YAFFS2 experimental support available

Gedare Bloom gedare at gwmail.gwu.edu
Sat Dec 4 18:29:12 UTC 2010

On Sat, Dec 4, 2010 at 11:51 AM, Joel Sherrill
<joel.sherrill at oarcorp.com> wrote:
> On 12/04/2010 01:54 AM, Sébastien Bourdeauducq wrote:
>> On Saturday 04 December 2010 04:38:02 Ralf Corsepius wrote:
>>> There are some questionable items in your wiki:
>>> - The zlib in RTEMS-4.11 is current (1.2.5).
>> Yes, true, though the version in my branch (which itself is becoming
>> outdated)
>> is 1.2.4. There was a problem with libpng 1.4.4 that didn't find zlib and
>> I
>> thought it was because of this "old" version of it (because recompiling
>> 1.2.5
>> fixed it). But in reality the problem stems from the "z_" prefix added to
>> each
>> function in the RTEMS zlib, which isn't there when recompiling the vanilla
>> zlib (and yes, I still want to remove it, as it is less painful than
>> fixing
>> libpng's auto*** scripts). I forgot to update the reason on the wiki,
>> thanks
>> for pointing this out.
> I think this is fixed in the rtems-graphics-toolkit version of libpng.
> If not, it is in the working tree on some computer I work on LOL.
>> Sebastian spoke on IRC about this problem already, and might fix libpng's
>> configure script. So hopefully the zlib recompilation won't be needed at
>> all.
>>> - Using CFLAGS=-O9 is not useful.
>> Doesn't that flag mean "turn whatever optimizations on", which, with the
>> current versions of GCC, is an alias for -O3?
> Historically, -Ox where x > 2 didn't make a difference.  I recall
> some discussion about -O3 might enable something else but
> am not 100% sure on that.
-O3 adds a couple extra things see

Generally, O3 bloats code size further than O2 for perhaps some more
performance gains.

>> S.
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