optimization/6871: const objects shouldn't be moved to .bss

optimization/6871: const objects shouldn't be moved to .bss

[drepper]

>Number:         6871
>Category:       optimization
>Synopsis:       const objects shouldn't be moved to .bss
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 30 08:56:02 PDT 2002
>Closed-Date:
>Last-Modified:
>Originator:     Ulrich Drepper
>Release:        gcc CVS trunk 2002-05-29
>Organization:
>Environment:
x86 Linux
>Description:
The gcc CVS trunk contains code which moves variables which are initialized with all zeros into .bss (instead of .data).  But the current gcc doesn't stop there: it also moves constants into .bss instead of .text.  This is not what should happen since the .bss cannot be shared, unlike the .text.
>How-To-Repeat:
Compile the attached file with
  gcc -O2 -c u.c

The variable should be in .text and not in .bss.
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
Content-Type: application/octet-stream; name="u.c"
Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="u.c"

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