> On 07 Jun 2015, at 18:35, Tobias Pape <Das.Linux at gmx.de> wrote: > > > -O0 no opt > -O1 'Optimize' (= -O) > -O2 'Optimize even more' > -O3 'Optimize yet more' > -Os 'Optimize for size' (like -O2 minus size-increasing opts) > -Ofast 'Disregard strict standards compliance’ -Og ‘Optimize for debugging’ combined with -ggdb3