Importing Foundation or Glibc in REPL on Ubuntu 16.10 failing

Peter_Ronnquist · January 28, 2017, 9:22pm

I have the same problem with importing Glibc into the REPL with "Swift
3.1 Development", Ubuntu 16.10, Jan 22, 2017, that was reported on the
snapshot from 15 December (see below).

Is this working for anyone?

Best Regards
Peter Ronnquist

···

On Monday 19 December Chris Double wrote:

Using the Ubuntu 16.10 snapshot from 15 December (or a build from
master) I can't seem to get "import Foundation" or "import Glibc"
working in the REPL. Here's an example:

-----------------8<------------------
$ swift
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
^

error: could not build Objective-C module 'SwiftGlibc'
-----------------8<------------------

This works fine if I use 'swiftc' and compile a file:

$ cat x.swift
import Glibc

print(random())

$ swiftc x.swift
$ ./x
...
-----------------8<------------------

If I explicitly pass include paths to 'swift' it works in the REPL:

-----------------8<------------------
$ swift -I/home/user/swift-install/usr/lib/swift/clang/include/
-I/home/user/swift-install/usr/include/lldb/Symbol/
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
2> random()
$R0: Int = 1804289383
-----------------8<------------------

Is there some setting or installation setup step I'm missing?

--
http://bluishcoder.co.nz

Michael_Gottesman · January 30, 2017, 8:00pm

Hmm... this sounds like this may be a good integration test. I am not sure what is going on here though. If I have a moment I will take a look a bit later today.

Michael

···

On Jan 28, 2017, at 1:22 PM, Peter Ronnquist via swift-users <swift-users@swift.org> wrote:

I have the same problem with importing Glibc into the REPL with "Swift
3.1 Development", Ubuntu 16.10, Jan 22, 2017, that was reported on the
snapshot from 15 December (see below).

Is this working for anyone?

Best Regards
Peter Ronnquist

On Monday 19 December Chris Double wrote:

Using the Ubuntu 16.10 snapshot from 15 December (or a build from
master) I can't seem to get "import Foundation" or "import Glibc"
working in the REPL. Here's an example:

-----------------8<------------------
$ swift
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
        ^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
        ^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
        ^

error: could not build Objective-C module 'SwiftGlibc'
-----------------8<------------------

This works fine if I use 'swiftc' and compile a file:

$ cat x.swift
import Glibc

print(random())

$ swiftc x.swift
$ ./x
...
-----------------8<------------------

If I explicitly pass include paths to 'swift' it works in the REPL:

-----------------8<------------------
$ swift -I/home/user/swift-install/usr/lib/swift/clang/include/
-I/home/user/swift-install/usr/include/lldb/Symbol/
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
2> random()
$R0: Int = 1804289383
-----------------8<------------------

Is there some setting or installation setup step I'm missing?

--
http://bluishcoder.co.nz
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https://lists.swift.org/mailman/listinfo/swift-users

Michael_Gottesman · January 30, 2017, 8:04pm

Interesting... it looks like we /do/ have an integration test that imports glibc into the repl:

github.com

apple/swift-integration-tests/blob/main/repl/test-repl-glibc.py

# Tests that importing Glibc works on Linux
#
# REQUIRES: platform=Linux
# REQUIRES: have-pexpect
# REQUIRES: rdar83892173
# RUN: rm -rf %t.dir
# RUN: mkdir %t.dir
# RUN: %{python} %s %{swift} > %t.dir/output.txt
# RUN: %{FileCheck} --input-file %t.dir/output.txt %s
# CHECK: OK

from __future__ import print_function

import pexpect, sys

swift = "swift"
if len(sys.argv) > 1:
    swift = sys.argv[1]
    
repl = pexpect.spawn(swift)

This file has been truncated. show original

Probably could use one that imports Foundation though.

Michael

···

On Jan 30, 2017, at 12:00 PM, Michael Gottesman <mgottesman@apple.com> wrote:

Hmm... this sounds like this may be a good integration test. I am not sure what is going on here though. If I have a moment I will take a look a bit later today.

