> -----Original Message----- > From: [EMAIL PROTECTED] On Behalf Of Brian Dessent > Sent: Thursday, June 28, 2007 3:42 PM > To: cygwin@cygwin.com > Subject: Re: possible compiler optimization error > > > But both of these are too new to be in Cygwin's gcc 3.4.x so this is > kind of off-topic. > > Brian >
To bring things back on topic. The programs I am porting from Solaris to Linux and Windows need to run on a variety of hardware. Without using -march and creating different libraries and binaries for each piece of hardware, what would a good set of compiler options be? You said that combining -march=i686 and -msse2 didn't make too much sense. So without setting -march, what all should I be setting? On my laptop with CPU-Z I see MMX, SSE, and SSE2. On my Opteron Linux box I obviously see a lot more when I cat /proc/cpuinfo. If I just use what is common between them, -mmmx, -msse, and -msse2 I should be free of floating point errors and hopefully get some performance increase. Should I be using -mmmx if I'm also using -msse and -msse2? I am comfortable locking out users without sse and sse2 since most of our users are using computers that are no more than 2 or 3 years old. Again, thanks a lot for your help. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
