[Bug ld/27500] New: --gc-sections with groups and start/stop syms

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27500

            Bug ID: 27500
           Summary: --gc-sections with groups and start/stop syms
           Product: binutils
           Version: 2.37 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: amodra at gmail dot com
  Target Milestone: ---

This testcase when linked with --gc-sections does not keep bar_group, when it
should since the __start_xx reference is supposed to keep all xx input
sections.

 .text
 .global _start
_start:
 .dc.a foo
 .dc.a __start_xx, __stop_xx

 .section .text,"axG",%progbits,foo_group
 .global foo
foo:
 .dc.a 0

 .section xx,"aG",%progbits,foo_group
 .global foo_xx
foo_xx:
 .dc.a 1

 .section .text,"axG",%progbits,bar_group
 .global bar
bar:
 .dc.a 2

 .section xx,"aG",%progbits,bar_group
 .global bar_xx
bar_xx:
 .dc.a 3

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