[devel] -D_FORTIFY_SOURCE=2

[Alexey Tourbin]

On Thu, Aug 12, 2010 at 02:02:17PM +0400, Sergey V Turchin wrote:
> man gcc про -O2
> "NOTE: In ALT Linux gcc 4.1.1-alt9 and later versions, -D_FORTIFY_SOURCE=2 is 
> set by default, and is activated when -O is set to 2 or higher.

BTW, I find this incomprehensible.  Is it really enabled by default,
or is it only enabled with -O2 and higher?  Leaving aside the fact of
me being curious about whether -Os is higher than -O2...

I felt like fortification and optimization are really different
compiler features.  To me, it's unclear why -O2 should trigger
fortification.