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GCC 4.1.1 unwind support for arm-none-linux-gnueabi

Hi, list.

Right now I'm building new toolchain using old one provided by our vendor.  I 
have built binutils and gcc-4.1.1 successfully.  However while building 
glibc-2.4 it always told me:

running configure fragment for nptl/sysdeps/pthread
checking for forced unwind support... no
configure: error: forced unwind support is required

I saw that gcc could be built with unwind support, but default turned off.
In gcc/Makefile.in

# Don't build libunwind by default.
LIBUNWIND =
LIBUNWINDDEP =
SHLIBUNWIND_LINK =
SHLIBUNWIND_INSTALL =

I tried to get libunwind library source to build a ``system library'', but it 
did not support arm platform.

Could anyone please give me some hints?  I need pthreads support in glibc, but 
now I am stuck on this unwind issue.  Any suggestion is appreciated.

Thanks.


Regards,
Franklin

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