What steps will reproduce the problem?

1. Successfully build toolchain against MacOSX10.4u SDK and iPod Touch 2.0.2 firmware and filesystem, following issue 141 and patch provided in issue 145.

2. Compile and link following code:

   import <UIKit/UIKit.h>

   int main (int argc, char** argv) { NSAutoreleasePool* autoreleasePool = [[NSAutoreleasePool alloc] init]; return 0; }

   $ /usr/local/bin/arm-apple-darwin-gcc -c main.m -o main.o $ /usr/local/bin/arm-apple-darwin-gcc -lobjc -framework CoreFoundation -framework Foundation -framework UIKit -o MyApp main.o

What is the expected output? What do you see instead?

I get the following error:

/usr/local/bin/arm-apple-darwin-ld: Undefined symbols:
.objc_class_name_NSAutoreleasePool
collect2: ld returned 1 exit status

What version of the product are you using? On what operating system?

Toolchain built as per wiki instructions with issue 141 and issue 145. Ubuntu 7.10 on AMD64.

Please provide any additional information below.

It basically doesn't find any of the framework symbols. A couple of months ago, I had built the toolchain against the same iPod Touch but with an old 1.x firmware and filesystem, and everything was fine then, I could build and run my application fine.

I can't find something like /usr/local/bin/arm-apple-darwin-ld: Undefined symbols: .objc_class_name_NSAutoreleasePool .objc_class_name_UIApplication .objc_class_name_UIHardware .objc_class_name_UITextView .objc_class_name_UIView .objc_class_name_UIWindow

Got the same problem:

/usr/local/bin/arm-apple-darwin-ld: Undefined symbols: .objc_class_name_NSAutoreleasePool .objc_class_name_UIApplication .objc_class_name_UIHardware .objc_class_name_UITextView .objc_class_name_UIView

.objc_class_name_UIWindow

Can anyone help, please?

P.S. Makefile in attach.

Does anyone have a solution for this problem yet? I was able to link it somehow before, but now i'm stuck again

Anyone have idea how to solve this?

Is that because the framework on iphone not compatible with this toolchain anymore? I'm using firmware 2.2.1

Thanks, really need a answer

I have the same Problem, i have tested it on 32Bit "openSUSE 10.3" and cygwin Windows 32Bit, both exctly the same problem.

I'm using firmware 2.2.1

Regards, Christian

I have the same problem on cygwin/XP, firmware 2.2.1 (5H11), toolchain built against MacOSX10.4.Universal.pkg, using svn revisions from issue 141 and patches from issue 145.

I notice that the NSAutorelease symbol is displayed when running:

$ arm-apple-darwin-nm /usr/local/share/iphone-filesystem/System/Library/Frameworks/Foundation.framework/Foundation | grep NSAutorelease 306d1cac t +[NSAutoreleasePool addObject:] 3066f938 t +[NSAutoreleasePool allocWithZone:] 306c66ac t +[NSAutoreleasePool autoreleasePoolExists] 306d1b52 t +[NSAutoreleasePool autoreleasedObjectCount] 306d1b90 t +[NSAutoreleasePool enableFreedObjectCheck:] 306d1b66 t +[NSAutoreleasePool enableRelease:] 306d1bb8 t +[NSAutoreleasePool poolCountHighWaterMark] 306d1bf8 t +[NSAutoreleasePool poolCountHighWaterResolution] 30676fd0 t +[NSAutoreleasePool releaseAllPools] 306d1c44 t +[NSAutoreleasePool resetTotalAutoreleasedObjects] 306d1bd4 t +[NSAutoreleasePool setPoolCountHighWaterMark:] 306d1c14 t +[NSAutoreleasePool setPoolCountHighWaterResolution:] 306d1b48 t +[NSAutoreleasePool showPools] 306d1b5c t +[NSAutoreleasePool topAutoreleasePoolCount] 306d1c38 t +[NSAutoreleasePool totalAutoreleasedObjects] 306d1cb8 t -[NSAutoreleasePool addObject:] 306d1ad4 t -[NSAutoreleasePool autorelease] 306d1b2c t -[NSAutoreleasePool dealloc] 30672828 t -[NSAutoreleasePool drain] 3066f9d8 t -[NSAutoreleasePool initWithCapacity:] 3066f9c0 t -[NSAutoreleasePool init] 30677a90 t -[NSAutoreleasePool release] 306d1ad0 t -[NSAutoreleasePool retainCount] 306d1a78 t -[NSAutoreleasePool retain] 3066eb8c T _NSAutoreleaseObject 306d17c8 T _NSAutoreleasePoolCount 306d1844 T _NSAutoreleasePoolCountForObject 3866cb04 D _OBJC_CLASS_$_NSAutoreleasePool 3866caf4 d _OBJC_IVAR_$_NSAutoreleasePool._reserved 3866caf8 d _OBJC_IVAR_$_NSAutoreleasePool._reserved2 3866cafc d _OBJC_IVAR_$_NSAutoreleasePool._reserved3 3866cb00 d _OBJC_IVAR_$_NSAutoreleasePool._token 3866cb40 D _OBJC_METACLASS_$_NSAutoreleasePool 306d1774 T __NSAutoreleaseFreedObject 306d1788 T __NSAutoreleaseHighWaterLog 306d1c54 T __NSAutoreleaseNoPool 306d179c T __NSAutoreleasePoolGetRubyToken 306d17b0 T __NSAutoreleasePoolSetRubyToken 38690394 b ___NSAutoreleaseFreedObjectCheckEnabled 3869039c b ___NSAutoreleaseHighWaterMark 38690398 b ___NSAutoreleaseHighWaterResolution 3066ebfc t ___NSAutoreleaseObject 3866cd0c d ___NSAutoreleaseReleaseEnabled

