CODEWITHSUNDEEP
objective-cxcodeunit-testingobjective-c++
iKiR
iKiR

Reputation: 860

Unit test unresolved symbol when using Objective-C++

I am trying to create unit tests to my project, I have workspace with several projects with tens of static libraries and apps. So, I created a new project for static library in this workspace and added Cocoa Touch UnitTest bundle to it. Then I added a test for one of the functions in one of the libraries in this workspace, lets say library X, I also added link dependency to my unit test bundle to lib X. But when I run unit tests (Cmd + U). I get linker error:

Undefined symbols for architecture i386:"_OSVersion", referencedfrom:-[MyUnitTest testMethodFromLibX] in MyUnitTestTest.o "_methodFromLibX", referenced symbol(s) not found for architecture i386

Why test bundle is not linking with library X? I can see libX.a and MyUnitTests.octet in build folder.

Upvotes: 2

Views: 278

Answers (2)

iKiR
iKiR

Reputation: 860

Ok, thanks all, I found cause of the problem - my libX was Objective-C++ library, so linker mangled all names, but my Unit-Tests were Objective-C library, so when it was linking it obviously couldn't find method or class by name, since linkage was different. So, I convert unit-tests into Objective-C++ library(just changed *.m -> *.mm) and everything works!

Upvotes: 1

David Hoerl
David Hoerl

Reputation: 41642

Unit tests run in the simulator, and so every library need to have a x386 version. You can use the command line to examine each - i believe "file lib.a" does this but a quick google search will turn up the name.

Upvotes: 0

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