Create an empty project

$ xmake create -l swift -t console test

xmake.lua

add_rules("mode.debug", "mode.release")

target("test")
    set_kind("binary")
    add_files("src/*.swift")

Swift Interop with C++/Objective-C

Starting from v3.0.5, xmake supports Swift interop with C++/Objective-C. When the swift.interop target value is set, the swift.interop rule is automatically enabled, making it easy to mix Swift and C++ code in the same project.

Configure Swift Interop

You can configure Swift interop using the following target values:

target("cxx_interop")
    set_kind("binary")
    set_languages("cxx20")
    add_files("lib/**.swift", {public = true})
    add_files("src/**.cpp")
    set_values("swift.modulename", "SwiftFibonacci")           -- Set the Swift module name
    set_values("swift.interop", "cxx")                         -- Enable interop: "objc" or "cxx"
    set_values("swift.interop.headername", "fibonacci-Swift.h") -- Define output header name
    set_values("swift.interop.cxxmain", true)                  -- Force -parse-as-library to avoid duplicate main symbols

Interop Modes

• "objc": Objective-C interop mode
• "cxx": C++ interop mode

When swift.interop is set, xmake automatically generates the C++ header file that allows C++ code to call Swift functions. You can use swift.modulename to define the Swift module name, which becomes the namespace in C++. When both Swift and C++ have main functions, use swift.interop.cxxmain to avoid duplicate main symbols.

For more examples, see: Swift Examples