[SR-3648] Unable to Import Foundation #46233
Comments
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Missing stddef.h implies that we couldn't find the Clang headers relative to Swift (they should be in lib/swift/clang/). @shahmishal, have we heard about this before? |
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Comment by Mason Mark (JIRA) I think this issue is related to, or possibly a duplicate of, SR-3794. On Ubuntu 10.4, I saw identical symptoms as described in this issue. But the workaround described on the other issue, of manually supplying the include path as a command-line argument when launching the swift REPL, made it work normally: BEFORE: REPL malfunctions when I try to import Foundation ubuntu@mason-linux-2017:~$ swift
Welcome to Swift version 3.1-dev (LLVM a7c680da51, Clang f186e73135, Swift 41ac6d6991). Type :help for assistance.
1> import Foundation
<module-includes>:1:10: note: in file included from <module-includes>:1:
#include "CoreFoundation.h"
^
error: /swift-3.1-DEVELOPMENT-SNAPSHOT-2017-02-11-a-ubuntu16.04/usr/lib/swift/CoreFoundation/CoreFoundation.h:26:10: error: 'stdarg.h' file not found
#include <stdarg.h>
^
/swift-3.1-DEVELOPMENT-SNAPSHOT-2017-02-11-a-ubuntu16.04/usr/lib/swift/CoreFoundation/CFStream.h:20:10: note: while building module 'CDispatch' imported from /swift-3.1-DEVELOPMENT-SNAPSHOT-2017-02-11-a-ubuntu16.04/usr/lib/swift/CoreFoundation/CFStream.h:20:
#include <dispatch/dispatch.h>
^
<module-includes>:1:10: note: in file included from <module-includes>:1:
#include "dispatch.h"
^
error: /swift-3.1-DEVELOPMENT-SNAPSHOT-2017-02-11-a-ubuntu16.04/usr/lib/swift/dispatch/dispatch.h:43:10: error: 'stddef.h' file not found
#include <stddef.h>
^
error: could not build Objective-C module 'CoreFoundation'
1> let foo = URL(string: "http://example.com")
Shared Swift state for repl_swift has developed fatal errors and is being discarded.
REPL definitions and persistent names/types will be lost.
error: repl.swift:1:11: error: use of unresolved identifier 'URL'
let foo = URL(string: "http://example.com")
^~~
1> AFTER: REPL works when I supply include path as command line argument when launching swift: ubuntu@mason-linux-2017:~$ swift -I/swift/usr/lib/swift/clang/include/
Welcome to Swift version 3.1-dev (LLVM a7c680da51, Clang f186e73135, Swift 41ac6d6991). Type :help for assistance.
1> import Foundation
2> let foo = URL(string: "http://example.com")
foo: Foundation.URL? = some {...}Note: path used may vary based on where swift is installed; on this machine latest swift snapshot is installed at |
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Comment by Mason Mark (JIRA) Same workaround fixes; may actually be duplicate. |
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Comment by Rick M (JIRA) This was affecting me on Ubuntu 16.04, importing anything ( |
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Comment by Mason Mark (JIRA) The workaround above works for the REPL case: swift -I/swift/usr/lib/swift/clang/include/However, the same basic issue is present when trying to debug a Swift executable on Linux using lldb. Inside lldb, the same crash is occurring when trying to print an object that uses Foundation. Is there any way to do the equivalent of Example: ubuntu@mason-linux-2017:~/Code/SORACOM/soracom-sdk-swift$ lldb .build/debug/LinuxDemoAppForSoracomSDK
(lldb) target create ".build/debug/LinuxDemoAppForSoracomSDK"
Current executable set to '.build/debug/LinuxDemoAppForSoracomSDK' (x86_64).
(lldb) b main.swift:7
Breakpoint 1: where = LinuxDemoAppForSoracomSDK`main + 987 at main.swift:7, address = 0x00000000004092eb
(lldb) run
Process 84968 launched: '/mnt/hgfs/Code/SORACOM/soracom-sdk-swift/.build/debug/LinuxDemoAppForSoracomSDK' (x86_64)
Hello, world!
Process 84968 stopped
* thread #​1, name = 'LinuxDemoAppFor', stop reason = breakpoint 1.1
frame #​0: 0x00000000004092eb LinuxDemoAppForSoracomSDK`main at main.swift:7
4 import SoracomSDKSwift
5
6 let req = SoracomSDKSwift.Request.auth()
-> 7 let res = req.wait()
8 print(res)
9
10 print("Goodbye, world!")
Target 0: (LinuxDemoAppForSoracomSDK) stopped.