Michael

On Jan 28, 2017, at 1:22 PM, Peter Ronnquist via swift-users <swift-users@swift.org> wrote:

I have the same problem with importing Glibc into the REPL with "Swift
3.1 Development", Ubuntu 16.10, Jan 22, 2017, that was reported on the
snapshot from 15 December (see below).

Is this working for anyone?

Best Regards
Peter Ronnquist

On Monday 19 December Chris Double wrote:

Using the Ubuntu 16.10 snapshot from 15 December (or a build from
master) I can't seem to get "import Foundation" or "import Glibc"
working in the REPL. Here's an example:

-----------------8<------------------
$ swift
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
       ^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
       ^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
       ^

error: could not build Objective-C module 'SwiftGlibc'
-----------------8<------------------

This works fine if I use 'swiftc' and compile a file:

$ cat x.swift
import Glibc

print(random())

$ swiftc x.swift
$ ./x
...
-----------------8<------------------

If I explicitly pass include paths to 'swift' it works in the REPL:

-----------------8<------------------
$ swift -I/home/user/swift-install/usr/lib/swift/clang/include/
-I/home/user/swift-install/usr/include/lldb/Symbol/
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
2> random()
$R0: Int = 1804289383
-----------------8<------------------

Is there some setting or installation setup step I'm missing?

--
http://bluishcoder.co.nz
_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users

Michael_Gottesman · January 30, 2017, 8:15pm

Peter, what are you doing specifically. I.e. are you passing any arguments to swift or something like that? Can you give a full reproducer?

Also can you type swift -v to confirm the version #?

Michael

···

On Jan 30, 2017, at 12:04 PM, Michael Gottesman via swift-users <swift-users@swift.org> wrote:

Interesting... it looks like we /do/ have an integration test that imports glibc into the repl:

https://github.com/apple/swift-integration-tests/blob/master/repl/test-repl-glibc.py

Probably could use one that imports Foundation though.

Michael

On Jan 30, 2017, at 12:00 PM, Michael Gottesman <mgottesman@apple.com <mailto:mgottesman@apple.com>> wrote:

Hmm... this sounds like this may be a good integration test. I am not sure what is going on here though. If I have a moment I will take a look a bit later today.

Michael

On Jan 28, 2017, at 1:22 PM, Peter Ronnquist via swift-users <swift-users@swift.org <mailto:swift-users@swift.org>> wrote:

I have the same problem with importing Glibc into the REPL with "Swift
3.1 Development", Ubuntu 16.10, Jan 22, 2017, that was reported on the
snapshot from 15 December (see below).

Is this working for anyone?

Best Regards
Peter Ronnquist

On Monday 19 December Chris Double wrote:

Using the Ubuntu 16.10 snapshot from 15 December (or a build from
master) I can't seem to get "import Foundation" or "import Glibc"
working in the REPL. Here's an example:

-----------------8<------------------
$ swift
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
       ^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
       ^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
       ^

error: could not build Objective-C module 'SwiftGlibc'
-----------------8<------------------

This works fine if I use 'swiftc' and compile a file:

$ cat x.swift
import Glibc

print(random())

$ swiftc x.swift
$ ./x
...
-----------------8<------------------

If I explicitly pass include paths to 'swift' it works in the REPL:

-----------------8<------------------
$ swift -I/home/user/swift-install/usr/lib/swift/clang/include/
-I/home/user/swift-install/usr/include/lldb/Symbol/
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
2> random()
$R0: Int = 1804289383
-----------------8<------------------

Is there some setting or installation setup step I'm missing?

--
http://bluishcoder.co.nz <http://bluishcoder.co.nz/>
_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users

_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users

mishal_shah · January 30, 2017, 9:07pm

Hi Peter,

Can you please file a bug (bugs.swift.org)? I am also seeing same error.

Thanks,
Mishal Shah

···

On Jan 30, 2017, at 12:15 PM, Michael Gottesman via swift-users <swift-users@swift.org> wrote:

Peter, what are you doing specifically. I.e. are you passing any arguments to swift or something like that? Can you give a full reproducer?

Also can you type swift -v to confirm the version #?

