What is the gcc option which reorders the variables' address?

[John Love-Jensen]

Hi Leo,

> Is this reordering provided by a gcc command?

Not all optimizations are independently toggle-able by -f switches.

Many optimizations are enabled wholesale / carte blanche by the -O1 or -O2
or -O3 switches.

Note:  to see which toggle-able -f switches are enabled, without
meticulously scouring the manual, use this technique:

echo '' | g++ -O2 -fverbose-asm -S -x c++ - -o - | grep '^;'

HTH,
--Eljay