Linux: Ensure that the python embedded in the kitty binary build always uses UTF-8 mode

Fixes #924

docs/changelog.rst

@@ -12,6 +12,9 @@ Changelog
 - Add a new ``neighboring_window`` function to switch to neighboring
   windows in the current layout, similar to window movement in vim (:iss:`916`)
 
+- Linux: Ensure that the python embedded in the kitty binary build always uses
+  UTF-8 mode (:iss:`924`)
+
 
 0.12.1 [2018-09-08]
 ------------------------------

linux-launcher.c

@@ -153,6 +153,10 @@ int main(int argc, char *argv[]) {
         final_argv[i+1] = argv[i];
         num_args++;
     }
+#if PY_VERSION_HEX >= 0x03070000
+    // Always use UTF-8 mode, see https://github.com/kovidgoyal/kitty/issues/924
+    Py_UTF8Mode = 1;
+#endif
     for (i = 0; i < num_args; i++) {
         argvw[i] = Py_DecodeLocale(final_argv[i], NULL);
         if (argvw[i] == NULL) {