[cfe-dev] Linker error with -flto

[Chris Lattner]

On Jun 24, 2010, at 12:30 AM, Robert Purves wrote:

>>> Broken module found, compilation aborted!
>>> Stack dump:
>>> 0.	Running pass 'Function Pass Manager' on module 'ld-temp.o'.
>>> 1.	Running pass 'Module Verifier' on function '@main'
>>> clang: error: linker command failed due to signal 6 (use -v to see invocation)
>> 
>> This sounds like you're using clang with an old liblto.  Try replacing the liblto (in /usr/lib/libLTO.dylib and /Developer/usr/lib/libLTO.dylib) with the one built when you built clang.
> 
> I didn't build it. Everything is from the recent Xcode 3.2.3 release
> 
> $ ls -l /usr/lib/libLTO.dylib 
> -rwxrwxr-x  1 root  admin  25934400 11 May 11:49 /usr/lib/libLTO.dylib
> $ ls -l /Developer/usr/lib/libLTO.dylib 
> -rwxrwxr-x  1 root  admin  25934400 11 May 11:49 /Developer/usr/lib/libLTO.dylib

That turns out to be a serious bug in Xcode 3.2.3.  I'll file a bug internally, thanks!

-Chris