Public bug reported:
gcc and g++ interprets pyport.h in different way.
```
(system) inada-n@oldbench:~$ cat longbits.c
#include <Python.h>
#include <longintrepr.h>
int main() {
printf("digit bits = %d\n", PYLONG_BITS_IN_DIGIT);
printf("sizeof(digit) = %lu\n", sizeof(digit));
}
(system) inada-n@oldbench:~$ gcc longbits.c -I /usr/include/python2.7/
(system) inada-n@oldbench:~$ ./a.out
digit bits = 30
sizeof(digit) = 4
(system) inada-n@oldbench:~$ g++ longbits.c -I /usr/include/python2.7/
(system) inada-n@oldbench:~$ ./a.out
digit bits = 15
sizeof(digit) = 2
```
This breaks some extension modules. For example, see
https://github.com/msgpack/msgpack-python/issues/169
Please backport this bugfix.
https://github.com/python/cpython/commit/050ba5ec1e941e05607ef29049bde08798387bcc
** Affects: python2.7 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1545899
Title:
PYLONG_BITS_IN_DIGIT is misconfigured on g++
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