[Ecolab-list] Installing EcoLab with UNURAN

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Hi everyone,

I was trying to install EcoLab with UNURAN and ran into some problems
(which I think is because I am using a newer version of UNURAN) and I
would like to describe here how I fixed them. I used very non-standard
installation directories so I am just going to go through the entire
installation procedure. This can serve as a guide for anyone who is new at
this and others can also point out how this could be done in an easier
way.

I am running EcoLab on a Dell Latitude D610, Pentium M 2.13Ghz system with
1GB RAM, running Fedora 8. I used the following versions of the softwares
required.
tcl-8.4.15-5.fc8
blt-2.4-19.fc8
gcc-4.1.2-33
EcoLab-4.D25
unuran-1.1.0
prng-3.0.2

Installation Procedure
-----------------------------
For simplicity, I am assuming everything is done as root.

1. Download PRNG 3.0.2 from http://statistik.wu-wien.ac.at/prng/download.html
   tar -xvzf prng-3.0.2.tar.gz
   cd prng-3.0.2
   ./configure --prefix=/opt/ecolab-4.D25/prng
   make all && make all install

2. Download UNURAN 1.1.0  from
http://statistik.wu-wien.ac.at/unuran/download.html
   tar -xvzf unuran-1.1.0.tar.gz
   cd unuran-1.1.0
   export LDFLAGS=-L/opt/ecolab-4.D25/prng/lib
   export CPPFLAGS=-I/opt/ecolab-4.D25/prng/include
   ./configure --prefix=/opt/ecolab-4.D25/unuran --with-urng-prng
   make all && make all install

3. Download EcoLab 4.D25 from http://ecolab.sourceforge.net
   tar -xvzf ecolab.4.D25.tar.gz
   cd ecolab.4.D25

   To let ecolab know where unuran and prng are located edit the
include/Makefile and in the block for UNURAN configuration starting
with ifdef UNURAN include the installed directories for unuran and prng
     vi include/Makefile
         change the FLAGS variable to FLAGS+=-DUNURAN
-I/opt/ecolab-4.D25/unuran/include
-I/opt/ecolab-4D25/prng/include
         change the LIBS variable to LIBS+=-L/opt/ecolab-4.D25/unuran/lib
-L/opt/ecolab-4.D25/prng/lib -lunuran -lprng

   The following I think is because I am using a newer version of UNURAN
than EcoLab 4.D25 was developed on. But you will have make two changes
in include/random_unuran.h otherwise the compilation will throw an
error complaining that prng* cannot be converted to UNUR_URNG*. After
going through the unuran documentation I found a method which actually
converts the prng* to UNUR_URNG*. So the changes to the
include/random_unuran.h file are as follows.

   vi include/random_unuran.h
   add #include <unuran_urng_prng.h> to the include statements

   change line 50 ( after adding the above include it is line 51) which is
originally
      unur_chg_urng(gen, uni.gen);    to
      unur_chg_urng(gen, unur_urng_prngptr_new(uni.gen));

   Now install Ecolab using the following command and everything should be
fine. After this I was able to open all the models without any errors

   make PREFIX=/opt/ecolab-4.D25 UNURAN=1 all install


Hope a guide on this lines is put up at the EcoLab website. It took me
almost an entire day to just get EcoLab installed and working.

Regards,
Srinivasa Shivakar Vulli (shivakar)