thanks for your description, i finally found the doc: http://predef.sourceforge.net/prearch.html, it's a little hard. :)
On Mon, Jun 30, 2008 at 1:27 PM, Russ Allbery <[EMAIL PROTECTED]> wrote: > "Star Liu" <[EMAIL PROTECTED]> writes: > > > I read this line in a c source file: > > #if defined (__sun) && (defined(__i386) || defined(__amd64)) > > I'm wondering where are __sun __amd and 64 __i386 defined? > > They're defined by the compiler. There's a "standard" set of such defines > that the compiler sets up automatically (standard in the sense that every > time I need to figure out what they are, I have to go grovelling through > arcane compiler flags or obscure documentation). > > -- > Russ Allbery ([EMAIL PROTECTED]) > <http://www.eyrie.org/~eagle/<http://www.eyrie.org/%7Eeagle/> > > > > > -- > To UNSUBSCRIBE, email to [EMAIL PROTECTED] > with a subject of "unsubscribe". Trouble? Contact > [EMAIL PROTECTED] > > -- --------------------------------------------------------------------------------------------------------------------------------------------- Homepage: http://starliu.9966.org, about Buddha, x86_64 CPU, Debian GNU/Linux Lenny AMD64, UEFI/BIOS ---------------------------------------------------------------------------------------------------------------------------------------------
