Installation of MEML

It is recommended for an optimal speed to install MEML and all the software it depends on from source code. In particular an adapted ATLAS can distinctly speed up generated programs. So this webpage provides an installation instructions to compile all of the needed software on your system by a given bash-shell-script.

Installation from scratch with the bash-shell-script

First of all make sure that (gnu)make, gcc, g77 and f2c are installed.
Now get the software form SourceForge

http://sourceforge.net/projects/meml/

Unpack it and enter the directory

tar xzf meml-0.7.tar.gz tar xzf MEMLDEPS.tar.gz cd MEMLDEPS
Fit the software for your hardware and set e.g.

export MEMLOPT="-march=athlon-xp"
or
export MEMLOPT="-march=pentium4"
Let the Shell-script do the compiling

sh install.sh

You have got to follow the instructions of ATLAS like:

Enter number at top left of screen [0]: 054

From now on it should work in most cases to press ENTER all the time.
If not, have a look at troubleshooting or better the ATLAS Homepage.
After a while everything should be done and you can have a look at the examples in the documentation.
If you are root privileges you can install the software system wide by

su cp -r $HOME/local/include/* /usr/local/include cp -r $HOME/local/lib/* /usr/local/lib
Enter the meml directory

cd ../meml-0.7/
If you want to install MEML in your home directory gone on like this

./configure --prefix=$HOME/local/ CFLAGS="-Wall -W -O2 $CFLAGS $MEMLOPT -D__HAVE_UMFPACK -I$HOME/local/include/UMFPACK/" If you are root privileges you can install the software system wide by

./configure --prefix=/usr/local/ CFLAGS="-Wall -W -O2 $CFLAGS $MEMLOPT -D__HAVE_UMFPACK -I$HOME/local/include/UMFPACK/"
now independently of the last order type now

make make install
A program which uses MEML can e.g. be compiled in the following way:

gcc foo.c $LMEMLUMF -O2 -march=athlon-xp -o foo

troubleshooting

ATLAS is missing g77 on e.g. SUSE 10
There is a dummin package for g77 in SUSE 10 because the name of g77 has changed in this distribution
ATLAS 3.6 and gcc 4.0
If ATLAS reports something like this:
ATLAS has detected that you are running on an x86 architecture (eg., Athlon, P4, PIII, etc), but do not have a pre-2.96 gcc installed. Using gcc 3/2.96 will result in a performance loss of 10-20% ... In the meantime, we suggest you abondon this ATLAS install, and install a gcc that delivers decent x86 performance, and restart the install then. ... Stop ATLAS install? [y]: Just type n. gcc 4.x is OK but newer than the ATLAS compiler test.
ATLAS does not really know your CPU askes ...
Your architectural defaults do not include defaults for the Level 1 BLAS. ATLAS now has the ability to tune the Level 1 BLAS to your machine. However, this will add time to the install. ... Tune the Level 1 BLAS? [y]: Think about it. You will get a speed-up by saying yes but it may take hours to tune the Level 1 BLAS for your machine.