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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/97787] [10/11 regression] 64bit mips lto: .symtab local
 symbol at index x (>= sh_info of y)
Date: Mon, 16 Nov 2020 12:30:15 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97787

--- Comment #8 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 13 Nov 2020, bunk at stusta dot de wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97787
>=20
> --- Comment #7 from Adrian Bunk <bunk at stusta dot de> ---
> (In reply to Richard Biener from comment #6)
> > I see.  Still GCC or GAS produces a bogus object file (the original lin=
ker
> > error).  It might be the new problem is an entirely different one?  It =
looks
> > more and more like a target problem to me.
>=20
> My guess would be that the situations where -mxgot is required on 64bit M=
IPS
> are not (no longer?) handled properly with LTO.
>=20
> Note that when compiling from precompiled sources the linker also exits w=
ith an
> error, the main difference in that case is that the correct "relocation
> truncated to fit" error message is not output in the LTO case.
>=20
> More worrisome is that adding -mxgot to compiler and linker flags did not=
 fix
> it in the LTO case.

I guess it is because -mxgot is supposed to be handled by the assembler?
I see

%{mgp32} %{mgp64} %{march=3D*} %{mxgot:-xgot} \

in ASM_SPEC.  I guess this doesn't make it to COLLECT_AS_OPTIONS
and eventually makes it dropped from COLLECT_GCC_OPTIONS as well.

Can you attach the full output of compiling & linking with -v added?

Can you try using -mxgot -Wa,-xgot or -mxgot -Xassembler -xgot at
compile time?=