libXcodeDebuggerSupport.dylib is missing in iOS 4.2.1 development SDK

Question

Note: getting this on Xcode 4.3.2? Check out the answer to this question.

Note: creating a symbolic link to use the 4.2 lib seems to work fine

cd /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1\ \(8C148\)/Symbols/ sudo ln -s ../../4.2\ \(8C134\)/Symbols/Developer 

After upgrading from 4.2.0 (beta, I believe) to 4.2.1, the libXcodeDebuggerSupport.dylib file is missing, which results in:

warning: Unable to read symbols for /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib (file not found). 

which I guess isn't good. Looking at the directory in question I note:

.../DeviceSupport/4.2 (8C134)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib 

but

.../DeviceSupport/4.2.1 (8C148)/Symbols/System/ .../DeviceSupport/4.2.1 (8C148)/Symbols/usr/ 

the above two dirs make up all the content in the 4.2.1 folder. No "Developer" folder. Checking the /usr/ dir there, I find no libXcodeDebuggerSupport.dylib file in the lib dir either, so ln -s'ing isn't an option.

Worth mentioning: after the upgrade, I plugged the iPad in and had to click "Use for development" in Xcode organizer. Doing so, I got a message about symbols missing for that version, and Xcode proceeded to generate such, then failed. I restored the iPad and did "Use for development" again, and nothing about missing symbols appeared...

Update: deletion of /Developer and reinstallation of Xcode from scratch does not fix this issue.

Update 2: I just realized that after the reinstall of Xcode,

.../DeviceSupport/4.2 (8C134)/Symbols 

is now a symbolic link,

lrwxr-xr-x  1 root  admin        36 Dec  3 17:17 Symbols -> ../../Developer/SDKs/iPhoneOS4.2.sdk 

And the directory in question has the appropriate files. Maybe this is simply a matter of linking the 4.2.1 dir in the same fashion? I'll try that and see if Xcode freaks out. If someone who has this file could provide a md5 sum that would be splendid. This is what it says for me:

$ md5 /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2\ \(8C134\)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib  MD5 (/Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2 (8C134)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib)      = 08f93a0a2e3b03feaae732691f112688 

If the MD5 sum is identical to the output of

$ md5 /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1\ \(8C148\)/Symbols/Developer/usr/lib/libXcodeDebuggerSupport.dylib  

then we're all set.

Answer 1

What I just did to solve this problem was:

cd /Developer/Platforms/iPhoneOS.platform/DeviceSupport/4.2.1 (8C148)/Symbols 

and created the symlink was missing:

ln -s ../../4.2\ \(8C134\)/Symbols/Developer/ Developer 

It solves my problem.