[Bug lto/97586] New: "make check" failures in binutils with -flto=jobserver

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97586

            Bug ID: 97586
           Summary: "make check" failures in binutils with -flto=jobserver
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: hjl.tools at gmail dot com
                CC: marxin at gcc dot gnu.org
  Target Milestone: ---

On Linux/x86-64, with GCC 11

commit 4f8cfb42883cc247f11096a3703e379d1f24ab3f
Author: Jan Hubicka <jh@suse.cz>
Date:   Mon Oct 26 20:19:33 2020 +0100

    Extend builtin fnspecs

"make check" on binutils users/hjl/lto branch:

https://gitlab.com/x86-binutils/binutils-gdb/-/commits/users/hjl/lto

gave

FAIL: nm --line-numbers on DWARF-4 debug info (grep for externd global
file/line)
FAIL: build-id-debuglink (grepping for source file name in disassembly output)
FAIL: objdump -S
FAIL: objdump --source-comment
FAIL: DWARF2 debugging information 2
FAIL: DWARF2 debugging information 2 with SHF_COMPRESSED
FAIL: 64bit DWARF2 debugging information 2
FAIL: 64bit DWARF2 debugging information 2 with SHF_COMPRESSED
FAIL: DWARF parse during linker error
FAIL: Build warn libbar.so
FAIL: Dump pr21978.so
FAIL: Run warn with versioned libfoo.so
FAIL: undefined symbol with compressed debug sections
FAIL: PR ld/12760
FAIL: plugin claimfile lost symbol
FAIL: plugin claimfile replace symbol
FAIL: plugin claimfile resolve symbol
FAIL: plugin claimfile lost symbol with source
FAIL: plugin claimfile replace symbol with source
FAIL: plugin claimfile resolve symbol with source
FAIL: plugin 2 with source lib
FAIL: load plugin 2 with source
FAIL: plugin 3 with source lib
FAIL: load plugin 3 with source
FAIL: undefined line
FAIL: undefined line
FAIL: undefined symbol with compressed debug sections

when compiled with -O2 -g -flto=jobserver.