Michael

On Jan 30, 2017, at 12:04 PM, Michael Gottesman via swift-users <swift-users@swift.org <mailto:swift-users@swift.org>> wrote:

Interesting... it looks like we /do/ have an integration test that imports glibc into the repl:

https://github.com/apple/swift-integration-tests/blob/master/repl/test-repl-glibc.py

Probably could use one that imports Foundation though.

Michael

On Jan 30, 2017, at 12:00 PM, Michael Gottesman <mgottesman@apple.com <mailto:mgottesman@apple.com>> wrote:

Hmm... this sounds like this may be a good integration test. I am not sure what is going on here though. If I have a moment I will take a look a bit later today.

Michael

On Jan 28, 2017, at 1:22 PM, Peter Ronnquist via swift-users <swift-users@swift.org <mailto:swift-users@swift.org>> wrote:

I have the same problem with importing Glibc into the REPL with "Swift
3.1 Development", Ubuntu 16.10, Jan 22, 2017, that was reported on the
snapshot from 15 December (see below).

Is this working for anyone?

Best Regards
Peter Ronnquist

On Monday 19 December Chris Double wrote:

Using the Ubuntu 16.10 snapshot from 15 December (or a build from
master) I can't seem to get "import Foundation" or "import Glibc"
working in the REPL. Here's an example:

-----------------8<------------------
$ swift
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
       ^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
       ^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
       ^

error: could not build Objective-C module 'SwiftGlibc'
-----------------8<------------------

This works fine if I use 'swiftc' and compile a file:

$ cat x.swift
import Glibc

print(random())

$ swiftc x.swift
$ ./x
...
-----------------8<------------------

If I explicitly pass include paths to 'swift' it works in the REPL:

-----------------8<------------------
$ swift -I/home/user/swift-install/usr/lib/swift/clang/include/
-I/home/user/swift-install/usr/include/lldb/Symbol/
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
2> random()
$R0: Int = 1804289383
-----------------8<------------------

Is there some setting or installation setup step I'm missing?

--
http://bluishcoder.co.nz <http://bluishcoder.co.nz/>
_______________________________________________
swift-users mailing list
swift-users@swift.org <mailto:swift-users@swift.org>
https://lists.swift.org/mailman/listinfo/swift-users

_______________________________________________
swift-users mailing list
swift-users@swift.org <mailto:swift-users@swift.org>
https://lists.swift.org/mailman/listinfo/swift-users

_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users

Peter_Ronnquist · January 30, 2017, 9:17pm

Michael, I did the following to get the error:

···

----------------------------------------------------------
peter@peter-UX305CA:~/Documents/dev/swift/measurement$ swift -v
Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad, Swift ca7046e4a3)
Target: x86_64-unknown-linux-gnu
/home/peter/Documents/programs/swift/swift-DEVELOPMENT-SNAPSHOT-2017-01-04-a-ubuntu16.10/usr/bin/lldb
"--repl=-disable-objc-interop -color-diagnostics"
Welcome to Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad,
Swift ca7046e4a3). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
^

error: could not build Objective-C module 'SwiftGlibc'

1>
----------------------------------------------------------

Mishal, I'll file a bug.

Thank you all for your assistance.

On Mon, Jan 30, 2017 at 10:07 PM, mishal_shah <mishal_shah@apple.com> wrote:

Hi Peter,

Can you please file a bug (bugs.swift.org)? I am also seeing same error.

Thanks,
Mishal Shah

On Jan 30, 2017, at 12:15 PM, Michael Gottesman via swift-users > <swift-users@swift.org> wrote:

Peter, what are you doing specifically. I.e. are you passing any arguments
to swift or something like that? Can you give a full reproducer?

Also can you type swift -v to confirm the version #?

Michael

On Jan 30, 2017, at 12:04 PM, Michael Gottesman via swift-users > <swift-users@swift.org> wrote:

Interesting... it looks like we /do/ have an integration test that imports
glibc into the repl:

https://github.com/apple/swift-integration-tests/blob/master/repl/test-repl-glibc.py

Probably could use one that imports Foundation though.

Michael

On Jan 30, 2017, at 12:00 PM, Michael Gottesman <mgottesman@apple.com> > wrote:

Hmm... this sounds like this may be a good integration test. I am not sure
what is going on here though. If I have a moment I will take a look a bit
later today.

