How to adapt ARPACK for compilation with FreeFem++

NOTE: Since "./configure" is able to download ARPACK and compile it by itself, this file is only for reference.

1) download the arpack software in directory ../arpack

under Debian linux , the arpark tool are precompile package, you can use apt-get or dselect command to get the two package arpack library and arpack++, and after ser HOSTTYPE=Debian.

Otherwise

if the curl command is present do:
$ make get-arpack
or user you favorit brower and get the three file in the arpack dir

         http://www.caam.rice.edu/software/ARPACK/SRC/arpack96.tar.gz 
         http://www.caam.rice.edu/software/ARPACK/SRC/patch.tar.gz 
         http://www.caam.rice.edu/software/ARPACK/ARPACK++/arpack++.tar.gz

uncompress files with
go in the arpack dir and done unbder shell command: $ gunzip -c arpack96.tar.gz | tar xvf - $ gunzip -c patch.tar.gz | tar xvf -
$ gunzip -c arpack++.tar.gz| tar xvf -

2) compile the fortran ARPACK library

cd ARPACK
edit ARmake.inc file
change the flowing line for a linux computer 28c28
< home = $(HOME)/arpack/ARPACK
---
> home = $(HOME)/ARPACK
35c35
< PLAT = linux
---
> PLAT = SUN4
104,105c104,105

< FC      = g77
< FFLAGS        = -O 
---
> FC      = f77
> FFLAGS        = -O -cg89

115c115
< MAKE = /usr/bin/make
---
> MAKE = /bin/make

3) try to complie FreeFem++

edite the file src/Makefile-$HOSTTYPE:

set the 4 variables on linux:
EIGEN= eigenvalue.o # to compile the target eigenvalue.o LIBARPACK= -L../../arpack/ARPACK -larpack_linux -llapack -lblas LIBF77= -lg2c
INCARPACKPP = -DEIGENVALUE -I../../arpack/arpack++/include

go in freefem++ directory.

$ make all-g HOSTTYPE=$HOSTTYPE

g++ -c -g -DDRAWING -DBAMG_LONG_LONG -DCHECK_KN -I/usr/X11R6/include -I/home/hecht/FreeFem++v1.28/src -I/home/hecht/FreeFem++v1.28/src/femlib -I/home/hecht/FreeFem++v1.28/src/bamglib -I/home/hecht/FreeFem++v1.28/src/Graphics -I/home/hecht/FreeFem++v1.28/src/mpi -I/home/hecht/FreeFem++v1.28/src/Algo -DEIGENVALUE -I../../arpack/arpack++/include /home/hecht/FreeFem++v1.28/src/Eigen/eigenvalue.cpp In file included from ../../arpack/arpack++/include/lapackc.h:17,

from /home/hecht/FreeFem++v1.28/src/Eigen/eigenvalue.cpp:7: ../../arpack/arpack++/include/arch.h:54: generic.h: No such file or directory

if the file generic.h does not exist and if the fortran compile add _ to fonction name
the result of the following command is
$ nm /home/hecht/arpack/ARPACK/libarpack_linux.a|grep zstatn_

U zstatn_
00000000 T zstatn_

change in file arpack++/include/arch.h 54,55c54,56
< #include <generic.h>
< define F77NAME(x) name2(x,_)
---
> //include <generic.h>
> //#define F77NAME(x) name2(x,_)
> #define F77NAME(x) x ## _

change in file arpack++/include/arerror.h 33,34c33,34
< #include <iostream.h>
< #include <stdlib.h>
---
> #include <iostream>
> #include <cstdlib>

if the result is
$ nm /home/hecht/arpack/ARPACK/libarpack_linux.a|grep zstatn_

U zstatn
00000000 T zstatn

change in file arpack++/include/arch.h 54,55c54,56
< #include <generic.h>
< define F77NAME(x) name2(x,_)
---
> //include <generic.h>
> //#define F77NAME(x) name2(x,_)
> #define F77NAME(x) x

My three modifications in arpack++ files are:

diff -r arpack++/include/arch.h /Users/hecht/work/FreeFem++/arpack/arpack++/include/arch.h 54,55c54,56
< #include <generic.h>
< define F77NAME(x) name2(x,_)
---
> //include <generic.h>
> #define F77NAME(x) x ## _
> //name2(x,_)

diff -r arpack++/include/arcomp.h /Users/hecht/work/FreeFem++/arpack/arpack++/include/arcomp.h 20,22c20,22
< #include <complex.h>
<
< #ifdef __GNUG__
---
> #include <complex>
> using namespace std;
> #if defined(__GNUG__)|| defined(__MWERKS__)

diff -r arpack++/include/arrseig.h /Users/hecht/work/FreeFem++/arpack/arpack++/include/arrseig.h 1157c1157
< Eigenvectors(TYPE* &EigVecp, bool ischur = false) ---
> Eigenvectors(TYPE* &EigVecp, bool ischur )

4) retry of compile FreeFem++

Good Luck.