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This makes sure that Swift respects `-Xcc -stdlib=libc++` flags. Clang already has existing logic to discover the system-wide libc++ installation on Linux. We rely on that logic here. Importing a Swift module that was built with a different C++ stdlib is not supported and emits an error. The Cxx module can be imported when compiling with any C++ stdlib. The synthesized conformances, e.g. to CxxRandomAccessCollection also work. However, CxxStdlib currently cannot be imported when compiling with libc++, since on Linux it refers to symbols from libstdc++ which have different mangled names in libc++. rdar://118357548 / https://github.com/swiftlang/swift/issues/69825
35 lines
2.2 KiB
Swift
35 lines
2.2 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: split-file %s %t
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// Make sure we can build a Swift library with libc++ and then import it from a Swift executable.
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// RUN: %target-build-swift %t/library.swift -emit-module -emit-library -cxx-interoperability-mode=default -Xcc -stdlib=libc++ -module-name MyLibrary -emit-module-path %t/artifacts/MyLibrary.swiftmodule -I %S/Inputs
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// RUN: %target-build-swift %t/executable.swift -emit-executable -cxx-interoperability-mode=default -Xcc -stdlib=libc++ -module-name ImportsMyLibrary -I %t/artifacts -I %S/Inputs
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// RUN: %empty-directory(%t/artifacts)
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// Make sure Swift does not allow importing a library built with libc++ into an executable that uses libstdc++.
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// RUN: %target-build-swift %t/library.swift -emit-module -emit-library -cxx-interoperability-mode=default -Xcc -stdlib=libc++ -module-name MyLibrary -emit-module-path %t/artifacts/MyLibrary.swiftmodule -I %S/Inputs
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// RUN: not %target-build-swift %t/executable.swift -emit-executable -cxx-interoperability-mode=default -module-name ImportsMyLibrary -I %t/artifacts -I %S/Inputs 2>&1 | %FileCheck %s --check-prefix=CHECK-LIBCXX-DEPENDENCY
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// CHECK-LIBCXX-DEPENDENCY: error: module 'MyLibrary' was built with libc++, but current compilation uses libstdc++
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// RUN: %empty-directory(%t/artifacts)
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// Make sure Swift does not allow importing a library built with libstdc++ into an executable that uses libc++.
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// RUN: %target-build-swift %t/library.swift -emit-module -emit-library -cxx-interoperability-mode=default -module-name MyLibrary -emit-module-path %t/artifacts/MyLibrary.swiftmodule -I %S/Inputs
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// RUN: not %target-build-swift %t/executable.swift -emit-executable -cxx-interoperability-mode=default -Xcc -stdlib=libc++ -module-name ImportsMyLibrary -I %t/artifacts -I %S/Inputs 2>&1 | %FileCheck %s --check-prefix=CHECK-LIBSTDCXX-DEPENDENCY
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// CHECK-LIBSTDCXX-DEPENDENCY: error: module 'MyLibrary' was built with libstdc++, but current compilation uses libc++
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// REQUIRES: OS=linux-gnu
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// REQUIRES: system_wide_libcxx
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//--- library.swift
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import CxxStdlib
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import StdString
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public func getStdString() -> std.string { return std.string() }
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//--- executable.swift
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import MyLibrary
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print("")
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