Michael

On Jan 28, 2017, at 1:22 PM, Peter Ronnquist via swift-users > <swift-users@swift.org> wrote:

I have the same problem with importing Glibc into the REPL with "Swift
3.1 Development", Ubuntu 16.10, Jan 22, 2017, that was reported on the
snapshot from 15 December (see below).

Is this working for anyone?

Best Regards
Peter Ronnquist

On Monday 19 December Chris Double wrote:

Using the Ubuntu 16.10 snapshot from 15 December (or a build from
master) I can't seem to get "import Foundation" or "import Glibc"
working in the REPL. Here's an example:

-----------------8<------------------
$ swift
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
       ^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
       ^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
       ^

error: could not build Objective-C module 'SwiftGlibc'
-----------------8<------------------

This works fine if I use 'swiftc' and compile a file:

$ cat x.swift
import Glibc

print(random())

$ swiftc x.swift
$ ./x
...
-----------------8<------------------

If I explicitly pass include paths to 'swift' it works in the REPL:

-----------------8<------------------
$ swift -I/home/user/swift-install/usr/lib/swift/clang/include/
-I/home/user/swift-install/usr/include/lldb/Symbol/
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
2> random()
$R0: Int = 1804289383
-----------------8<------------------

Is there some setting or installation setup step I'm missing?

--
http://bluishcoder.co.nz
_______________________________________________
swift-users mailing list
swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users

_______________________________________________
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swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users

_______________________________________________
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swift-users@swift.org
https://lists.swift.org/mailman/listinfo/swift-users

Peter_Ronnquist · January 30, 2017, 9:31pm

Bug report is here:

github.com/apple/llvm-project

[SR-3794] import Glibc does not work from the swift 3.1-dev REPL

opened 09:29PM - 30 Jan 17 UTC

closed 05:01AM - 29 Oct 19 UTC

swift-ci

bug LLDB for Swift Linux REPL

| | | |------------------|-----------------|… |Previous ID | SR-3794 | |Radar | None | |Original Reporter | Ronnquist (JIRA User) | |Type | Bug | |Status | Resolved | |Resolution | Done | <details> <summary>Environment</summary> Ubuntu 16.10 swift -v Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad, Swift ca7046e4a3) Target: x86_64-unknown-linux-gnu /home/peter/Documents/programs/swift/swift-DEVELOPMENT-SNAPSHOT-2017-01-04-a-ubuntu16.10/usr/bin/lldb "--repl=-disable-objc-interop -color-diagnostics" Welcome to Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad, Swift ca7046e4a3). </details> <details> <summary>Additional Detail from JIRA</summary> | | | |------------------|-----------------| |Votes | 10 | |Component/s | LLDB for Swift | |Labels | Bug, Linux, REPL | |Assignee | None | |Priority | Medium | md5: 68542641f5966ad72f7a08689e36c7b3 </details> **is duplicated by**: * [SR-3868](https://bugs.swift.org/browse/SR-3868) Unable to import Glibc, Foundation or Dispatch in REPL (linux) **relates to**: * [SR-3648](https://bugs.swift.org/browse/SR-3648) Unable to Import Foundation * [SR-5524](https://bugs.swift.org/browse/SR-5524) Importing a modulemapped C library in REPL throws an error **Issue Description:** I get the following error when I try to import Glibc in the swift 3.1-dev REPL peter@peter-UX305CA:\~/Documents/dev/swift/measurement$ swift -v Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad, Swift ca7046e4a3) Target: x86_64-unknown-linux-gnu /home/peter/Documents/programs/swift/swift-DEVELOPMENT-SNAPSHOT-2017-01-04-a-ubuntu16.10/usr/bin/lldb "--repl=-disable-objc-interop -color-diagnostics" Welcome to Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad, Swift ca7046e4a3). Type :help for assistance. 1\> import Glibc \<module-includes\>:3:10: note: in file included from \<module-includes\>:3: \#include "///usr/include/utmp.h" ^ ///usr/include/utmp.h:23:10: note: in file included from ///usr/include/utmp.h:23: \#include \<sys/types.h\> ^ error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error: 'stddef.h' file not found \#include \<stddef.h\> ^ error: could not build Objective-C module 'SwiftGlibc' 1\>

Nice that it is easy to make bug reports.

