Compile modules with with -fvisibility=hidden and expose only init function

Author: Wentzell

cmake/Cpp2PyConfig.cmake.in

@@ -87,6 +87,9 @@ macro(add_cpp2py_module)
   add_library(${module_name} MODULE ${wrap_name})
   target_link_libraries(${module_name} cpp2py::cpp2py)
 
+  # We expose only the modules init function in the dynamic symbol table
+  target_compile_options(${module_name} PRIVATE -fvisibility=hidden -fvisibility-inlines-hidden)
+
   set_target_properties(${module_name}
     PROPERTIES
     PREFIX ""  #eliminate the lib in front of the module name

cpp2py/CMakeLists.txt

@@ -50,6 +50,9 @@ macro(add_cpp2py_module)
   add_library(${module_name} MODULE ${wrap_name})
   target_link_libraries(${module_name} cpp2py)
 
+  # We expose only the modules init function in the dynamic symbol table
+  target_compile_options(${module_name} PRIVATE -fvisibility=hidden -fvisibility-inlines-hidden)
+
   set_target_properties(${module_name}
     PROPERTIES
     PREFIX ""  #eliminate the lib in front of the module name

cpp2py/mako/wrap.cxx

@@ -1077,7 +1077,7 @@ template <typename T> std::function<PyObject *(PyObject *, std::string)> make_py
 #endif
 
 //--------------------- module init function -----------------------------
-PyMODINIT_FUNC PyInit_${module.name}(void)
+extern "C" __attribute__((visibility("default"))) PyObject* PyInit_${module.name}(void)
 {
 
 #ifdef TRIQS_IMPORTED_CONVERTERS_ARRAYS