gmp is part of macports, so it's as easy as "port install gmp" here.
If you want to put it into petsc's build system, looking at the macports portfile / patches will probably reveal what's necessary to "port" it. --Kai On Fri, Jan 8, 2010 at 9:56 PM, Barry Smith <bsmith at mcs.anl.gov> wrote: > > I'm giving up on this for now. Building BlasLapack from the f or f2c > source code of BlasLapack with qd is hopeless. So one could use mpack, but > mpack requires gmp to build, but I am unable to build gmp on my Mac because > it is not as portable as it is suppose to be. > > There is a config/PETSc/packages/qd.py gmp.py and mpack.py if anyone > wants to see if they can get the pieces built. Note: you will need to get > the tarballs yourself, they are not on the website. If you hack MPACK to get > things running then please do it in an hg repository. You might be able to > hack mpack so it does not need gmp to build but ..... > > Cool idea but I am so pissed at bullshit non-portable code that pretends > to be portable I'm giving up! > > > Barry > > > On Nov 4, 2009, at 2:27 PM, Matthew Knepley wrote: > > On Wed, Nov 4, 2009 at 2:21 PM, Jed Brown <jed at 59a2.org> wrote: >> Matthew Knepley wrote: >> > On Wed, Nov 4, 2009 at 2:06 PM, Barry Smith <bsmith at mcs.anl.gov >> > <mailto:bsmith at mcs.anl.gov>> wrote: >> > >> > >> > This is tricky because some C/C++ compilers long double uses 128 >> > bits of space but actually (on Intel) only uses 80 of the bits >> > (those are the bits that floating point unit handles). So you do not >> > really get 128 bits. Also MPI may not properly handle the 128 bit >> > doubles. >> > >> > >> > I figured that his types were just C++ types once he said they were >> > provided by a package. >> >> QD is honest quad-double (32 bytes, all of them significant) >> >> http://crd.lbl.gov/~dhbailey/mpdist/<http://crd.lbl.gov/%7Edhbailey/mpdist/> >> >> They are C++ types with appropriate overloading, but the operations are >> implemented in terms of conventional double-precision where as "long >> double" is a different beast. >> >> Okay, then this should be no harder than complex. >> >> > I am investigating qd now. Is there any MPI implementation that >> > uses qd? Do you need MPI? >> > >> > >> > Can't we just make a type the correct number of bytes long? >> >> I think so (on homogeneous hardware), but you have to create your own >> version of each MPI_Op that does the right thing with this longer type. >> >> Yep, we do that now for several things in PETSc. >> >> Matt >> >> Jed >> >> >> >> >> -- >> What most experimenters take for granted before they begin their >> experiments is infinitely more interesting than any results to which their >> experiments lead. >> -- Norbert Wiener >> > > -- Kai Germaschewski Assistant Professor, Dept of Physics / Space Science Center University of New Hampshire, Durham, NH 03824 office: Morse Hall 245F phone: +1-603-862-2912 fax: +1-603-862-2771 -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-dev/attachments/20100108/810018f8/attachment.html>
