1) Create directory
First create yourself a directory under your home(!) (so it gets backup up) in which you want to create the executable.
I usually call mine:
~/gem/v_5.1.1/Abs/...
2) Populate directory
Go into the executable directory you created above.
a) Clone the Git repository you want
For example:
git clone ~winger/gem/v_5.1.1/Abs/UQAM_development_FLake_CLASS/gem
then change into 'gem' directory:
cd gem
b) Create working directories
So the object files, libraries and executables will not be under your home, create links for the directories 'build' and 'work'. Pick a place under which you want to keep the object files, libraries and executables, for example:
work_space=~/projects/def-professor/${USER}/GEM_WORK_DIR
Create the directories and the links:
mkdir -p ${work_space}/build
mkdir -p ${work_space}/work
ln -s ${work_space}/build
ln -s ${work_space}/work
3) Create the executables
a) Acquire compiler:
module add intel/2021.2.0 fftw-intel-2021
b) Set the variable 'abs_dir' to the name of your executable directory (needed under d))
abs_dir=$(pwd)
c) Change into 'build' directory:
cd build
d) Create make files and dependencies
cmake -DCOMPILER=intel -DCMAKE_VERBOSE_MAKEFILE=ON -DWORK_PREFIX=${abs_dir}/work ${abs_dir}/project
e) Compile and create executable
make work
You can add the key '-j4' to use 4 cores in parallel:
make -j4 work
3) Modify the source code
Once you set the environment the variables $gemdyn and $rpnphy will get set, pointing to the source code in the environment:
${gemdyn}/src/*/*
${rpnphy}/src/*/*
You can check there which routines you want to modify. Once you know which routine(s) you want to modify go back into your "executable directory". Then "check out" all the routines you want to modify with:
rde co subroutine.F90
or
rde co comdeck.cdk
You can also check out several routines at the same time.
Once you modified or copied the routines you want you need to compile them and then recreate the executable, following points b) 2) to 4) above.