Adding python.h library

[avinashkshirsagar]

While compiling code using g++, one needs to specify the library as -lpython3.6m. When I was trying to build a submission package, I got errors of undefined reference to python header files, a solution to it is to add -lpython3.6m option. Where shall I make changes to solve this issue? I want to submit our code for FVT 1:1.

[mlngan]

You will need link any external dependencies directly to your core submission library. The only library that NIST will link against is your core submission library (i.e. libfrvt11_xxx_xxx.so). Additionally, you will need to provide all Python dependencies in your submission package to us.

[avinashkshirsagar]

Could you please guide me to link the dependencies to my core submission library?

[avinashkshirsagar]

Looking for core implementation library in /home/akshirsagar/frvt-biocube/11/lib.[SUCCESS] Found core implementation library /home/akshirsagar/frvt-biocube/11/lib/libfrvt_11_biocube_001.so.
Attempting to compile and link /home/akshirsagar/frvt-biocube/11/lib/libfrvt_11_biocube_001.so against test harness.
Scanning dependencies of target validate11
[ 50%] Building CXX object src/testdriver/CMakeFiles/validate11.dir/home/akshirsagar/frvt-biocube/common/src/util/util.cpp.o
[100%] Building CXX object src/testdriver/CMakeFiles/validate11.dir/validate11.cpp.o
Linking CXX executable ../../../bin/validate11
../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyImport_Import' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyList_GetItem'
../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyUnicode_DecodeFSDefault' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to PySys_SetPath'
../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyFloat_FromDouble' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to Py_FinalizeEx'
../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyList_Size' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyObject_CallObject'
../../../lib/libfrvt_11_biocube_001.so: undefined reference to Py_Initialize' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyFloat_AsDouble'
../../../lib/libfrvt_11_biocube_001.so: undefined reference to Py_BuildValue' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyObject_GetAttrString'
../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyLong_FromLong' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyList_SetItem'
../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyList_New' ../../../lib/libfrvt_11_biocube_001.so: undefined reference to PyCallable_Check'
collect2: error: ld returned 1 exit status
make[2]: *** [../bin/validate11] Error 1
make[1]: *** [src/testdriver/CMakeFiles/validate11.dir/all] Error 2
make: *** [all] Error 2
[ERROR] There were errors during compilation of your library with the validation test harness. Please investigate and re-compile.

I am getting this error, I have tried find_package(Python3 COMPONENTS Interpreter Development) from 11/CmakeLists.txt but still I am getting this error. Where shall I link the Python library to my submission library?

[mlngan]

You can't assume that python3 will be installed on our systems, because it is not. You will need to place all of your python dependencies (e.g., libpython3.6m.so) into your ./lib folder and link against them when you build YOUR shared library. You can use rpath=$ORIGIN, but you need to link your submission library against any 3rd party libraries that are required. For example, in your CMakeLists.txt:

set (CMAKE_SHARED_LINKER_FLAGS "-Wl,-rpath,$ORIGIN")
add_library (libfrvt_11_biocube_001 SHARED yourSourceCode.cpp)
target_link_libraries(libfrvt_11_biocube_001 libpython3.6m.so thirdpartylib1.so thirdpartylib2.so thirdpartylib3.so)