Hello Kai, Thank you for your reply. The manual I am referring to is, http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc.pdf What manual are you using to find the description for -00 option? I would like to download it. Could you provide an URL please? regards, George --- Kai Ruottu <karuottu@xxxxxxxx> wrote: > Lin George wrote: > > What is the function of -00 option in gcc? I can > not > > find related descriptions from gcc manual. > > > What manual? My "Using the GNU Compiler Collection > (GCC)" > for gcc-3.4 describes this as : "Do not optimize. > This is the default." > > Is some of the newer gcc-4.x manuals missing this > or what? Some > of the earlier gcc-2.9, gcc-3.0-3.3 ones or maybe > the most uptodate > gcc-4.2 one? > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com