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egorzhdan opened this issue Oct 3, 2022 · 0 comments · Fixed by #66557
Closed

Linker error when using std::map default constructor from Swift on Linux #61412

egorzhdan opened this issue Oct 3, 2022 · 0 comments · Fixed by #66557
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. c++ interop Feature: Interoperability with C++

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@egorzhdan
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See swift/test/Interop/Cxx/stdlib/use-std-map.swift.

using Map = std::map<int, int>;
let m = Map()
******************** TEST 'Swift(linux-x86_64) :: Interop/Cxx/stdlib/use-std-map.swift' FAILED ********************
Script:
--
: 'RUN: at line 1';   rm -rf "/home/build-user/build/buildbot_linux/swift-linux-x86_64/test-linux-x86_64/Interop/Cxx/stdlib/Output/use-std-map.swift.tmp" && mkdir -p "/home/build-user/build/buildbot_linux/swift-linux-x86_64/test-linux-x86_64/Interop/Cxx/stdlib/Output/use-std-map.swift.tmp" && /home/build-user/build/buildbot_linux/swift-linux-x86_64/bin/swiftc -target x86_64-unknown-linux-gnu -toolchain-stdlib-rpath  -module-cache-path /home/build-user/build/buildbot_linux/swift-linux-x86_64/swift-test-results/x86_64-unknown-linux-gnu/clang-module-cache -swift-version 4  -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -Xfrontend -define-availability -Xfrontend 'SwiftStdlib 5.8:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999'  -module-cache-path /home/build-user/build/buildbot_linux/swift-linux-x86_64/swift-test-results/x86_64-unknown-linux-gnu/clang-module-cache /home/build-user/swift/test/Interop/Cxx/stdlib/use-std-map.swift -I /home/build-user/swift/test/Interop/Cxx/stdlib/Inputs -Xfrontend -enable-experimental-cxx-interop -o /home/build-user/build/buildbot_linux/swift-linux-x86_64/test-linux-x86_64/Interop/Cxx/stdlib/Output/use-std-map.swift.tmp/a.out -module-name main  && echo /home/build-user/build/buildbot_linux/swift-linux-x86_64/test-linux-x86_64/Interop/Cxx/stdlib/Output/use-std-map.swift.tmp/a.out && /usr/bin/env LD_LIBRARY_PATH='/home/build-user/build/buildbot_linux/swift-linux-x86_64/lib/swift/linux'  /home/build-user/build/buildbot_linux/swift-linux-x86_64/test-linux-x86_64/Interop/Cxx/stdlib/Output/use-std-map.swift.tmp/a.out
--
Exit Code: 1

Command Output (stderr):
--
/tmp/lit-tmp-3vjnhydr/use-std-map-2481b4.o:use-std-map-2481b4.o:function $s4mainyycfU_: error: undefined reference to 'std::map<int, int, std::less<int>, std::allocator<std::pair<int const, int> > >::map()'
clang-13: error: linker command failed with exit code 1 (use -v to see invocation)
<unknown>:0: error: link command failed with exit code 1 (use -v to see invocation)
@egorzhdan egorzhdan added bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. c++ interop Feature: Interoperability with C++ labels Oct 3, 2022
@egorzhdan egorzhdan mentioned this issue Oct 3, 2022
Merged
egorzhdan added a commit that referenced this issue Jun 12, 2023
@egorzhdan
[cxx-interop] Avoid linker errors when calling a defaulted constructor
7ca1163 
When a default constructor is declared, but does not have a body because it is defaulted (`= default;`), Swift did not emit the IR for it. This was causing linker error for types such as `std::map` in libstdc++ when someone tried to initialize such types from Swift.

rdar://110638499 / resolves #61412
@egorzhdan egorzhdan mentioned this issue Jun 12, 2023
Merged
egorzhdan added a commit that referenced this issue Jun 12, 2023
@egorzhdan
[cxx-interop] Avoid linker errors when calling a defaulted constructor
b459fb5 
When a default constructor is declared, but does not have a body because it is defaulted (`= default;`), Swift did not emit the IR for it. This was causing linker error for types such as `std::map` in libstdc++ when someone tried to initialize such types from Swift.

rdar://110638499 / resolves #61412
egorzhdan added a commit that referenced this issue Jun 13, 2023
@egorzhdan
[cxx-interop] Avoid linker errors when calling a defaulted constructor
f2618b9 
When a default constructor is declared, but does not have a body because it is defaulted (`= default;`), Swift did not emit the IR for it. This was causing linker error for types such as `std::map` in libstdc++ when someone tried to initialize such types from Swift.

rdar://110638499 / resolves #61412
(cherry picked from commit b459fb5)
@egorzhdan egorzhdan mentioned this issue Jun 13, 2023
Merged
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. c++ interop Feature: Interoperability with C++
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[cxx-interop] Avoid linker errors when calling a defaulted constructor swiftlang/swift
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