== 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.

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

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


==== Compiling NETCDF-3.6.2 using gcc-4.3 ====
During NETCDF-3.6.2 make check process we have the following error message:

{{{
libtool: compile:  c++ -DHAVE_CONFIG_H -I. -I. -I.. -I../fortran -DDEBUG -I../libsrc -g -O2 -MT ncvalues.lo -MD -MP -MF
.deps/ncvalues.Tpo -c ncvalues.cpp -o ncvalues.o
ncvalues.cpp: In member function 'virtual char* NcValues_ncbyte::as_string(long int) const':
ncvalues.cpp:238: error: 'strncpy' was not declared in this scope
}}}

A temporary solution (awaiting for new release) may be found
here:
http://www.cyrius.com/journal/gcc/gcc-4.3-include.html

e.g: modify some cpp files by adding #include <cstring.h>

== Compiling NEMO ==
Debugging option: -gdwarf-2 (and not -g). 
The optimizing option -O3 is ok.

{{{
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).