···

On Mon, Jan 30, 2017 at 10:17 PM, Peter Ronnquist <peter.ronnquist@gmail.com> wrote:

Michael, I did the following to get the error:

----------------------------------------------------------
peter@peter-UX305CA:~/Documents/dev/swift/measurement$ swift -v
Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad, Swift ca7046e4a3)
Target: x86_64-unknown-linux-gnu
/home/peter/Documents/programs/swift/swift-DEVELOPMENT-SNAPSHOT-2017-01-04-a-ubuntu16.10/usr/bin/lldb
"--repl=-disable-objc-interop -color-diagnostics"
Welcome to Swift version 3.1-dev (LLVM 3e67f314a4, Clang 0540ceb7ad,
Swift ca7046e4a3). Type :help for assistance.
  1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
         ^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
         ^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
         ^

error: could not build Objective-C module 'SwiftGlibc'

  1>
----------------------------------------------------------

Mishal, I'll file a bug.

Thank you all for your assistance.

On Mon, Jan 30, 2017 at 10:07 PM, mishal_shah <mishal_shah@apple.com> wrote:

Hi Peter,

Can you please file a bug (bugs.swift.org)? I am also seeing same error.

Thanks,
Mishal Shah

On Jan 30, 2017, at 12:15 PM, Michael Gottesman via swift-users >> <swift-users@swift.org> wrote:

Peter, what are you doing specifically. I.e. are you passing any arguments
to swift or something like that? Can you give a full reproducer?

Also can you type swift -v to confirm the version #?

Michael

On Jan 30, 2017, at 12:04 PM, Michael Gottesman via swift-users >> <swift-users@swift.org> wrote:

Interesting... it looks like we /do/ have an integration test that imports
glibc into the repl:

https://github.com/apple/swift-integration-tests/blob/master/repl/test-repl-glibc.py

Probably could use one that imports Foundation though.

Michael

On Jan 30, 2017, at 12:00 PM, Michael Gottesman <mgottesman@apple.com> >> wrote:

Hmm... this sounds like this may be a good integration test. I am not sure
what is going on here though. If I have a moment I will take a look a bit
later today.

Michael

On Jan 28, 2017, at 1:22 PM, Peter Ronnquist via swift-users >> <swift-users@swift.org> wrote:

I have the same problem with importing Glibc into the REPL with "Swift
3.1 Development", Ubuntu 16.10, Jan 22, 2017, that was reported on the
snapshot from 15 December (see below).

Is this working for anyone?

Best Regards
Peter Ronnquist

On Monday 19 December Chris Double wrote:

Using the Ubuntu 16.10 snapshot from 15 December (or a build from
master) I can't seem to get "import Foundation" or "import Glibc"
working in the REPL. Here's an example:

-----------------8<------------------
$ swift
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
<module-includes>:3:10: note: in file included from <module-includes>:3:
#include "///usr/include/utmp.h"
       ^

///usr/include/utmp.h:23:10: note: in file included from
///usr/include/utmp.h:23:
#include <sys/types.h>
       ^

error: /usr/include/x86_64-linux-gnu/sys/types.h:146:10: error:
'stddef.h' file not found
#include <stddef.h>
       ^

error: could not build Objective-C module 'SwiftGlibc'
-----------------8<------------------

This works fine if I use 'swiftc' and compile a file:

$ cat x.swift
import Glibc

print(random())

$ swiftc x.swift
$ ./x
...
-----------------8<------------------

If I explicitly pass include paths to 'swift' it works in the REPL:

-----------------8<------------------
$ swift -I/home/user/swift-install/usr/lib/swift/clang/include/
-I/home/user/swift-install/usr/include/lldb/Symbol/
Welcome to Swift version 3.1-dev (LLVM 7d4a331ed3, Clang d8c33dc710,
Swift 2ea7951d05). Type :help for assistance.
1> import Glibc
2> random()
$R0: Int = 1804289383
-----------------8<------------------

Is there some setting or installation setup step I'm missing?

--
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