although this doesn't appear to display the ".objc_class_name_*" name-mangling prefix that arm-apple-darwin-ld is looking for. Is there something I'm missing here ?

NB: Issue 117 appears to be a duplicate of this issue.

Sorry, should have included the LDFLAGS from my Makefile earlier:

LDFLAGS = -lobjc \ -F/usr/local/share/iphone-filesystem/System/Library/Frameworks \ -F/usr/local/share/iphone-filesystem/System/Library/PrivateFrameworks \ -framework Foundation \ -framework UIKit \ -framework CoreGraphics

which, looking at the command-lines generated in procmon.exe, runs:

C:\cygwin\usr\local\bin\arm-apple-darwin-gcc.exe -lobjc -F/usr/local/share/iphone-filesystem/System/Library/Frameworks -F/usr/local/share/iphone-filesystem/System/Library/PrivateFrameworks -framework Foundation -framework UIKit -framework CoreGraphics -o Example Example.o

[...]

C:\cygwin\usr\local\libexec\gcc\arm-apple-darwin\4.0.1\collect2.exe -dynamic -arch arm -macosx_version_min 10.4 -syslibroot /usr/local/share/iphone-filesystem -weak_reference_mismatches non-weak -o Example -lcrt1.o -L/usr/local/lib/gcc/arm-apple-darwin/4.0.1 -L/usr/local/lib/gcc/arm-apple-darwin/4.0.1/../../../../arm-apple-darwin/lib -lobjc -framework Foundation -framework UIKit -framework CoreGraphics Example.o -lgcc -lSystem -F/usr/local/share/iphone-filesystem/System/Library/Frameworks -F/usr/local/share/iphone-filesystem/System/Library/PrivateFrameworks

[... and ...]

C:\cygwin\usr\local\bin\arm-apple-darwin-ld.exe -dynamic -arch arm -macosx_version_min 10.4 -syslibroot /usr/local/share/iphone-filesystem -weak_reference_mismatches non-weak -o Example -lcrt1.o -L/usr/local/lib/gcc/arm-apple-darwin/4.0.1 -L/usr/local/lib/gcc/arm-apple-darwin/4.0.1/../../../../arm-apple-darwin/lib -lobjc -framework Foundation -framework UIKit -framework CoreGraphics Example.o -lgcc -lSystem -F/usr/local/share/iphone-filesystem/System/Library/Frameworks -F/usr/local/share/iphone-filesystem/System/Library/PrivateFrameworks

... hope this is of use. Tempted to throw in the towel at this point and reinstall the toolchain (arg)

Okay, managed to get the example above compiling/running, but ended up using the instructions at http://www.saurik.com/id/4 using an iPod 2.0 firmware (instead of the 1.1.4 mentioned on that page), building against the MacOSX10.5 and iPhoneSDK2_0 libraries. Needed to fix some file permissions and symlinks during the process, but that may have been due to the method used to decompress the firmware.

The arm-apple-darwin9-gcc that's generated from this process will exhibit the same failure as described in this issue ("Undefined symbols: .objc_class_name_NSAutoreleasePool") if the -fobjc-abi-version=1 flag is passed to arm-apple-darwin9-gcc. If -fobjc-abi-version=2 is supplied (or if the flag is not present), then the binary appears to compile OK.

Hope this helps.

Yes, it works fine, i can now compile iPhone 2.2.1 Applications under cygwin.

Regards, Christian