[Buildroot] [Bug 1339] New: Busybox needs -fno-stric-aliasing to compile cleanly

[Buildroot] [Bug 1339] New: Busybox needs -fno-stric-aliasing to compile cleanly

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1339

              Host: Gentoo Linux
            Target: Atmel ARM9
             Build: 2010.2
           Summary: Busybox needs -fno-stric-aliasing to compile cleanly
           Product: buildroot
           Version: 2010.02
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: minor
          Priority: P5
         Component: Other
        AssignedTo: unassigned at buildroot.uclibc.org
        ReportedBy: grant.b.edwards at gmail.com
                CC: buildroot at uclibc.org
   Estimated Hours: 0.0


Created an attachment (id=1315)
 --> (https://bugs.busybox.net/attachment.cgi?id=1315)
Fix strick-aliasing compiler warnings

When busybox is compiled (with gcc 4.4.3), there are thousands of
compiler warnings about code that is breaking the strict aliasing
rules that must be followed if -O2 or greater optimization level is to
be used.

Adding -fno-strict-aliasing to CFLAGS fixes this problem.

Patch is attached.


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[Buildroot] [Bug 1339] Busybox needs -fno-strict-aliasing to compile cleanly

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1339


Grant Edwards <grant.b.edwards@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Busybox needs -fno-stric-   |Busybox needs -fno-strict-
                   |aliasing to compile cleanly |aliasing to compile cleanly




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[Buildroot] [Bug 1339] Busybox needs -fno-strict-aliasing to compile cleanly

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1339


Grant Edwards <grant.b.edwards@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Attachment #1315|Fix strick-aliasing compiler|Fix strict-aliasing compiler
        description|warnings                    |warnings




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[Buildroot] [Bug 1339] Busybox needs -fno-strict-aliasing to compile cleanly

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1339


Thomas Petazzoni <thomas.petazzoni@free-electrons.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |2010.05




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[Buildroot] [Bug 1339] Busybox needs -fno-strict-aliasing to compile cleanly

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1339

--- Comment #1 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com>  ---
I'd rather say that this issue should be fixed at the Busybox level rather than
in Buildroot. Peter, your opinion ?

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[Buildroot] [Bug 1339] Busybox needs -fno-strict-aliasing to compile cleanly

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1339

--- Comment #2 from Peter Korsgaard <jacmet@uclibc.org>  ---
(In reply to comment #1)
> I'd rather say that this issue should be fixed at the Busybox level rather than
> in Buildroot. Peter, your opinion ?

Yes. And as they are just warnings and not errors it isn't a big problem.

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[Buildroot] [Bug 1339] Busybox needs -fno-strict-aliasing to compile cleanly

[bugzilla at busybox.net]

https://bugs.busybox.net/show_bug.cgi?id=1339

Thomas Petazzoni <thomas.petazzoni@free-electrons.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |INVALID

--- Comment #3 from Thomas Petazzoni <thomas.petazzoni@free-electrons.com>  ---
Therefore, marked as invalid.

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