Unsolvable Linkage error with openears when trying to run tests

Question

I have been using openears for a while now with no problems. I imported the library into my project and the application compiles and runs.
The problem arose when I tried to create and run tests. The projects refuses to compile and issues the following linkage error:

Undefined symbols for architecture x86_64:
"_delete_voice", referenced from:
_unregister_cmu_us_slt in OpenEars(cmu_us_slt.o)
"_flite_feat_set_string", referenced from:
_register_cmu_us_slt in OpenEars(cmu_us_slt.o)
"_cg_synth", referenced from:
_register_cmu_us_slt in OpenEars(cmu_us_slt.o)
"_uttfunc_val", referenced from:
_register_cmu_us_slt in OpenEars(cmu_us_slt.o)
"_flite_feat_set", referenced from:
_register_cmu_us_slt in OpenEars(cmu_us_slt.o)
"_OBJC_CLASS_$_OENotification", referenced from:
objc-class-ref in RapidEars(OEContinuousModel+RapidEars.o)
"_ps_nbest", referenced from:
l015 in RapidEars(OEContinuousModel+RapidEars.o)
"_cg_db_val", referenced from:
_register_cmu_us_slt in OpenEars(cmu_us_slt.o)
.
.
.
"_OBJC_CLASS_$_OEPocketsphinxController", referenced from:
type metadata accessor for __ObjC.OEPocketsphinxController in OpenEarsClient.o
l031 in RapidEars(OEPocketsphinxController+RapidEars.o)
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

I have tried several approaches I found but still haven't found a solution. Any help will be greatly appreciated.

Answer 1

Ok, managed to figure it out. Downloaded the latest Openears library and added it as before and it worked.
Apparently, You have to upgrade for it to work on Xcode 8.