[CMake] Packaging dylibs into app bundles

[Harry Mallon]

Hi all,

Fixup_bundle works very well for app bundles and seems to be the way to go! The problem I was previously seeing was fixed by setting CMAKE_INSTALL_RPATH_USE_LINK_PATH to True. This fills in the rpath on the installed executable with enough paths to resolve all the dylibs.

I also added a merge request to cmake to fail more obviously if the file cannot be found as in previous message.

My next question is: Is there a way to do a fixup bundle without a bundle?

i.e. I want to fixup (copy required dylibs, fix otool ids and rpaths etc) a structure like this:

/usr/local/myapp/bin/myapp
/usr/local/myapp/lib/libA.dylib
/usr/local/myapp/lib/libB.dylib # etc


Is there a sensible way to do this without rewriting a lot of Bundle Utilities?

Best,
Harry


From: Harry Mallon <Harry.Mallon at codex.online>
Date: Thursday, 19 July 2018 at 19:04
To: Stephen McDowell <sjm324 at cornell.edu>
Cc: CMake MailingList <cmake at cmake.org>
Subject: Re: [CMake] Packaging dylibs into app bundles

Hi,

I have been messing arounds with fixup_bundle (which seems to be the correct function). It worked for a small test case, but only if the dylibs required had otool ids of their full path. Ours currently have rpath based ones (e.g. @rpath/libcrypto.dylib). So I get a lot of:

/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/objdump: '@rpath/ libcrypto.dylib’: No such file or directory

Hmm, seems like the stuff is there somewhere to make this work…

Best,
Harry

From: Stephen McDowell <sjm324 at cornell.edu>
Date: Thursday, 19 July 2018 at 17:35
To: Harry Mallon <Harry.Mallon at codex.online>
Cc: CMake MailingList <cmake at cmake.org>
Subject: Re: [CMake] Packaging dylibs into app bundles

Hi Harry,

I don't know how useful this will be, but the Instant Meshes application creates an app bundle that has always worked reliably for me. Looking at the code, it doesn't appear like there's much custom stuff going on either. It starts here

https://github.com/wjakob/instant-meshes/blob/011fa44ab72037cbc16535090a63ead41963c1e5/CMakeLists.txt#L151

And there's an if APPLE block below that appears to be the core.

Hope that is useful :) I've never actually done this for any of my own projects though. And I'm pretty sure them setting the underlying GUI library and TBB to be static (as opposed to shared) is skirting around the issue that you are trying to solve (dylib stuff)...

-Stephen

On Thu, Jul 19, 2018, 9:03 AM Harry Mallon <Harry.Mallon at codex.online> wrote:
Hello all,

Is there a good tutorial/article on getting CMake to package required dylibs and frameworks into an app bundle for you on mac. We have a lot of custom stuff to do it and it is fragile and breaks a lot.

Thanks,
Harry

Harry Mallon

Senior Software Engineer

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