Good instructions here, but too much klunking around….

On Lion, will need to download:

• GCC 4.2 to compile with – lion uses llvm so you need to compile 4.6 with 4.2
• the new GCC itself here ftp://ftp.gnu.org/gnu/gcc/gcc-4.6.1/select gcc-4.6.1.tar.gz
• a few infrastructure libraries from here (ftp://gcc.gnu.org/pub/gcc/infrastructure/) – get mpc-0.8.1.tar.gz and mpfr-2.4.2.tar.bz2
• GMP itself needs a more recent version 5.0.2 (one of the features is 64bit under darwin)
• from the above article comments, be sure to update all your configures to include ABI=64 something like:

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