how to install erlang/otp on a fresh OS X Lion (system wide)

install OTP R14B03 for all users in OS X 10.7

# logged in as admin account
# xcode 4 already installed
# java already installed

# standard place to install on OS X
cd /usr/share

# I like to keep sources around when building 
# /etc/share/src doesn't exists, so just create it
sudo mkdir src
cd src

# didn't have wget installed so just curl it
sudo curl -o otp_src_R14B03.tar.gz http://erlang.org/download/otp_src_R14B03.tar.gz

# unzip/tar

tar zxvf otp_src_R14B03.tar.gz

# cd to toplevel src folder 
cd otp_src_R14B03

# configure make
# flag is apparently required for 10.7/xcode4 per internet lore
# standard install place is /usr/share/ 
# enable threads
# set sys arch
# (I used sudo for everything)

sudo CFLAGS=-O0 ./configure --prefix=/usr/share/erlang --enable-threads --enable-darwin-64bit

# make and install it
sudo make 
sudo make install

# check it -- you should get the erlang shell
/usr/share/erlang/bin/erl

# now set the system wide path

cd /etc/paths.d
sudo touch erlang
sudo vim erlang

# in vim add this line and save it
/usr/share/erlang/bin

# end.