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From: "marxin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug lto/99618] New: `.gnu.debuglto_.debug_macro' referenced in
 section `.gnu.debuglto_.debug_macro' of X defined in discarded section
Date: Tue, 16 Mar 2021 13:11:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99618

            Bug ID: 99618
           Summary: `.gnu.debuglto_.debug_macro' referenced in section
                    `.gnu.debuglto_.debug_macro' of X defined in discarded
                    section
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: lto
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
                CC: marxin at gcc dot gnu.org, rguenth at gcc dot gnu.org
  Target Milestone: ---

I'm not sure if it's problem at compiler or linker side. Reduced from perf
package:

$ cat 1.i
;
# 1 "/usr/include/bits/wordsize.h" 1=20=20
#define __WORDSIZE 64
#define __WORDSIZE_TIME64_COMPAT32 1

$ gcc -flto -ggdb3 -c -fPIC -g 1.i && cp 1.o 2.o && gcc -r -o libperf-in.o
[12].o -fuse-ld=3Dbfd
`.gnu.debuglto_.debug_macro' referenced in section `.gnu.debuglto_.debug_ma=
cro'
of /tmp/ccnBoXGI.debug.temp.o: defined in discarded section
`.gnu.debuglto_.debug_macro[wm4.wordsize.h.1.b68ef8235bd466c01307f942f7f51e=
04]'
of /tmp/ccnBoXGI.debug.temp.o
collect2: error: ld returned 1 exit status

While ld.gold is fine:

$ gcc -flto -ggdb3 -c -fPIC -g 1.i && cp 1.o 2.o && gcc -r -o libperf-in.o
[12].o -fuse-ld=3Dgold=