Open Radar

 
I am mistaken. It's strange that the results of otool -l vary for a binary which includes just arm64 and armv7 targets versus when a binary includes arm64, armv7, i386, and x86_64. In the first case, otool -l prints a header indicating the architecture and then its details. In the second case, otool -l prints a header with no indication of the architecture, followed by what would be printed if one calls otool -arch arm64 -l, but without the __bundle / __LLVM section.

I'm able to verify the presence of bitcode in the universal binary by running:

otool -arch arm64 -l ~/Desktop/MissingBitcode | grep __LLVM
otool -arch armv7 -l ~/Desktop/MissingBitcode | grep __LLVM
This issue has been verified as resolved and can be closed.

Summary:
lipo deletes Bitcode segments when merging iOS and OS X code, as one might do in order to ship a single .framework which can be used for both the devices and the Simulator. We ship armv7, arm64, i386, and x86_64 in our TextExpander.framework's binary. We do this by building the iOS and OS X versions separately and using lipo to merge the binaries.

Steps to Reproduce:
Using OS X 10.11 Beta 3 (15A216g):

1. In Terminal, run:

sudo xcode-select -s /Applications/Xcode-beta.app/

2. Download the attached files: TextExpander_iOS_with_bitcode and TextExpander_OSX and place them on your Desktop

3. Validate that TextExpander_iOS_with_bitcode contains Bitcode by running this in Terminal:

otool -l ~/Desktop/TextExpander_iOS_with_bitcode | grep __LLVM

The result should be:

    segname __LLVM
    segname __LLVM

These are the bitcode segments for armv7 and arm64.

4. Merge the OS X code by running this in Terminal:

cd ~/Desktop
lipo -create TextExpander_iOS_with_bitcode TextExpander_OSX -output MissingBitcode

5. Validate that the merged MissingBitcode contains Bitcode by running this in Terminal:

otool -l MissingBitcode | grep __LLVM


Expected Results:
Expected result from step #5:
    segname __LLVM
    segname __LLVM


Actual Results:
Actual result from step #5:
(Nothing. No matches.)

Using lipo to merge iOS and OS X code strips the Bitcode segments from the iOS code.

Version:
Xcode 7.0 beta 3 (7A152u)
OS X 10.11 Beta 3 (15A216g)

Notes:


Configuration:
MacBook Pro (Retina, 15-inch, Late 2013)
2.6 GHz Intel Core i7
16 GB 1600 MHz DDR3
NVIDIA GeForce GT 750M 2048 MB

Attachments: