[omochi@omochi-iMac-PC43 SwiftyMath (master=)]$ swift build Compile Swift Module 'SwiftyMath' (70 sources) Compile Swift Module 'SwiftyLieGroups' (12 sources) Compile Swift Module 'SwiftyHomology' (10 sources) Compile Swift Module 'SwiftyKnots' (9 sources) Compile Swift Module 'SwiftyTopology' (15 sources) Linking ./.build/x86_64-apple-macosx10.10/debug/libdSwiftyMath.dylib Compile Swift Module 'Sample' (1 sources) Linking ./.build/x86_64-apple-macosx10.10/debug/Sample [omochi@omochi-iMac-PC43 SwiftyMath (master=)]$ swift --version Apple Swift version 4.1.2 (swiftlang-902.0.54 clang-902.0.39.2) Target: x86_64-apple-darwin17.6.0