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RE: How do I link to nptl?



I see. It should be like 
> gcc -o ex1 ex1.c
-Wl,-rpath,/lib/nptl,-dynamic-linker,/lib/nptl/ld-linux.so.2 \
> /lib/nptl/libpthread.so.0 /lib/nptl/libc.so.6

Now the binary can be linked directly to nptl libraries. 

Thanks
Bingwei

> -----Original Message-----
> From: Ferdinand [mailto:fw scenic mine nu]
> Sent: 2002年10月30日 19:23
> To: phil-list redhat com
> Subject: Re: How do I link to nptl?
> 
> 
> Liu, Bing Wei wrote:
>  >
>  > 14. find a common case, e.g. ex1.c of Linuxthreads examples
>  > 15. cp -d libc*so* /lib/nptl
>  > 16. cp -d elf/ld*so* /lib/nptl
>  > 17. cp -d nptl/libpthread*so* /lib/nptl
>  > 18. gcc -o ex1 ex1.c -lpthread
>  > -Wl,-dynamic-linker,/lib/nptl/ld-linux.so.2,-rpath,/lib/nptl
>  > /lib/libc.so.6: undefined reference to '__libc_stack_end GLIBC_2 1'
>  > collect2: ld returned 1 exit status
>  >
>  > Another question, you see I have used "with-tls" option. 
> However, if
>  > I export 
> LD_LIBRARY=/home/nptl/glibc:/home/nptl/glibc/nptl, I sttill
>  > got error message "cannot handle file 'libc.so.6' with TLS 
> data". By
>  > the way, what does TLS stand for? I only know it's a feature
>  > introduced into the kernel.
>  >
>  > Thanks
>  > Bingwei
>  >
> 
> TLS stands for Thread-Local Storage, you can read all on it at
> http://people.redhat.com/drepper/tls.pdf .
> The reason you run into that linktime problem is because you're still
> linking to the older libc.so.6; the announcement for nptl-0.1 (
> http://marc.theaimsgroup.com/?l=linux-kernel&m=103248252713576&w=2 )
> shows how to link your code correctly. The example needs to 
> be adapted a
> little, but it should be clear enough from there.
> The runtime error message is generated by a non-TLS libc (or programs
> linked to it statically), it will refuse to work with TLS 
> enabled files.
> Finally, you don't need linuxthreads when building glibc with nptl.
> 
> I hope this covers some of your questions.
> 
>   Ferdinand
> 
> 
> 
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