== Installing the gfortran compiler ==

gfortran 4.2.3 available on the site [http://r.research.att.com/tools/]


== Generating NETCDF modules and library ==
The following script is executed in the directory netcdf-3.6.1.
gcc-4.0 comes from the XCode (Mac OS X 10.5.8).
Flags avoid conflicts between C and Fortran during the library compilation.


{{{
#!/bin/sh

export FC=gfortran
export F90=gfortran
export F77=gfortran

export FFLAGS='-O3 -ff2c'
export F90FLAGS='-O3 -ff2c'

export CC=gcc-4.0
export CPPFLAGS='-Df2cFortran'

./configure --prefix=/usr/local/netcdf-3.6.1/gfortran

}}}

== Compiling NEMO ==
Compiler options in NEMO/build/config :
The debugging option has to be -dwarf-2 (and not -g). 
The optimizing option -O3 is ok too.


{{{
NETCDF_INCLUDE=/usr/local/netcdf-3.6.1/gfortran/include
NETCDF_LIB=-L/usr/local/netcdf-3.6.1/gfortran/lib -lnetcdf
CPP=cpp
CPPFLAGS=-traditional -P
AR=ar 
ARFLAGS=cvr
FC=gfortran
FCFLAGS=  -c -gdwarf-2 -fdefault-real-8 -ffree-line-length-none -I$(NETCDF_INCLUDE) -I$(NEMOLIB)
FCFLAGSF90=  -c -gdwarf-2  -fdefault-real-8 -ffree-line-length-none -I$(NETCDF_INCLUDE) -I$(NEMOLIB)
LDFLAGS=  -gdwarf-2  -free-line-length-none -o 

== Compiling NEMOVAR ==
Link with the lapack library is needed (conjgrad).


}}}