[LLVMdev] pthread?

[Chris Lattner]

On Tue, 23 Dec 2003, Kevin Gibbs wrote:

> Try
> llvmgcc pthread.c -o pthread.ll -pthread
>
> You have to link in the pthreads library, and I believe -pthread is all you
> need on a redhat 9 box.

Yup, in theory this should work.  However, in practice it looks like it
doesn't, on redhat 8 at least.  The problem is that (in RH8)
/usr/lib/libpthread.so is not actually a library, it's a linker script.

Because of this you might need to edit the script generated by gccld (the
pthread.ll file in your case) to pass '--load libpthread.so.0' into lli
before the $0.bc argument.  This should give you something like this:

---
#!/bin/sh
lli \
  --load=/lib/libpthread.so.0 \
  $0.bc $*
---

I think that will work.  If it doesn't, please let me know.  You might
have to adjust the .so file name to be whatever the linker script says, if
necessary.

-Chris


> > -----Original Message-----
> > From: llvmdev-admin at cs.uiuc.edu [mailto:llvmdev-admin at cs.uiuc.edu] On
> > Behalf Of yue
> > Sent: Tuesday, December 23, 2003 11:43 PM
> > To: llvmdev at cs.uiuc.edu
> > Subject: [LLVMdev] pthread?
> >
> > hi,
> >
> > I compile a pthread program using llvmgcc, but when i run pthread.ll, it
> > show:
> > ------------------
> > [yue at RH9 test]$ llvmgcc pthread.c -o pthread.ll
> > [yue at RH9 test]$ ls
> > pthread  pthread.c  pthread.ll  pthread.ll.bc
> > [yue at RH9 test]$ ./pthread.ll
> > Creating thread 0
> > WARNING: Cannot resolve fn 'pthread_create' using a dummy noop function
> > instead!
> > ERROR; return code from pthread_create() is -1073745164
> > [yue at RH9 test]$
> > --------------------
> > how to solve the problem?
> >
> > yueqiang
> > 2003/12/24
> >
> > _______________________________________________
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>
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>

-Chris

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