Swift cannot use -enable-experimental-cxx-interop on Linux with Foundation
#64457
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bug
A deviation from expected or documented behavior. Also: expected but undesirable behavior.
c++ interop
Feature: Interoperability with C++
c++ to swift
Feature → c++ interop: c++ to swift
compiler
The Swift compiler itself
Linux
Platform: Linux
swift 5.9
unexpected error
Bug: Unexpected error
Comments
jpsim
added
bug
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With |
AnthonyLatsis
added
Linux
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I'm also getting wild erorrs here. I don't want to flood this issue with another batch of erors, but apparently in my case I get a segfault when compiling for linux (and a humongouse error output, which I will share if asked for); and also get a quick fail on mac which I can share since it's fairly quick and small: Sure, it may look like it's an issue with swift-log, and it may be the case, but I only get this failure when I try to enable the experimental cxx interop. If this comment was merely a noise, please accept my apologies. |
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@adam-rocska This is great feedback. We will look into it. |
22 tasks
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CC @etcwilde |
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similar errors here with Swift nightly and <module-includes>:2:10: note: in file included from <module-includes>:2:
#include "CoreFoundation.h"
^
/usr/lib/swift/CoreFoundation/CoreFoundation.h:33:10: note: in file included from /usr/lib/swift/CoreFoundation/CoreFoundation.h:33:
#include <math.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/math.h:36:11: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/math.h:36:
# include <cmath>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/cmath:1927:12: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/cmath:1927:
# include <bits/specfun.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/specfun.h:45:10: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/specfun.h:45:
#include <bits/stl_algobase.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_algobase.h:64:10: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_algobase.h:64:
#include <bits/stl_pair.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_pair.h:59:10: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_pair.h:59:
#include <bits/move.h> // for std::move / std::forward, and std::swap
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/move.h:74:5: error: redefinition of 'forward'
forward(typename std::remove_reference<_Tp>::type& __t) noexcept
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/move.h:74:5: note: previous definition is here
forward(typename std::remove_reference<_Tp>::type& __t) noexcept
^
<module-includes>:2:10: note: in file included from <module-includes>:2:
#include "CoreFoundation.h"
^
/usr/lib/swift/CoreFoundation/CoreFoundation.h:33:10: note: in file included from /usr/lib/swift/CoreFoundation/CoreFoundation.h:33:
#include <math.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/math.h:36:11: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/math.h:36:
# include <cmath>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/cmath:1927:12: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/cmath:1927:
# include <bits/specfun.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/specfun.h:45:10: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/specfun.h:45:
#include <bits/stl_algobase.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_algobase.h:64:10: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_algobase.h:64:
#include <bits/stl_pair.h>
^
/usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_pair.h:59:10: note: in file included from /usr/bin/../lib/gcc/aarch64-linux-gnu/9/../../../../include/c++/9/bits/stl_pair.h:59:
#include <bits/move.h> // for std::move / std::forward, and std::swap |
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Similar errors here: If I remove |
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yeah it appears it's only breaking starting with C++17 and above. Investigating. |
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@adam-rocska fwiw, your issue has been fixed, we now provide (deprecated) default constructors again. |
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I have a potential fix. |
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Jul 28, 2023
Fixes swiftlang#64457 (cherry picked from commit c215abd)
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Thank you, will this make it into 5.9? |
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Description
Foundation can't be used on Linux when
-enable-experimental-cxx-interopis enabled.Steps to reproduce
import Foundationfrom a Swift file compiled with-enable-experimental-cxx-interopon Linux.Here's a full step-by-step repro case on macOS with Docker installed:
cd /path/to/unzipped/swift-cxx-interop-demoswift run -Xcc -std=c++17<- building and running on macOS worksdocker run -it -vpwd:pwd-wpwdswift:5.7.3 swift run -Xcc -std=c++17<- fails on Linux with the following errors:Expected behavior
Foundation should be usable on Linux when
-enable-experimental-cxx-interopis enabled.Environment
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