On Fri, Aug 20, 2004 at 07:06:06PM +0100, Dave Love wrote: > Paul Brossier <[EMAIL PROTECTED]> writes: > > > well, steve's patch only added `--build $(DEB_HOST_GNU_TYPE)' to the > > configure flags. maybe this gets somehow wrong on sparc. > > The gcc flags are inconsistent between sparc and x86 (and former gcc > maintainers can forget which way round they are...). -mcpu on sparc > selects the instruction/register set, not just the tuning as it does > on x86.
Not quite true, I believe. IIRC, i486 -> pentiumpro incurs some instructions being used in addition to normal x86 instructions. > For sparc, -mtune=ultrasparc would be reasonable, on the basis that > number crunching normally should be tuned for recent machines. On the > other hand, if it can be made to go significantly faster on ultras by > compiling with -mcpu=ultrasparc, it would be worth making multiple > library versions like openssl does. Similar to how -mcpu=i686 does not run on i386 machines, so -mcpu=ultrasparc wont run on pre-ultrasparc machines. It's a given. I can't see how this is confusing. -- Debian - http://www.debian.org/ Linux 1394 - http://www.linux1394.org/ Subversion - http://subversion.tigris.org/ WatchGuard - http://www.watchguard.com/
