[Bug ld/26268] New: --gc-sections -u __start_cident inconsistent for -r and non-relocatable links

[i at maskray dot me]

https://sourceware.org/bugzilla/show_bug.cgi?id=26268

            Bug ID: 26268
           Summary: --gc-sections -u __start_cident inconsistent for -r
                    and non-relocatable links
           Product: binutils
           Version: unspecified
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: i at maskray dot me
  Target Milestone: ---

% cat a.s
.section cident,"a",@progbits
.byte 0
% as a.s -o a.o

% ld.bfd -r --gc-sections --print-gc-sections -u __start_cident a.o -o a
ld.bfd: removing unused section 'cident' in file 'a.o'
% ld.bfd --gc-sections --print-gc-sections -u __start_cident a.o -o a   
ld.bfd: warning: cannot find entry symbol _start; not setting start address


Non-relocatable links retain 'cident' while relocatable links discard it. I
don't know whether the rule should be consistent here.

I am also thinking how 'cident' should behave when it is in a section group.

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