[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 #2 from James Hilliard <james.hilliard1 at gmail dot com> ---
(In reply to Adhemerval Zanella from comment #1)
> Are you sure it is not related on how you build your toolchain? I am asking
> because Joseph has a build service that constantly check glibc build against
> multiple architectures and we have not seen this issue [1].

It's a possibility but it's unclear what could be causing this.

> 
> I have rebuild toolchain for or1k and mips64el using gcc-10/gcc-11 along
> with binutils 2.39 and glibc-2.36 branches and I have seen only an ICE in
> the compiler when using --enable-profile with GCC (by removing the configure
> switch I could complete the build).

I'm seeing these builds failing with errors when --disable-profile is passed:
http://autobuild.buildroot.net/results/883/883b171a856a63540908976592683527fdb21cd2/glibc-2.36-44-g2628500f5dff1dd99c49a09b418b3b1ea3a6b5d3/build/config.log
http://autobuild.buildroot.net/results/883/883b171a856a63540908976592683527fdb21cd2/build-end.log

Configured like this looks like(note that autobuilder host is aarch64 based,
however I'm seeing similar errors on our x86_64 build hosts):
/home/autobuild/autobuild/instance-4/output-1/build/glibc-2.36-44-g2628500f5dff1dd99c49a09b418b3b1ea3a6b5d3/configure
--target=mipsel-buildroot-linux-gnu --host=mipsel-buildroot-linux-gnu
--build=aarch64-unknown-linux-gnu --prefix=/usr --enable-shared
--with-pkgversion=Buildroot --disable-profile --disable-werror --without-gd
--with-headers=/home/autobuild/autobuild/instance-4/output-1/host/mipsel-buildroot-linux-gnu/sysroot/usr/include
--enable-kernel=5.16

Easiest way to reproduce buildroot autobuilder errors is like this(using config
for above failure as an example):
git clone https://github.com/buildroot/buildroot.git
cd buildroot
wget
http://autobuild.buildroot.net/results/883/883b171a856a63540908976592683527fdb21cd2/config
mv config .config
make glibc

To make the same build using your normal local glibc git tree for testing glibc
changes:
Simply create a local.mk file inside the buildroot tree:
echo "GLIBC_OVERRIDE_SRCDIR = /home/buildroot/glibc" > local.mk

Then to rebuild/resync testing changes from your local glibc checkout:
make glibc-rebuild

Reference manual for local.mk overrides:
https://buildroot.org/downloads/manual/manual.html#_using_buildroot_during_development

> 
> [1] https://sourceware.org/pipermail/libc-testresults/2022q3/009900.html

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