How to correctly build armv7 static library using xcodebuild

Question

I am trying to build a static library to target armv7.

I am using the following command in a bash script:

$XCODEBUILD -project 'MyLibrary.xcodeproj' -target "MyLibrary" -configuration 'Release' -sdk 'iphoneos7.0' clean build ARCHS='armv7 armv7s' IPHONEOS_DEPLOYMENT_TARGET='5.0' TARGET_BUILD_DIR='./build-arm' BUILT_PRODUCTS_DIR='./build-arm' 

I cannot link to the resulting lib. I get linker error:

file was built for archive which is not the architecture being linked (armv7s): ~/MyProject/MyProject/libMyLibrary.a

Is something wrong with the way I am building the binary?

Any help would be appreciated.

Update The target that I am trying to build (the application linking to the lib) has the following settings:

Answer 1

Check Build Settings (for the target you are trying to build!) - make sure that both Architectures and Valid Architectures are set to the same values.

Answer 2

Try setting ONLY_ACTIVE_ARCHS=NO in your command.

See this post as well