the ffi_convenience library was once built and installed with oldish GCC versions. Either remove it completely from the search path, or search for  the standard libffi system library.

--- a/setup.py
+++ b/setup.py
@@ -1939,7 +1939,7 @@
                         break
         ffi_lib = None
         if ffi_inc is not None:
-            for lib_name in ('ffi_convenience', 'ffi_pic', 'ffi'):
+            for lib_name in ('ffi', 'ffi_convenience', 'ffi_pic', 'ffi'):
                 if (self.compiler.find_library_file(lib_dirs, lib_name)):
                     ffi_lib = lib_name
                     break