Fix sofapython3 tests linking w/ python.

Author: olivier-roussel

Plugin/CMakeLists.txt

@@ -36,6 +36,11 @@ target_compile_definitions(${PROJECT_NAME} PRIVATE "-DSOFA_BUILD_SOFAPYTHON3")
 
 target_link_libraries(${PROJECT_NAME} PUBLIC Sofa.Simulation.Graph)
 
+# The public linking with pybind lead to have a link with libpython which
+# propagates in the python module .so. On macOS, this extra link with libpython
+# lead to segv when importing the python module in versions of python that don't
+# have a dynamic link with libpython (such as the one provided by conda), but works
+# fine with versions that have such link.
 if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
   target_link_libraries(${PROJECT_NAME} PRIVATE pybind11::embed)
 else()

Testing/CMakeLists.txt

@@ -16,6 +16,11 @@ set(SOURCE_FILES
 
 add_library(${PROJECT_NAME} SHARED ${HEADER_FILES} ${SOURCE_FILES})
 target_link_libraries(${PROJECT_NAME} PUBLIC Sofa.Testing SofaPython3::Plugin)
+# We wan't the pybind11 dependency to propagate to SofaPython3Testing consumers,
+# here Bindings.*.Tests
+if(CMAKE_SYSTEM_NAME STREQUAL Darwin)
+  target_link_libraries(${PROJECT_NAME} PUBLIC pybind11::embed)
+endif()
 target_compile_definitions(${PROJECT_NAME} PRIVATE "-DSOFA_BUILD_SOFAPYTHON3")
 set_target_properties(${PROJECT_NAME} PROPERTIES FOLDER Testing)