreText WITH CONFIGURATION Debug ===
** BUILD FAILED **

Version:
Xcode 6.4 (6E35b), OS X 10.10.5 (14F6a)

Notes:
Here's a Travis-CI build that worked, with an easier to read xctool log: https://travis-ci.org/Cocoanetics/DTRichTextEditor/builds/72820037

And here's a Travis-CI that didn't just before. See line 683 where it fails to build a category on NSDocument which of course couldn't be built for iOS:
https://travis-ci.org/Cocoanetics/DTRichTextEditor/builds/72819401