Compilation and Installation

Procedure

Use PuTTY to log in to the server as the root user.
Go to the NEMO installation directory.
```
cd /path/to/NEMO
```

Set the NEMO environment variables.

echo "export NETCDF_DIR=/path/to/NETCDF" >> nemo-env.sh
echo "export HDF_DIR=/path/to/HDF5" >> nemo-env.sh
echo "export XIOS_DIR=/path/to/XIOS/xios-1.0" >> nemo-env.sh
source nemo-env.sh

Decompress the installation package.

unzip NEMO_releases_release-3.6-15515.zip

Go to the NEMO source code directory.
```
cd NEMO/releases/release-3.6/NEMOGCM
```

Create an arch-aarch64_gnu.fcm file.

Create an arch-aarch64_gnu.fcm file.
```
vi ARCH/arch-aarch64_gnu.fcm
```

Press i to enter the edit mode and add the following content:

#generic gfortran compiler options for linux
#NCDF_INC    netcdf include file
#NCDF_LIB    netcdf library
#FC          Fortran compiler command
#FCFLAGS     Fortran compiler flags
#FFLAGS      Fortran 77 compiler flags
#LD          linker
#LDFLAGS     linker flags, e.g. -L<lib dir> if you have libraries in a
#FPPFLAGS    pre-processing flags
#AR          assembler
#ARFLAGS     assembler flags
#MK          make
#USER_INC    additional include files for the compiler,  e.g. -I<include dir>
#USER_LIB    additional libraries to pass to the linker, e.g. -l<library>
#CC          C compiler used to compile conv for AGRIF
#CFLAGS      compiler flags used with CC
#
#Note that:
# - unix variables "$..." are accpeted and will be evaluated before calling fcm.
# - fcm variables are starting with a % (and not a $)
%NCDF_HOME           $NETCDF_DIR
%HDF5_HOME           $HDF_DIR
%XIOS_HOME           $XIOS_DIR
%NCDF_INC            -I%NCDF_HOME/include -I%HDF5_HOME/include
%NCDF_LIB            -L%HDF5_HOME/lib -L/%NCDF_HOME/lib -lnetcdf -lnetcdff
%XIOS_INC            -I%XIOS_HOME/inc
%XIOS_LIB            -L%XIOS_HOME/lib -lxios
%CPP                 cpp
%FC                  mpifort
%FCFLAGS             -cpp -r8 -O3 -mcpu=native
%FFLAGS              %FCFLAGS
%LD                  mpif90
%LDFLAGS             -lstdc++
%FPPFLAGS            -P -C -traditional
%AR                  ar
%ARFLAGS             rs
%MK                  gmake
%USER_INC            %XIOS_INC %NCDF_INC
%USER_LIB            %XIOS_LIB %NCDF_LIB
%CC                  clang
%CFLAGS              -O0

Press Esc, type :wq!, and press Enter to save the file and exit.

Compile and install the software.

chmod 777 ./ -R
cd ./CONFIG/
./makenemo -m aarch64_gnu -j 32 -r AMM12 -n 'MY_AMM12' add_key "key_nosignedzero"

Parent topic: NEMO 3.6 Porting Guide (openEuler 21.03)