XCode 4.3 - Build error "missing required architecture armv7"

Question

After upgrade XCode from 4.2 to 4.3 I've got below problem. I can't build it. Do you guys have idea how can I resolve this problem? even some clue would be helpful to me.

ld: warning: ignoring file    /Applications/Xcode.app/Contents/Developer/Library/Frameworks/SenTestingKit.framework/SenTestingKit, missing required architecture armv7 in file
Undefined symbols for architecture armv7:
  "_STComposeString", referenced from:
      -[NSMutableURLRequest_ParametersTest verifyDefaultParametersForRequest:] in NSMutableURLRequest+ParametersTest.o
      -[NSMutableURLRequest_ParametersTest verifyModifiedParametersForRequest:] in NSMutableURLRequest+ParametersTest.o
      -[NSMutableURLRequest_ParametersTest verifyEmptyParametersForRequest:] in NSMutableURLRequest+ParametersTest.o
      -[NSString_URLEncodingTest testURLEncodedString] in NSString+URLEncodingTest.o
      -[NSURL_BaseTest testURLStringWithoutQuery] in NSURL+BaseTest.o
      -[OAHMAC_SHA1SignatureProviderTest testSignClearText] in OAHMAC_SHA1SignatureProviderTest.o
      -[OAMutableURLRequestTest testGenerateNonce] in OAMutableURLRequestTest.o
      ...
  "_OBJC_CLASS_$_SenTestCase", referenced from:
      _OBJC_CLASS_$_NSMutableURLRequest_ParametersTest in NSMutableURLRequest+ParametersTest.o
      _OBJC_CLASS_$_NSString_URLEncodingTest in NSString+URLEncodingTest.o
      _OBJC_CLASS_$_NSURL_BaseTest in NSURL+BaseTest.o
      _OBJC_CLASS_$_OAHMAC_SHA1SignatureProviderTest in OAHMAC_SHA1SignatureProviderTest.o
      _OBJC_CLASS_$_OAMutableURLRequestTest in OAMutableURLRequestTest.o
      _OBJC_CLASS_$_OAPlaintextSignatureProviderTest in OAPlaintextSignatureProviderTest.o
      _OBJC_CLASS_$_OARequestParameterTest in OARequestParameterTest.o
      ...
  "_OBJC_METACLASS_$_SenTestCase", referenced from:
      _OBJC_METACLASS_$_NSMutableURLRequest_ParametersTest in NSMutableURLRequest+ParametersTest.o
      _OBJC_METACLASS_$_NSString_URLEncodingTest in NSString+URLEncodingTest.o
      _OBJC_METACLASS_$_NSURL_BaseTest in NSURL+BaseTest.o
      _OBJC_METACLASS_$_OAHMAC_SHA1SignatureProviderTest in OAHMAC_SHA1SignatureProviderTest.o
      _OBJC_METACLASS_$_OAMutableURLRequestTest in OAMutableURLRequestTest.o
      _OBJC_METACLASS_$_OAPlaintextSignatureProviderTest in OAPlaintextSignatureProviderTest.o
      _OBJC_METACLASS_$_OARequestParameterTest in OARequestParameterTest.o
      ...
ld: symbol(s) not found for architecture armv7
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Answer 1

I was getting the same linking error for the Simulator after upgrading from Xcode 4.2 -> 4.3.1. I noticed that new projects in 4.3.1 do work with Unit Tests, so just compared the project differences.

What fixed it for me was:-

1. Select Project in project navigator
2. Select Test Target
3. Select Build Settings
4. Go down to Framework Search Paths and single-click it
5. Delete whatever is there
6. Enter $(SDKROOT)/Developer/Library/Frameworks $(DEVELOPER_LIBRARY_DIR)/Frameworks
7. If you had any custom frameworks, add those back

Actually, Unit Tests run fine on the Device, too.