Use rules_cc instead of native cc_library rules.

Author: iphydf

BUILD.bazel

@@ -1,3 +1,4 @@
+load("@rules_cc//cc:defs.bzl", "cc_binary")
 load("//tools/project:build_defs.bzl", "project")
 
 project()

examples/BUILD.bazel

@@ -1,3 +1,5 @@
+load("@rules_python//python:defs.bzl", "py_binary")
+
 py_binary(
     name = "echo",
     srcs = ["echo.py"],

pytox/core.c

@@ -176,12 +176,14 @@ static void callback_file_recv_chunk(Tox *tox, uint32_t friend_number, uint32_t
 static void init_options(ToxCore* self, PyObject* pyopts, struct Tox_Options* tox_opts,
                          uint8_t **savedata_data, char **proxy_host)
 {
-    char *buf = NULL;
+    const char *buf = NULL;
     Py_ssize_t sz = 0;
     PyObject *p = NULL;
 
     p = PyObject_GetAttrString(pyopts, "savedata_data");
-    PyBytes_AsStringAndSize(p, &buf, &sz);
+    char *mbuf = NULL;
+    PyBytes_AsStringAndSize(p, &mbuf, &sz);
+    buf = mbuf;
     if (sz > 0) {
         *savedata_data = calloc(1, sz);
         memcpy(*savedata_data, buf, sz);

pytox/util.c

@@ -65,7 +65,7 @@ void hex_string_to_bytes(uint8_t* hexstr, int length, uint8_t* bytes)
   }
 }
 
-void PyStringUnicode_AsStringAndSize(PyObject* object, char** str,
+void PyStringUnicode_AsStringAndSize(PyObject* object, const char** str,
     Py_ssize_t* len)
 {
 #if PY_MAJOR_VERSION < 3

pytox/util.h

@@ -52,7 +52,7 @@ void bytes_to_hex_string(const uint8_t* digest, int length, uint8_t* hex_digest)
 
 void hex_string_to_bytes(uint8_t* hexstr, int length, uint8_t* bytes);
 
-void PyStringUnicode_AsStringAndSize(PyObject* object, char** str,
+void PyStringUnicode_AsStringAndSize(PyObject* object, const char** str,
     Py_ssize_t* len);
 
 #endif /* PYTOX_UTIL_H */

tests/BUILD.bazel

@@ -1,3 +1,5 @@
+load("@rules_python//python:defs.bzl", "py_test")
+
 py_test(
     name = "tests",
     srcs = ["tests.py"],