Help with package a library with python bindings

[Christophe Trophime <christophe.trophime@lncmi.cnrs.fr>]

Hi,
I'm trying to package a library freesteam.
I'm moving their build system from scons to cmake to be able to build python bindings

for both python and python3.

I've managed to get cmake working

but I have trouble with swig generated python bindings.
More precisely:

dpkg-shlibdeps: warning: debian/python-freesteam/usr/lib/python2.7/dist-packages/_freesteam.x86_64-linux-gnu.so contains an unresolvable reference to symbol _Z19freesteam_region_pudd: it's probably a plugin

the missing symbols are actually in the libfreesteam.so  library build at the same time.
What shall I do to get _freesteal..so to get the symbols from plain libfreesteam.so?

Best

C

PS:

The CMakeLists.txt for the python bindings looks like this:

cmake_policy(SET CMP0078 OLD)

find_package(SWIG )

if (SWIG_FOUND)

  INCLUDE(${SWIG_USE_FILE})

  

  include_directories(${PYTHON_INCLUDE_DIRS})

  

  set(PYFREESTEAM_INSTALL_DIR ${CMAKE_INSTALL_PREFIX}/lib/python${PYTHON_VERSION_MAJOR}.${PYTHON_VERSION_MINOR}/dist-packages/)

  set (UseSWIG_TARGET_NAME_PREFERENCE LEGACY)

  set_property(SOURCE freesteam.i PROPERTY CPLUSPLUS ON)

  swig_add_library(freesteam TYPE SHARED LANGUAGE python SOURCES freesteam.i)

  swig_link_libraries(freesteam ${PYTHON_LIBRARIES} freesteam)

  install(TARGETS ${SWIG_MODULE_freesteam_REAL_NAME} DESTINATION ${PYFREESTEAM_INSTALL_DIR})

  install(FILES ${CMAKE_BINARY_DIR}/python/freesteam.py DESTINATION ${PYFREESTEAM_INSTALL_DIR})

endif()

and the debian/rules:

override_dh_auto_configure:

dh_auto_configure -Bbuild.python3 -- $(extra_flags) -DFREESTEAM_PYTHON_VERSION=3

dh_auto_configure -Bbuild.python2 -- $(extra_flags) -DFREESTEAM_PYTHON_VERSION=2.7

override_dh_auto_build:

dh_auto_build -Bbuild.python3

dh_auto_build -Bbuild.python2

override_dh_auto_install:

dh_auto_install -Bbuild.python3

dh_auto_install -Bbuild.python2

ldd debian/tmp/usr/lib/python*/dist-packages/_freesteam*.so

override_dh_auto_test:

dh_auto_test -Bbuild.python3

cd build.python3 && ./test

dh_auto_test -Bbuild.python2

cd build.python2 && ./test

override_dh_shlibdeps:

dh_makeshlibs

dh_shlibdeps -v

and d/control:

Source: freesteam

Section: contrib/science

Priority: extra

Maintainer: John Pye <john@curioussymbols.com>

Build-Depends: debhelper (>= 9), cmake, gcc (>= 4.3), swig, 

 libgsl-dev (>= 2.3+dfsg-1~),

 dh-python,

 python3-all-dev (>= 3.5~), 

 python-all-dev (>= 2.6.6-3~)

X-Python-Version: current

X-Python3-Version: >= 3.2

Standards-Version: 3.7.2

...

Package: python-freesteam

Architecture: any

Section: python

Depends: libfreesteam-dev (= ${binary:Version}), ${python:Depends}

Description:Steam properties calculation library (Python bindings)

...

Christophe TROPHIME
Research Engineer

    CNRS - LNCMI
25, rue des Martyrs
BP 166
38042 GRENOBLE Cedex 9
FRANCE    

Tel : +33 (0)4 76 88 90 02
Fax : +33 (0) 4 76 88 10 01
Office U 19
M@il : christophe.trophime@lncmi.cnrs.fr