[Bug build/26260] New: undefined reference to `_Unwind_Resume'

["sourceware@le-garrec.fr" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=26260

            Bug ID: 26260
           Summary: undefined reference to `_Unwind_Resume'
           Product: glibc
           Version: 2.31
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: sourceware@le-garrec.fr
                CC: carlos at redhat dot com
  Target Milestone: ---

I can't build glibc if gcc was built with -O0 option. I open a bug in the GCC
project (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96217) but they told me
the problem was in glibc.

The glibc log says :

/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../x86_64-pc-linux-gnu/bin/ld.bfd:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/32/libgcc.a(_divdi3.o): in function
`__divdi3':
/var/tmp/portage/sys-devel/gcc-10.1.0-r2/work/gcc-10.1.0/libgcc/libgcc2.c:1246:
undefined reference to `_Unwind_Resume'
/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../x86_64-pc-linux-gnu/bin/ld.bfd:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/32/libgcc.a(_divdi3.o):(.data.rel.local.DW.ref.__gcc_personality_v0[DW.ref.__gcc_personality_v0]+0x0):
undefined reference to `__gcc_personality_v0'
/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/../../../../x86_64-pc-linux-gnu/bin/ld.bfd:
/usr/lib/gcc/x86_64-pc-linux-gnu/10.1.0/32/libgcc.a(_moddi3.o): in function
`__moddi3':
/var/tmp/portage/sys-devel/gcc-10.1.0-r2/work/gcc-10.1.0/libgcc/libgcc2.c:1269:
undefined reference to `_Unwind_Resume'

The solution is to make a change in Makeconfig :
from
gnulib = -lgcc $(gnulib-arch)
to
gnulib = -lgcc -lgcc_eh $(gnulib-arch)

What do you think of this change ? Do you think that glibc should supports -O0
compilation ?

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