Feature Requests item #1612190, was opened at 2006-12-09 16:48
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: nitro (nitrogenycs)
Assigned to: Nobody/Anonymous (nobody)
Summary: Py_DEBUG
Initial Comment:
Hello,
I am writing an extension module (Win32, VC8). Of course I need to #include
<Python.h>. Now, when _DEBUG is defined in my application Py_DEBUG gets defined
as well (in pyconfig.h). I don't want this to happen as I have to link to the
python debug library that way. However, I don't want to debug python, I only
want to debug my own application. So the automatic definition of Py_DEBUG
doesn't seem right. A solution that would be backwards compatible could look
like:
#ifdef _DEBUG && !defined(Py_NO_DEBUG)
# define Py_DEBUG
#endif
Could something like this be included in python? Note that #undef _DEBUG
#include <Python.h> #define _DEBUG does not work as VC8 complains in this case,
because some header files had the _DEBUG preprocessor symbol and some didn't.
That trick used to work in VC 6 and 7.x. I've seen a lot of people fighting
this problem.
Another problem that also arises from pyconfig.h is this code:
# ifdef _DEBUG
# pragma comment(lib,"python24_d.lib")
# else
I don't think it's clean that python tells my program what to link to. I am the
one who should (and wants to) do this via a linker switch. I know that some
people probably would regard the code above as a feature, but it's the opposite
imo. A backwards compatible change could look like:
#ifdef MS_COREDLL
# ifndef Py_BUILD_CORE /* not building the core - must be an ext */
# if defined(_MSC_VER) && !defined(Py_NO_AUTOMATIC_MSVC_LINK)
/* So MSVC users need not specify the .lib file in
their Makefile (other compilers are generally
taken care of by distutils.) */
# ifdef _DEBUG
# pragma comment(lib,"python24_d.lib")
# else
# pragma comment(lib,"python24.lib")
# endif /* _DEBUG */
# endif /* _MSC_VER */
# endif /* Py_BUILD_CORE */
#endif /* MS_COREDLL */
Thanks,
-Matthias
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