(lldb) po req
error: in auto-import:
failed to get module 'LinuxDemoAppForSoracomSDK' from AST context:
<module-includes>:1:10: note: in file included from <module-includes>:1:
#include "dispatch.h"
^
/swift-4.0-DEVELOPMENT-SNAPSHOT-2017-07-06-a-ubuntu16.04/usr/lib/swift/dispatch/dispatch.h:30:10: note: in file included from /swift-4.0-DEVELOPMENT-SNAPSHOT-2017-07-06-a-ubuntu16.04/usr/lib/swift/dispatch/dispatch.h:30:
#include <os/linux_base.h>
^
/swift-4.0-DEVELOPMENT-SNAPSHOT-2017-07-06-a-ubuntu16.04/usr/lib/swift/os/linux_base.h:16:10: note: in file included from /swift-4.0-DEVELOPMENT-SNAPSHOT-2017-07-06-a-ubuntu16.04/usr/lib/swift/os/linux_base.h:16:
#include <sys/param.h>
^
error: /usr/include/x86_64-linux-gnu/sys/param.h:23:10: error: 'stddef.h' file not found
#include <stddef.h>
^
error: could not build C module 'CDispatch'
(lldb) NOTE: Original bug was from Swift 3 time frame. I am still seeing it with |
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Comment by Matthias M. Schneider (JIRA) Please see the comment on issue SR-5524 for a possible temporary fix. |
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Comment by Mason Mark (JIRA) MatiMax (JIRA User) Awesome, thank you! That workaround indeed gets lldb working as well. To recap: setting the Example: $ export C_INCLUDE_PATH=/swift/usr/lib/swift/clang/include/
$ export CPLUS_INCLUDE_PATH=$C_INCLUDE_PATH
$
$
$ swift
Welcome to Swift version 4.0-dev (LLVM a15decabe3, Clang 14ff3d9712, Swift d574ed67d6). Type :help for assistance.
1> import Foundation
2> let status = "woohoo! 'import Foundation' works on Linux"
status: String = "woohoo! \'import Foundation\' works on Linux"
3> ^C
3> ^D
$
$
$
$ lldb ./.build/debug/LinuxDemoAppForSoracomSDK
(lldb) target create "./.build/debug/LinuxDemoAppForSoracomSDK"
Current executable set to './.build/debug/LinuxDemoAppForSoracomSDK' (x86_64).
(lldb) b main.swift:54
Breakpoint 1: where = LinuxDemoAppForSoracomSDK`main + 886 at main.swift:54, address = 0x0000000000409ed6
(lldb) run
Process 2405 launched: './.build/debug/LinuxDemoAppForSoracomSDK' (x86_64)
Hello, world!
Process 2405 stopped
* thread #​1, name = 'LinuxDemoAppFor', stop reason = breakpoint 1.1
frame #​0: 0x0000000000409ed6 LinuxDemoAppForSoracomSDK`main at main.swift:54
51
52 var creds = SoracomSDKSwift.SoracomCredentials.defaultSavedCredentials()
53
-> 54 if creds.blank {
55
56 print("No stored credentials found.")
57 print("Creating initial credentials...")
Target 1: (LinuxDemoAppForSoracomSDK) stopped.
(lldb) po creds
▿ SoracomCredentials
- type : SoracomSDKSwift.SoracomCredentialType.RootAccount
- emailAddress : "ubuttnu@example.com"
- operatorID : ""
- username : ""
- password : "Ubuttnu123$!"
- authKeyID : ""
- authKeySecret : "secret-BeMoTtlusnInAsIsdriBfOmodeerFehTtSFhJJ"
- apiKey : ""
- token : ""
(lldb) ^C
(lldb) ^D
$ |
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Comment by Dave Carlton (JIRA) Just encountered this on Debian 9.0. The workaround was swift -I/usr/lib/swift/clang/include/ |
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Comment by Christos Vontas (JIRA) Encountered this on Ubuntu16.10 in a Docker container running as a different than root user. `chmod o+rw -R /usr/lib/swift/CoreFoundation/` did the trick for me. |
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Comment by Ron Olson (JIRA) This happens with Swift 4.0.2 on Linux running natively (i.e. not in a container), (Ubuntu as well as compiled from source with Fedora) as well; the workaround to pass the clang headers from the swift installation does work. |
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Any update on this? |
Environment
Ubuntu 16.10 Swift version 3.1-dev (LLVM 7e421db87c, Clang 4a0ed6aa35, Swift 5a24741)
Additional Detail from JIRA
md5: b658a942de2da11f0d869a04c5e065be
is duplicated by:
relates to:
Issue Description:
I am unable to use Foundation as it sparks an error when trying to find its own files.
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