使用Python3.6执行makeinstall时出现警告

Question

我下载了Python3.6并尝试执行通常的./configure && make install

我收到警告：

/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c: In function 'classify_argument':
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:195:18: warning: suggest braces around empty body in an 'else' statement [-Wempty-body]
    FFI_ASSERT (0);
                  ^
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:224:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < words; i++)
                ^
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:245:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for (i = 0; i < num; i++)
                    ^
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:264:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
      for (i = 1; i < words; i++)
                    ^
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:270:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (i = 0; i < words; i++)
                ^
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c: In function 'examine_argument':
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:323:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (i = 0; i < n; ++i)
                 ^
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c: In function 'ffi_call':
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:484:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (j = 0; j < n; j++, a += 8, size -= 8)
                  ^
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c: In function 'ffi_closure_unix64_inner':
/usr/src/Python-3.6.0/Modules/_ctypes/libffi/src/x86/ffi64.c:659:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    for (j = 0; j < n; j++, a += 8)
                  ^

我需要小心处理吗？在

Answer 1

已解决安装这些软件包的问题：

sudo apt-get install libffi6 libffi-dev

然后我可以像往常一样安装Python 3.6：

^{pr2}$

为了编写文档：我使用altinstall保留了python2.7（预装在ubuntu16.10上）并能够使用python3.x

我可以给“旧”python开发票：

python

或者新的python

python3.6