compiler warnings of unknown severity

[ThomasWaldmann]

Each time I install msgpack-python, I get these compiler warnings.

If some C developer could review these and fix the code, that would be great and avoid that users of msgpack-python have to worry about their data.

Downloading/unpacking msgpack-python>=0.4.6 (from borgbackup==0.24.0-73.g2332ee4)
  Downloading msgpack-python-0.4.6.tar.gz (116kB): 116kB downloaded
  Running setup.py (path:/home/tw/testing/build/msgpack-python/setup.py) egg_info for package msgpack-python

Installing collected packages: borgbackup, msgpack-python
  Running setup.py install for msgpack-python
    building 'msgpack._packer' extension
    x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -D__LITTLE_ENDIAN__=1 -I. -I/usr/include/python3.4m -I/home/tw/testing/include/python3.4m -c msgpack/_packer.cpp -o build/temp.linux-x86_64-3.4/msgpack/_packer.o
    cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++ [enabled by default]
    x86_64-linux-gnu-g++ -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.4/msgpack/_packer.o -o build/lib.linux-x86_64-3.4/msgpack/_packer.cpython-34m.so
    building 'msgpack._unpacker' extension
    x86_64-linux-gnu-gcc -pthread -DNDEBUG -g -fwrapv -O2 -Wall -Wstrict-prototypes -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 -fPIC -D__LITTLE_ENDIAN__=1 -I. -I/usr/include/python3.4m -I/home/tw/testing/include/python3.4m -c msgpack/_unpacker.cpp -o build/temp.linux-x86_64-3.4/msgpack/_unpacker.o
    cc1plus: warning: command line option ‘-Wstrict-prototypes’ is valid for C/ObjC but not for C++ [enabled by default]
    msgpack/_unpacker.pyx: In function ‘PyObject* __pyx_pf_7msgpack_9_unpacker_2unpackb(PyObject*, PyObject*, PyObject*, PyObject*, int, PyObject*, PyObject*, PyObject*, PyObject*, Py_ssize_t, Py_ssize_t, Py_ssize_t, Py_ssize_t, Py_ssize_t)’:
    msgpack/_unpacker.pyx:141:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             if off < buf_len:
                                     ^
    msgpack/_unpacker.pyx: In function ‘PyObject* __pyx_f_7msgpack_9_unpacker_8Unpacker_read_from_file(__pyx_obj_7msgpack_9_unpacker_Unpacker*)’:
    msgpack/_unpacker.pyx:367:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
                         self.max_buffer_size - (self.buf_tail - self.buf_head)
                         ^
    msgpack/_unpacker.pyx: In function ‘PyObject* __pyx_pf_7msgpack_9_unpacker_8Unpacker_8read_bytes(__pyx_obj_7msgpack_9_unpacker_Unpacker*, Py_ssize_t)’:
    msgpack/_unpacker.pyx:412:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             nread = min(self.buf_tail - self.buf_head, nbytes)
                         ^
    In file included from msgpack/unpack.h:278:0,
                     from msgpack/_unpacker.cpp:241:
    msgpack/unpack_template.h: In function ‘int unpack_execute(unpack_context*, const char*, size_t, size_t*) [with bool construct = false; unpack_context = unpack_context; size_t = long unsigned int]’:
    msgpack/unpack_template.h:346:9: warning: ‘obj’ may be used uninitialized in this function [-Wmaybe-uninitialized]
             c->map_key = obj;
             ^
    x86_64-linux-gnu-g++ -pthread -shared -Wl,-O1 -Wl,-Bsymbolic-functions -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-Bsymbolic-functions -Wl,-z,relro -g -fstack-protector --param=ssp-buffer-size=4 -Wformat -Werror=format-security -D_FORTIFY_SOURCE=2 build/temp.linux-x86_64-3.4/msgpack/_unpacker.o -o build/lib.linux-x86_64-3.4/msgpack/_unpacker.cpython-34m.so

Successfully installed borgbackup msgpack-python

I'm using Ubuntu Linux 14.04 64bit in case that matters.

[ThomasWaldmann]

anyone?