|Atlas of Lie Groups and Representations|
Compiling atlas for the Mac using gccThe main point is that you need a "true" gcc compiler, at least gcc 4.4. The versions supplied with Xcode (at least up to XCode 7.2.1) will not compile atlas (as explained here). But using the XCode compiler, there are many ways to get a true gcc compiler. If you are not able to follow our recommended MacPorts installation, you are on your own. We hear good things about Homebrew.
We will retain here old instructions based on Compiling gcc 4.6.2 on Mac OSX Lion.
The idea is to install gcc (not llvm-gcc, see mac C compilers) in a custom directory, safely away from all XCode and other C libraries.
(1) Create a directory my-gcc in your home directory username/my-gcc.
(2) Install the XCode C compiler. If you already have XCode installed, go to step (3) (XCode is not installed by default).
The XCode package is huge, and includes a lot of unnecessary tools. We recommend downloading and installing just the XCode command line tools, which have everything you need. Alternatively install the entire Xcode package. In either case you will need a (free) Apple ID.
Once you have installed XCode, or just the command line tools, you will have a C compiler /usr/bin/gcc
(3) install gmp from gmplib.org Double click on gmp-5.0.2.tar.bz2, to extract the library into your Downloads folder. Open a terminal window, and do the following:
If all goes well this will install the gmp libraries in your my-gcc directory.
(4) Follow similar steps to install mpfr from www.mpfr.org
(5) Follow similar steps to install mpc from www.multiprecision.org
(6) Follow similar steps to install gcc from ftp.gnu.org. This takes a long time.
(7) Follow similar steps to install readline
(there is a bug that prevents dynamic linking)
(8) Give the command
to add my-gcc to your path environment variable.
(9) Edit the atlas makefile to read:
#the default compiler
Proceed to Step (6) in the MacPorts installation process.