ocamlc: unknown option `-safe-string'.

[zzfzp]

During the make process, the (ocamlc: unknown option ` - safe string '.) that appears,Why is this?

1）
make -C sw/ext pprzlink.update
make[1]: Entering directory /home/aston/paparazzi/sw/ext/pprzlink' make[2]: Entering directory /home/aston/paparazzi/sw/ext/pprzlink/lib/v2.0/ocaml'
Check for already installed pprzlink ocaml lib
Build bytecode lib

• ocamlfind ocamlc -safe-string -c common/convert.c
  ocamlc: unknown option `-safe-string'.

2）aston@ubuntu:~/paparazzi$ ./paparazzi
File "/home/aston/paparazzi/sw/supervision/python/paparazzicenter.py", line 36
self.conf: Conf = None
^
SyntaxError: invalid syntax

[Fabien-B]

The two errors seems unrelated to each other.

1. on what OS (and version) are you ? What is your version of ocamlc ? (ocamlc --version)

2. That's curious as well, what is your version of python ? (python3 --version)