Date: Thu, 14 Apr 2011 09:52:17 +0200 From: "O. Hartmann" <ohartman@zedat.fu-berlin.de> To: bf1783@gmail.com Cc: "O. Hartmann" <ohartman@mail.zedat.fu-berlin.de>, brooks@freebsd.org, "b. f." <bf1783@googlemail.com>, freebsd-ports@freebsd.org Subject: Re: Does USE_GCC= 4.5+ also set C++ and Fortran to g++45/46 and gfortran45/46? Message-ID: <4DA6A7B1.2090805@zedat.fu-berlin.de> In-Reply-To: <BANLkTi=dPcgF5YAvEi3p_b=tECWA-MSMCw@mail.gmail.com> References: <BANLkTimPw=7_3bmtXzPKoyJ2w7ihaszLaQ@mail.gmail.com> <4DA68D86.3000102@mail.zedat.fu-berlin.de> <BANLkTi=dPcgF5YAvEi3p_b=tECWA-MSMCw@mail.gmail.com>
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On 04/14/11 08:32, b. f. wrote: > On 4/14/11, O. Hartmann<ohartman@mail.zedat.fu-berlin.de> wrote: >> On 04/13/11 20:59, b. f. wrote: > >> I looked into ports/Mk/bsd.gcc.mk and found that only gcc45 is set in >> case of using USE_FORTRAN, not gcc46. It would be nice also having gcc46 >> set, since we try to optimise for AVX in the new Intel Sandy-Bridge CPUs >> and gcc46 is supoorting new facilities like that. > > I think that the gcc maintainer will probably switch the default > Fortran compiler to gcc46 after gcc46 has been tested a bit longer, > and some of the remaining bugs fixed. You could of course switch the > default on your own machines. AVX support requires more than just a > new compiler and the proper hardware: at the moment, FreeBSD doesn't > support AVX, although some outside developers expressed an interest in > adding support for it: > > http://lists.freebsd.org/pipermail/freebsd-arch/2011-March/011167.html > > but this will probably take some time. > > b. Regarding the gcc46: I hope so. I read about the interest for AVX support in FreeBSd. But we try to optimize some code for numerical simulations to adopt SSE and, f available, AVX support by coding assembler or with the GNU compiler __attribute__ intrinsics. But this is also a bit of science-fiction for AVX for now. We had hope for clang, but clang lacks in many aspects we desperately need - like OpenMP support. Oliver
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