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Hi,

I want to call a function from a Python library inside a dissector (I know, not great but I'm just trying something out). To do this I'm using the Python/C api.

After adding the #include in the dissector I wanted to modify, Python.h was not found. This I solved by adding to the epan/dissectors/CMakeLists.txt file (around line 2194):

 target_include_directories(dissectors
        SYSTEM PRIVATE
+               ${Python3_INCLUDE_DIRS}

Now I get linker errors, so I tried adding a

+target_link_libraries(dissectors ${Python3_LIBRARIES})

under the target_include_directories (still in epan/dissectors/CMakeLists.txt).

That still didn't work, and I don't know how to get the linker to link the Python libraries correctly? I'm not very experienced with CMake and even less with Wireshark development.

This is the linker error I get:

...
[ 90%] Linking CXX executable run/wireshark
ld: run/libwireshark.so.0.0.0: undefined reference to `PyRun_SimpleStringFlags'
ld: run/libwireshark.so.0.0.0: undefined reference to `Py_FinalizeEx'
ld: run/libwireshark.so.0.0.0: undefined reference to `Py_Initialize'

Hi,

I want to call a function from a Python library inside a dissector (I know, not great but I'm just trying something out). To do this I'm using the Python/C api.

After adding the #include in the dissector I wanted to modify, Python.h was not found. This I solved by adding to the epan/dissectors/CMakeLists.txt file (around line 2194):

 target_include_directories(dissectors
        SYSTEM PRIVATE
+               ${Python3_INCLUDE_DIRS}

Now I get linker errors, so I tried adding a

+target_link_libraries(dissectors ${Python3_LIBRARIES})

under right after the target_include_directories (still in epan/dissectors/CMakeLists.txt).

That still didn't work, and I don't know how to get the linker to link the Python libraries correctly? I'm not very experienced with CMake and even less with Wireshark development.

This is the linker error I get:

...
[ 90%] Linking CXX executable run/wireshark
ld: run/libwireshark.so.0.0.0: undefined reference to `PyRun_SimpleStringFlags'
ld: run/libwireshark.so.0.0.0: undefined reference to `Py_FinalizeEx'
ld: run/libwireshark.so.0.0.0: undefined reference to `Py_Initialize'