if I just include this patch, some modules don't build:

(...)

gcc -pthread -fPIC -Wno-unused-result -Wsign-compare -Wunreachable-code -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -Werror=declaration-after-statement -Ibuild/temp.linux-x86_64-3.5/libffi/include -Ibuild/temp.linux-x86_64-3.5/libffi -I/home/alex/Python-3.5.0/Modules/_ctypes/libffi/src -I./Include -I/home/alex/Python/include -I. -IInclude -I/usr/local/include -I/home/alex/Python-3.5.0/Include -I/home/alex/Python-3.5.0 -c /home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c -o build/temp.linux-x86_64-3.5/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.o -Wall -fexceptions
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c: In function ‘PyCSimpleType_from_param’:
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2062:15: error: ‘_PyThreadState_Current’ undeclared (first use in this function)
         if (Py_EnterRecursiveCall("while processing _as_parameter_")) {
               ^
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2062:15: note: each undeclared identifier is reported only once for each function it appears in
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2062:28: error: ‘__atomic_load_ptr’ undeclared (first use in this function)
         if (Py_EnterRecursiveCall("while processing _as_parameter_")) {
                            ^
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2062:66: error: argument 1 of ‘__atomic_load’ must be a non-void pointer type
         if (Py_EnterRecursiveCall("while processing _as_parameter_")) {
                                                                  ^
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2062:19: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
         if (Py_EnterRecursiveCall("while processing _as_parameter_")) {
                   ^
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2067:62: error: argument 1 of ‘__atomic_load’ must be a non-void pointer type
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2067:21: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
         Py_LeaveRecursiveCall();
                     ^
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2067:62: error: argument 1 of ‘__atomic_load’ must be a non-void pointer type
/home/alex/Python-3.5.0/Modules/_ctypes/_ctypes.c:2067:139: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]

Failed to build these modules:
_ctypes               _decimal              _json              
_pickle