Hi Lucas,

With Swift there is a required standard dylib that must be included (and Xcode 
copies by default). So perhaps CMake should automatically add the rpath option 
to the Xcode command line?

Harry

From: Lucas Šoltić <lucas.sol...@orange.fr>
Date: Friday, 2 March 2018 at 23:20
To: Harry Mallon <Harry.Mallon@codex.online>
Cc: "cmake@cmake.org" <cmake@cmake.org>
Subject: Re: [CMake] Swift executables with MACOSX_BUNDLE fail to find 
libswiftCore.dylib

You miss a runtime search path when linking your executable. And this is what 
you achieved with install_name_tool with an additional step.

To avoid this additional step, see 
https://developer.apple.com/library/content/documentation/DeveloperTools/Conceptual/DynamicLibraries/100-Articles/RunpathDependentLibraries.html
or
https://stackoverflow.com/questions/42613881/adding-run-time-shared-library-search-path-to-executable-at-compile-time-clang

By the way this is not related to Swift at all.

Lucas

Le 2 mars 2018 à 20:12, Harry Mallon 
<Harry.Mallon@codex.online<mailto:Harry.Mallon@codex.online>> a écrit :
Hello all,

When making a pure Swift bundle Xcode automatically copies `libswiftCore.dylib` 
as follows.

```
./Tests/SwiftOnly/Debug/SwiftOnly.app
└── Contents
    ├── Frameworks
    │   └── libswiftCore.dylib
    ├── Info.plist
    ├── MacOS
    │   └── SwiftOnly
    ├── PkgInfo
    └── Resources
        └── libswiftRemoteMirror.dylib
```
When I try to run the output I get a dynamic linking error. I can reproduce 
this by adding MACOSX_BUNDLE to `./Tests/SwiftOnly/CMakeLists.txt` (in the 
CMake source tree) in `add_executable` and trying to run the result.

```
% ./Tests/SwiftOnly/Debug/SwiftOnly.app/Contents/MacOS/SwiftOnly
dyld: Library not loaded: @rpath/libswiftCore.dylib
  Referenced from: 
.../Tests/SwiftOnly/Debug/SwiftOnly.app/Contents/MacOS/SwiftOnly
  Reason: image not found
zsh: abort      ./Tests/SwiftOnly/Debug/SwiftOnly.app/Contents/MacOS/SwiftOnly
```

It seems that the rpath should be set to `@loader_path/../Frameworks`. I am not 
a Swift maestro so not exactly sure on the details of how this works. After 
running `install_name_tool -add_rpath "@loader_path/../Frameworks" 
./Tests/SwiftOnly/Debug/SwiftOnly.app/Contents/MacOS/SwiftOnly` it runs fine.

Does anyone have any idea what to do? Is it a missing CMake Swift feature? We 
are currently working around it by manually adding the rpath with a cmake step.

Harry

Harry Mallon

Senior Software Engineer

[Image removed by sender.]<https://codex.online/>

T +44 203 7000 989<callto:+44%20203%207000%20989>

60 Poland Street | London | England | W1F 7NT
[Image removed by sender.]

Three Billboards

Blade Runner 2049

 I, Tonya


--

Powered by www.kitware.com<http://www.kitware.com>

Please keep messages on-topic and check the CMake FAQ at: 
http://www.cmake.org/Wiki/CMake_FAQ

Kitware offers various services to support the CMake community. For more 
information on each offering, please visit:

CMake Support: http://cmake.org/cmake/help/support.html
CMake Consulting: http://cmake.org/cmake/help/consulting.html
CMake Training Courses: http://cmake.org/cmake/help/training.html

Visit other Kitware open-source projects at 
http://www.kitware.com/opensource/opensource.html

Follow this link to subscribe/unsubscribe:
https://cmake.org/mailman/listinfo/cmake
-- 

Powered by www.kitware.com

Please keep messages on-topic and check the CMake FAQ at: 
http://www.cmake.org/Wiki/CMake_FAQ

Kitware offers various services to support the CMake community. For more 
information on each offering, please visit:

CMake Support: http://cmake.org/cmake/help/support.html
CMake Consulting: http://cmake.org/cmake/help/consulting.html
CMake Training Courses: http://cmake.org/cmake/help/training.html

Visit other Kitware open-source projects at 
http://www.kitware.com/opensource/opensource.html

Follow this link to subscribe/unsubscribe:
https://cmake.org/mailman/listinfo/cmake

Reply via email to