Open Radar

 
Summary:
There was a regression introduced in Xcode 5.0.1's copy of strip that modifies our kext in such a way that it won't load on 10.6.

Steps to Reproduce:
This bug manifests itself if you have the strip symbols option selected in Xcode. Running strip in Terminal is sufficient to reproduce the problem.

>otool -arch i386 -lv transmitdiskfs | grep LC_FUNCTION_STARTS (returns nothing)
>strip -S transmitdiskfs -o transmitdiskfs.stripped
>otool -arch i386 -lv transmitdiskfs.stripped | grep LC_FUNCTION_STARTS (returns cmd LC_FUNCTION_STARTS)

Apparently the LC_FUNCTION_STARTS command is unrecognized on pre-10.7 systems

Expected Results:
The binary is not modified in any detrimental way when it's stripped

Regression:
We've confirmed that version 4.4.3 of Transmit Disk was build with Xcode 5.0 and it loads fine on 10.6. Further, the kext in that app is *unmodified* from the version that is in SVN despite it having been stripped. Starting with version 4.4.4, built with Xcode 5.0.1, the kext binary is different from what's in SVN.

Notes:

When a 10.6 user attempts to load the broken kext the following appears in Console:

11/21/13 10:23:04 AM	com.apple.kextd[10]	Failed to load /Users/panic/Library/Application Support/Transmit/Transmit Disk.app/Contents/Resources/transmitdiskfs.fs/Contents/Resources/com.panic.TransmitDisk.transmitdiskfs.components/transmitdiskfs.kext - (libkern/kext) link error.
11/21/13 10:23:04 AM	kernel	kxld[com.panic.TransmitDisk.transmitdiskfs]: The Mach-O file is malformed: Invalid segment type in MH_OBJECT kext: 38.
11/21/13 10:23:04 AM	kernel	Can't load kext com.panic.TransmitDisk.transmitdiskfs - link failed.
11/21/13 10:23:04 AM	kernel	Failed to load executable for kext com.panic.TransmitDisk.transmitdiskfs.
11/21/13 10:23:04 AM	kernel	Kext com.panic.TransmitDisk.transmitdiskfs failed to load (0xdc008016).
11/21/13 10:23:04 AM	kernel	Failed to load kext com.panic.TransmitDisk.transmitdiskfs (error 0xdc008016).