On 14:23 Thu 17 Jul , Adam Stylinski wrote: > The intel C Compiler (icc) has an ebuild for gentoo and the wiki has a > script to integrate it with portage. This script works will in terms > of building binaries, however when mixed with gcc environments there > are massive linking issues. I propose that an ICC profile is made > which contains specific versions and default flags for people who want > to build a mixed icc-gcc environment. ICC is much faster than GCC and > although not free, offers a free non-commercial license. I would be > very interested in this project and more than willing to help to the > best of my abilities. I've already been trying to maintain a mixed > environment with some luck, while there have been a lot of problems > using dynamically linked libraries (ld from intel and ld from gcc > don't always get along), my system is substatially faster. The kernel > obviously will still be built under gcc as well as bash (unless intel > helps submit patches to make the code work with their compiler). > There are many tools icc has to offer for vectorization. If these > were streamlined into Gentoo with a fetch restriction for ICC, a > bootsrapping boot disk could be made and result in a very fast > distribution. -- [email protected] mailing list
Adam,
I've already got a mixed system that works reasonably well. I use
/etc/portage/env/ to control which packages build with icc and
icc-specific CFLAGS by having /etc/portage/env/$CATEGORY/$PN be symlinks
to /etc/portage/env/env.icc with these contents:
echo " * Exporting: Intel compilers in $EBUILD_PHASE"
CC="icc"
CXX="icc"
FC="ifort"
F77="ifort"
FFLAGS="-openmp -parallel -ipo -xO -O2 -no-prec-div"
FCFLAGS="${FFLAGS}"
export CC CXX FC F77 FFLAGS FCFLAGS
Is what you're proposing here an improvement over something like the
above setup? If so, could you explain how?
--
Thanks,
Donnie
Donnie Berkholz
Developer, Gentoo Linux
Blog: http://dberkholz.wordpress.com
pgpRKtYUHvEJk.pgp
Description: PGP signature
