On Tue, 13 Mar 2012 22:44:03 P Purkayastha wrote:
On Wednesday, March 14, 2012 4:54:32 AM UTC+8, François wrote: On Tue, 13 Mar 2012 01:18:41 P Purkayastha wrote: > On Tuesday, March 13, 2012 3:41:35 PM UTC+8, Jeroen Demeyer wrote: > > If you do this, you certainly should not restrict yourself to the > > Graphite command line options, you should optimize gcc's flags in > > general (like adding -march for example). > > > > Jeroen. > > If you do set -march, then *-march=native* is a pretty safe option. gcc > picks up many optimization flags by itself after detecting the cpu. I have > used this option for more than 3 years now for my whole Gentoo linux setup. > > But (of course) binaries made from -march=native can not be distributed. -march=native only works on x86* other archs like ppc(64) are not supported. Francois Interesting. I didn't know this. It seems -march=native is not present on arm and -march is itself not available on ppc. Yep, good old -mcpu like in the good old days: frb15@p2n14-c /hpc/home/frb15 :gcc -v Using built-in specs. Target: powerpc64-suse-linux Configured with: ../configure --prefix=/usr --infodir=/usr/share/info -- mandir=/usr/share/man --libdir=/usr/lib64 --libexecdir=/usr/lib64 --enable- languages=c,c++,objc,fortran,obj-c++,java --enable-checking=release --with- gxx-include-dir=/usr/include/c++/4.3 --enable-ssp --disable-libssp --with- bugurl=http://bugs.opensuse.org/ --with-pkgversion='SUSE Linux' --disable- libgcj --disable-libmudflap --with-slibdir=/lib64 --with-system-zlib --enable- __cxa_atexit --enable-libstdcxx-allocator=new --disable-libstdcxx-pch -- enable-version-specific-runtime-libs --program-suffix=-4.3 --enable-linux- futex --without-system-libunwind --with-cpu=power4 --enable-secureplt --with- long-double-128 --build=powerpc64-suse-linux Thread model: posix gcc version 4.3.4 [gcc-4_3-branch revision 152973] (SUSE Linux) -- To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org
