[Bug lto/93384] [10 Regression] Python 3.9.0a3 fails to build on ppc64le with GCC 10.0.1: redefined symbol cannot be used on reloc

[vstinner at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93384

--- Comment #12 from Victor Stinner <vstinner at redhat dot com> ---
Created attachment 47726
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47726&action=edit
preprocessed object.c (gcc -E), bzip2 compressed

Here is the gcc -E output of Objects/object.c.

Truncated extract (function body replaced with "..."):

# 446 "../Include/cpython/object.h"
__attribute__ ((visibility ("default"))) void _PyObject_AssertFailed(
    PyObject *obj,
    const char *expr,
    const char *msg,
    const char *file,
    int line,
    const char *function);

void
_PyObject_AssertFailed(PyObject *obj, const char *expr, const char *msg,
                       const char *file, int line, const char *function)
{
    ...
    Py_FatalError("_PyObject_AssertFailed");
}

I modified the command which creates Objects/object.o to get the preprocessor
output, but it's not directly related to the libpython3.9.so linking command
(which uses object.o and not object.c).