Greetings MacPorts users,
I am a fresh convert from Fink to MacPorts and am currently muddling my way
through a setup of numpy and various other scientific packages. I'm wondering
if someone could let me know why the gcc45 variant of atlas seems to be the
default install for the gcc44 variant of py26-numpy:
% port rdeps py26-numpy
The following ports are dependencies of py26-numpy @1.5.0_0+gcc44:
python26
gettext
libiconv
gperf
ncurses
ncursesw
expat
zlib
openssl
sqlite3
readline
db46
gdbm
bzip2
fftw-3
py26-nose
py26-distribute
atlas
gcc45
gmp
mpfr
libmpc
gzip
texinfo
lzmautils
gcc44
Since it seems there is a variant of atlas available for gcc44:
% port variants atlas
atlas has the variants:
gcc42: build using macports-gcc-4.2
* conflicts with gcc43 gcc44 universal
gcc43: build using macports-gcc-4.3
* conflicts with gcc42 gcc44 universal
gcc44: build using macports-gcc-4.4
* conflicts with gcc42 gcc43
[+]gcc45: build using macports-gcc-4.5
* conflicts with gcc42 gcc43 gcc44
universal: Build for multiple architectures
My guess is that this is because gcc45 is the default variant for atlas, while
gcc44 is the default for py26-numpy. Further, there is not a gcc45 variant
available for py26-numpy. More importantly, will the issue of having two copies
of gcc be avoided by first installing the gcc44 variant of atlas and then
installing py26-numpy or do I need to force an install and/or edit config
files? (The second option is no problem for me, I'm just not yet familiar with
how the config/build system works in MacPorts.)
I did search for this issue on the users mailing list and I suspect it's
related to this:
http://www.mail-archive.com/[email protected]/msg19958.html
I have a related newbie question is about the use of universal vs gcc4X builds.
Is there a rule of thumb as to which is preferable for someone installing a
large number of python and scientific packages? I guess my criteria for
"preferable" include ease of building packages and avoiding having multiple gcc
versions, if possible. I'm on an i5 MacBook Pro.
Thanks for your help.
Kindest regards,
Michelle Gill
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