How to run modified C++ files

[Panji Brotoisworo]

Hi,

I am learning how RSGISLib works and I see that it has a lot of intergration with C++ files. Is there a way to edit the C++ files and compile them so it can run the modified C++ code? I'm mainly going to be adding a lot of stdout so I can see the values.

I installed RSGISLib using conda. Is it possible to just edit the TAR file contents with the modified C++ code then perform an offline installation?

Thanks

[Peter Bunting]

Hi Panji,

I have a docker image setup for this purpose:

https://github.com/remotesensinginfo/docker_builds/blob/master/rsinfo_rsgislib_build/Dockerfile

However, you can also do locally installing a new conda environment:

# Minimum Install
conda install --yes -c au-eoed -c conda-forge python=3.9 gdal geos gsl kealib xerces-c muparser boost-cpp rios

# With more python dependencies
conda install --yes -c au-eoed -c conda-forge python=3.9 gdal geos gsl kealib xerces-c muparser boost-cpp rios scikit-learn scikit-image scikit-optimize imbalanced-learn scikit-plot scikit-fuzzy bayesian-optimization matplotlib pandas geopandas statsmodels h5py scipy shapely networkx sqlalchemy pycurl xgboost lightgbm seaborn numba pip sphinx rtree tqdm jinja2 keras parallel pygal jupyterlab psutil pysal libpysal esda; sync \


# You’d need to update this path for your conda environment
export CONDA_ENV_PATH=/Users/pete/.conda/envs/rsgislib_v5_dev

# You’d need to update the install path
cmake -D CMAKE_INSTALL_PREFIX=/Users/pete/Temp/rsgislib_v5_dev_install \
-D BOOST_INCLUDE_DIR=$CONDA_ENV_PATH/include \
-D BOOST_LIB_PATH=$CONDA_ENV_PATH/lib \
-D GDAL_INCLUDE_DIR=$CONDA_ENV_PATH/include \
-D GDAL_LIB_PATH=$CONDA_ENV_PATH/lib \
-D HDF5_INCLUDE_DIR=$CONDA_ENV_PATH/include \
-D HDF5_LIB_PATH=$CONDA_ENV_PATH/lib \
-D GSL_INCLUDE_DIR=$CONDA_ENV_PATH/include \
-D GSL_LIB_PATH=$CONDA_ENV_PATH/lib \
-D MUPARSER_INCLUDE_DIR=$CONDA_ENV_PATH/include \
-D MUPARSER_LIB_PATH=$CONDA_ENV_PATH/lib \
-D KEA_INCLUDE_DIR=$CONDA_ENV_PATH/include \
-D KEA_LIB_PATH=$CONDA_ENV_PATH/lib \
-D Python_EXECUTABLE=$CONDA_ENV_PATH/bin/python \
-D Python_INCLUDE_DIR=$CONDA_ENV_PATH/include/python3.9/ \
-D Python_LIBRARY_RELEASE=$CONDA_ENV_PATH/lib/libpython3.9.dylib \
-D CMAKE_VERBOSE_MAKEFILE=ON \
-D CMAKE_BUILD_TYPE=Debug \
-D CMAKE_SKIP_RPATH=ON \
..

To run things you’d need to point python etc. at your local install by exporting the following paths:

export LD_LIBRARY_PATH=/Users/pete/Temp/rsgislib_v5_dev_install/lib:$LD_LIBRARY_PATH
export PYTHONPATH=/Users/pete/Temp/rsgislib_v5_dev_install/lib/python3.9/site-packages:$PYTHONPATH
export PATH=/Users/pete/Temp/rsgislib_v5_dev_install/bin:$PATH

Hope that helps.

Best wishes,

Pete

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[Panji Brotoisworo]

Thanks Peter.

Just one clarification regarding installing a new local envirobment because my experience is mainly with Python.

If I want to edit the C++ files. Where would I save and compile the files to so that RSGISLib will load them?

[Peter Bunting]

Hi Panji,

It you don’t have much experience with C++ you might find it quite hard to get into that side of RSGISLib. However, if you edit any of the C++ files you will need to recompile rsgislib and then install it. So once you have run cmake (command below in original email) then you need to run:

# to compile the c++ code the -j switch allow multiple cores to be used for the build, in this case 4.
make -j 4

# install the new rsgislib version (includes all the pure python parts of rsgislib as well)
make install

Depending on where you install it to, as I said in the last email, you might then need to export paths etc. to access the version of rsgislib you have just installed.

Best wishes,

Pete

[Panji Brotoisworo]

Hi Peter,

Thanks for the detailed response. I will update if I need additional info.

Thanks,

Panji