[Bug ld/27495] New: -z start_stop_gc isn't compatible with --gc-sections

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=27495

            Bug ID: 27495
           Summary: -z start_stop_gc isn't compatible with --gc-sections
           Product: binutils
           Version: 2.37 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: ld
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: amodra at gmail dot com, i at maskray dot me
            Blocks: 11133, 19161, 19167, 20022, 21562
  Target Milestone: ---

On Linux/x86-64, with

diff --git a/ld/ldmain.c b/ld/ldmain.c
index 7a3c02aeaa6..3b2ebe168c6 100644
--- a/ld/ldmain.c
+++ b/ld/ldmain.c
@@ -357,7 +357,7 @@ main (int argc, char **argv)
 #ifdef DEFAULT_NEW_DTAGS
   link_info.new_dtags = DEFAULT_NEW_DTAGS;
 #endif
-  link_info.start_stop_gc = FALSE;
+  link_info.start_stop_gc = TRUE;
   link_info.start_stop_visibility = STV_PROTECTED;

   ldfile_add_arch ("");

I got

FAIL: ld-elf/pr21562a
FAIL: ld-elf/pr21562b
FAIL: ld-elf/pr21562c
FAIL: ld-elf/pr21562d
FAIL: ld-elf/pr21562i
FAIL: ld-elf/pr21562j
FAIL: ld-elf/pr21562k
FAIL: ld-elf/pr21562l
FAIL: ld-elf/pr21562m
FAIL: ld-elf/pr21562n
FAIL: --gc-sections with __start_
FAIL: ld-gc/pr19167
FAIL: pr20022
FAIL: --gc-sections with __start_SECTIONNAME


Referenced Bugs:

https://sourceware.org/bugzilla/show_bug.cgi?id=11133
[Bug 11133] gc-sections deletes sections with __start/__stop reference
https://sourceware.org/bugzilla/show_bug.cgi?id=19161
[Bug 19161] GNU ld wrongly garbage collects section referenced via
__start_SECTIONNAME
https://sourceware.org/bugzilla/show_bug.cgi?id=19167
[Bug 19167] --gc-sections is broken with __start_
https://sourceware.org/bugzilla/show_bug.cgi?id=20022
[Bug 20022] --gc-sections is broken with __start_ and shared library
https://sourceware.org/bugzilla/show_bug.cgi?id=21562
[Bug 21562] Refs to __start_SCN of non-orphan sections affect --gc-sections
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