Re: Crosstool 0.28-rc37 and NPTL capable x86 toolchain

[Dan Kegel <dank at kegel dot com>]

Stephen Warren wrote:
> I'm attempting to use crosstool 0.28-rc37 to build a host=fedora core 2,
> target=i686-unknown-linux-gnu toolchain - for the purposes of building
> an x86 target image, using a toolchain divorced from the build system.
>
> (Note: I'm aware that e.g. LFS uses a much more complex process than
> simply building a cross-compiler, so as to divorce itself completely
> from the host. I'm assuming that since crosstool forces a build of a
> cross-compiler, it's equivalent. Still, I guess the built toolchain
> still relies on the host system glibc and hence could be affected by
> bugs there at runtime, but that's no worse than if I were building cross
> to any other target I think?)
>
> Anyway, I need NPTL support for my target. So, I attempted to apply
> contrib/crosstool-0.28-rc34-nptl_fixes.patch. I ignored the errors to
> all the config files (*.dat and related), manually fixed the reject to
> getandpatch.sh, built my own config files and attempted to build.
>
> My config files are:
>
> nvidia-build-i686.sh
> ============================
> #!/bin/sh
> set -ex
> TARBALLS_DIR=/home/swarren/src/tar
> RESULT_TOP=/home/swarren/crosstool-nptl
> export TARBALLS_DIR RESULT_TOP
> GCC_LANGUAGES="c,c++"
> export GCC_LANGUAGES
> GLIBC_ADDON_NPTL=1
> export GLIBC_ADDON_NPTL
> mkdir -p $RESULT_TOP
> eval `cat nvidia-i686.dat nvidia-gcc-3.4.3-glibc-2.3.3.dat` sh all.sh --notest
> ...
> When I run this, I get an error about undefined symbols _Unwind_Resume

It kinda sounds like the resulting toolchain was generated
to use linuxthreads.

Lots of people want NPTL support, and I'm dying to get that
patch integrated and tested, but my life's a bit crazy
right now.  (And it just got a bit crazier today.)
If I'm real lucky, I'll get a day to work on this over Thanksgiving,
which isn't really enough.  Sigh...
- Dan

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