[Bug libc/29621] librtld.os: in function `__register_frame': libgcc/unwind-dw2-fde.c:136: undefined reference to `malloc'

["james.hilliard1 at gmail dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29621

--- Comment #6 from James Hilliard <james.hilliard1 at gmail dot com> ---
(In reply to Adhemerval Zanella from comment #5)
> (In reply to James Hilliard from comment #4)
> > (In reply to Adhemerval Zanella from comment #3)
> > > Is there an easy way to reproduce it without resorting to build/use
> > > buildroot? I am trying to use the command you posted but it fails after
> > > downloading the kernel and I do not want to dig into builroot to debug this.
> > > 
> > > Also, could you verify what buildroot is doing differently than glibc own
> > > toolchain build script [1] so we can narrow down issue?
> > > 
> > > [1]
> > > https://sourceware.org/git/?p=glibc.git;a=blob;f=scripts/build-many-glibcs.
> > > py;h=5af6f369ae04027911b3407c64716dd1571eae6a;hb=HEAD
> > 
> > Hmm, what's the error message buildroot gives?
> > 
> > I'm not really sure how to reproduce outside of buildroot. Kind of hard to
> > narrow down what difference is triggering the issue with the toolchain build
> > script.
> 
> I just copy/paste your instructions:
> 
> ---
> git clone https://github.com/buildroot/buildroot.git
> cd buildroot
> wget
> http://autobuild.buildroot.net/results/883/
> 883b171a856a63540908976592683527fdb21cd2/config
> mv config .config
> make glibc
> ---
> 
> And after it build first stage of GCC, it tries to download the kernel and
> dumps an error:
> 
> ---
> wget --passive-ftp -nd -t 3 -O
> '/tmp/buildroot/buildroot/output/build/.linux-5.17.15.tar.xz.MfDZZc/output'
> 'https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.17.15.tar.xz'
> --2022-10-26 16:09:00-- 
> https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.17.15.tar.xz
> Resolving cdn.kernel.org (cdn.kernel.org)... 2a04:4e42:5c::432,
> 199.232.113.176
> Connecting to cdn.kernel.org (cdn.kernel.org)|2a04:4e42:5c::432|:443...
> connected.
> HTTP request sent, awaiting response... 200 OK
> Length: 128442092 (122M) [application/x-xz]
> Saving to:
> ‘/tmp/buildroot/buildroot/output/build/.linux-5.17.15.tar.xz.MfDZZc/output’
> 
> /tmp/buildroot/buildroot/output/build/.linux-5.17.15.tar.xz.MfDZZc/output   
> 100%[========================================================================
> =============================================================================
> ===============================================>] 122,49M  36,0MB/s    in
> 3,3s
> 
> 2022-10-26 16:09:08 (37,4 MB/s) -
> ‘/tmp/buildroot/buildroot/output/build/.linux-5.17.15.tar.xz.MfDZZc/output’
> saved [128442092/128442092]
> 
> ERROR: No hash found for linux-5.17.15.tar.xz
> ---

Oh, build config is out of sync with master(sometime changes in master break
previous configs), should work if you checkout the same buildroot commit that
the failure was triggered on:
git checkout e4ecf82f99f53e55d51e6f74ae5021473aa2bb1d

Full commands:
git clone https://github.com/buildroot/buildroot.git
cd buildroot
git checkout e4ecf82f99f53e55d51e6f74ae5021473aa2bb1d
wget
http://autobuild.buildroot.net/results/883/883b171a856a63540908976592683527fdb21cd2/config
mv config .config
make glibc

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