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

["adhemerval.zanella at linaro dot org" <sourceware-bugzilla@sourceware.org>]

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

--- Comment #13 from Adhemerval Zanella <adhemerval.zanella at linaro dot org> ---
And I just hacked build-many-glibcs.py to generate a mipsel-linux-gnu toolchain
to mimic buildroot configuration:

diff --git a/scripts/build-many-glibcs.py b/scripts/build-many-glibcs.py
index da9b905900..ae55183568 100755
--- a/scripts/build-many-glibcs.py
+++ b/scripts/build-many-glibcs.py
@@ -283,12 +283,14 @@ class Context(object):
                                  'ccopts': '-mabi=32'},
                                 {'variant': 'n64-nan2008-soft',
                                  'ccopts': '-mabi=64'}])
+        self.add_config(arch='mipsel',
+                        os_name='linux-gnu',
+                        gcc_cfg=['--with-mips-plt', '--with-arch=mips32r3',
'--with-abi=32',
+                                 '--with-nan=legacy', '--with-fp-32=xx',
'--disable-multilib'])
         self.add_config(arch='mips64el',
                         os_name='linux-gnu',
                         gcc_cfg=['--with-mips-plt'],
                         glibcs=[{'variant': 'n32'},
-                                {'arch': 'mipsel',
-                                 'ccopts': '-mabi=32'},
                                 {'variant': 'n64',
                                  'ccopts': '-mabi=64'}])
         self.add_config(arch='mips64el',

And the bootstrap finished without any issue using gcc11 release branch,
binutils 2.39, and glibc 2.36.  Checking the generated stage1 gcc, the libgcc.a
does not have any __register_frame:

$ build/compilers/mipsel-linux-gnu$ ./binutils/binutils/objdump -t
./gcc/mipsel-glibc-linux-gnu/libgcc/libgcc.a | grep __register_frame
$
$ ./binutils/binutils/objdump -t
./gcc/mipsel-glibc-linux-gnu/libgcc/libgcc_eh.a | grep __register_frame
00001f9c g     F .text  000000e0 .hidden __register_frame_info_bases
0000207c g     F .text  000000e0 .hidden __register_frame_info
0000215c g     F .text  00000068 .hidden __register_frame
000021c4 g     F .text  000000c0 .hidden __register_frame_info_table_bases
00002284 g     F .text  000000c0 .hidden __register_frame_info_table
00002344 g     F .text  000000e0 .hidden __register_frame_table

So now I even more confident it is something on buildroot environment that is
generating a wrong stage1 gcc build.

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