New submission from RAW: The header file pyconfig.h mishandles the _POSIX_C_SOURCE and _XOPEN_SOURCE preprocessor macros.
For older versions of Python, the pyconfig.h header specifies: #define _POSIX_C_SOURCE 200112L and: #define _XOPEN_SOURCE 600 For newer versions of Python, the pyconfig.h header specifies: #define _POSIX_C_SOURCE 200809L and: #define _XOPEN_SOURCE 700 The Open Group has documentation about these symbols: http://pubs.opengroup.org/onlinepubs/007904975/functions/xsh_chap02_02.html In particular, the documentation states: A POSIX-conforming application should ensure that the feature test macro _POSIX_C_SOURCE is defined before inclusion of any header. So, having a header file attempting to set _POSIX_C_SOURCE violates this intention. Yes, I am well aware that the Python documentation says to include Python.h before any standard headers are included. However, this is still problematic. In particular, it causes trouble for source code that wishes to include the Python headers and wishes to use declarations that are made visible by setting later values for _POSIX_C_SOURCE and _XOPEN_SOURCE. I would suggest the pyconfig.h be updated to have something like this: #if !defined(_POSIX_C_SOURCE) || _POSIX_C_SOURCE < 200112L #ifdef _POSIX_C_SOURCE #warning Python expects -D_POSIX_C_SOURCE=200112L or later #undef _POSIX_C_SOURCE #endif #define _POSIX_C_SOURCE 200112L #endif and this: #if !defined(_XOPEN_SOURCE) || _XOPEN_SOURCE < 600 #ifdef _XOPEN_SOURCE #warning Python expects -D_XOPEN_SOURCE=600 or later #undef _XOPEN_SOURCE #endif #define _XOPEN_SOURCE 600 #endif ---------- components: Library (Lib) messages: 181309 nosy: RAW priority: normal severity: normal status: open title: Mishandled _POSIX_C_SOURCE and _XOPEN_SOURCE in pyconfig.h type: compile error versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4, Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue17120> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
