[LLVMdev] llvm-ld hangs

[Ashish Bijlani]

Hi,

I'm trying to compile UML with LLVM. However, LLVM-LD hangs whiile
linking modules. It's consuming 99% of the CPU

   llvm-ld -v   -r -o kernel/built-in.o kernel/sched.o kernel/fork.o
kernel/exec_domain.o kernel/panic.o kernel/printk.o kernel/profile.o
kernel/exit.o kernel/itimer.o kernel/time.o kernel/softirq.o
kernel/resource.o kernel/sysctl.o kernel/capability.o kernel/ptrace.o
kernel/timer.o kernel/user.o kernel/user_namespace.o kernel/signal.o
kernel/sys.o kernel/kmod.o kernel/workqueue.o kernel/pid.o
kernel/rcupdate.o kernel/extable.o kernel/params.o
kernel/posix-timers.o kernel/kthread.o kernel/wait.o kernel/kfifo.o
kernel/sys_ni.o kernel/posix-cpu-timers.o kernel/mutex.o
kernel/hrtimer.o kernel/rwsem.o kernel/latency.o kernel/nsproxy.o
kernel/srcu.o kernel/die_notifier.o kernel/utsname.o
kernel/time/built-in.o kernel/futex.o kernel/rtmutex.o kernel/uid16.o
kernel/kallsyms.o kernel/acct.o kernel/configs.o kernel/ksysfs.o
kernel/softlockup.o kernel/irq/built-in.o kernel/utsname_sysctl.o
  Linking bitcode file 'kernel/sched.o'
  Linked in file 'kernel/sched.o'
  Linking bitcode file 'kernel/fork.o'
  Linked in file 'kernel/fork.o'
  Linking bitcode file 'kernel/exec_domain.o'
  Linked in file 'kernel/exec_domain.o'
  Linking bitcode file 'kernel/panic.o'
  Linked in file 'kernel/panic.o'
  Linking bitcode file 'kernel/printk.o'
  Linked in file 'kernel/printk.o'
  Linking bitcode file 'kernel/profile.o'
  Linked in file 'kernel/profile.o'
  Linking bitcode file 'kernel/exit.o'

Using GDB I could figure out that it is causing stack overflow (some
loop in the code between 0x495be5 and 0x495da7)

....
#47 0x0000000000495be5 in ?? ()
#48 0x0000000000495da7 in ?? ()
#49 0x0000000000495a24 in ?? ()
#50 0x0000000000495da7 in ?? ()
#51 0x0000000000495be5 in ?? ()
#52 0x0000000000495da7 in ?? ()
#53 0x0000000000495be5 in ?? ()
#54 0x0000000000495da7 in ?? ()
#55 0x0000000000495be5 in ?? ()
#56 0x0000000000495da7 in ?? ()
#57 0x0000000000495be5 in ?? ()
#58 0x0000000000495da7 in ?? ()
#59 0x0000000000495be5 in ?? ()
#60 0x0000000000495da7 in ?? ()
#61 0x0000000000495be5 in ?? ()
#62 0x0000000000495da7 in ?? ()
#63 0x0000000000495be5 in ?? ()
#64 0x000000000049609a in ?? ()
#65 0x000000000049ab6f in llvm::Linker::LinkModules ()
#66 0x0000000000491643 in llvm::Linker::LinkInFile ()
#67 0x0000000000491e57 in llvm::Linker::LinkInFiles ()
#68 0x00000000004727df in main ()

any ideas what could be wrong here? thanks.