gh-131942: Use the Python-specific Py_DEBUG macro rather than _DEBUG in Windows-related C code (GH-131944)

PC/launcher.c

@@ -140,7 +140,7 @@ static wchar_t * get_env(wchar_t * key)
     return buf;
 }
 
-#if defined(_DEBUG)
+#if defined(Py_DEBUG)
 /* Do not define EXECUTABLEPATH_VALUE in debug builds as it'll
    never point to the debug build. */
 #if defined(_WINDOWS)

PC/pyconfig.h.in

@@ -94,6 +94,11 @@ WIN32 is still required for the locale module.
 #endif
 #endif /* Py_BUILD_CORE || Py_BUILD_CORE_BUILTIN || Py_BUILD_CORE_MODULE */
 
+/* _DEBUG implies Py_DEBUG */
+#ifdef _DEBUG
+#  define Py_DEBUG 1
+#endif
+
 /* Define to 1 if you want to disable the GIL */
 /* Uncomment the definition for free-threaded builds, or define it manually
  * when compiling extension modules. Note that we test with #ifdef, so
@@ -319,21 +324,21 @@ Py_NO_ENABLE_SHARED to find out.  Also support MS_NO_COREDLL for b/w compat */
                         This is relevant when using build-system generator (e.g CMake) where
                         the linking is explicitly handled */
 #                       if defined(Py_GIL_DISABLED)
-#                       if defined(_DEBUG)
+#                       if defined(Py_DEBUG)
 #                               pragma comment(lib,"python315t_d.lib")
 #                       elif defined(Py_LIMITED_API)
 #                               pragma comment(lib,"python3t.lib")
 #                       else
 #                               pragma comment(lib,"python315t.lib")
-#                       endif /* _DEBUG */
+#                       endif /* Py_DEBUG */
 #                       else /* Py_GIL_DISABLED */
-#                       if defined(_DEBUG)
+#                       if defined(Py_DEBUG)
 #                               pragma comment(lib,"python315_d.lib")
 #                       elif defined(Py_LIMITED_API)
 #                               pragma comment(lib,"python3.lib")
 #                       else
 #                               pragma comment(lib,"python315.lib")
-#                       endif /* _DEBUG */
+#                       endif /* Py_DEBUG */
 #                       endif /* Py_GIL_DISABLED */
 #               endif /* _MSC_VER && !Py_NO_LINK_LIB */
 #       endif /* Py_BUILD_CORE */
@@ -376,11 +381,6 @@ Py_NO_ENABLE_SHARED to find out.  Also support MS_NO_COREDLL for b/w compat */
 #       define ALIGNOF_MAX_ALIGN_T 8
 #endif
 
-#ifdef _DEBUG
-#       define Py_DEBUG
-#endif
-
-
 #ifdef MS_WIN32
 
 #define SIZEOF_SHORT 2

PC/python_uwp.cpp

@@ -19,13 +19,13 @@
 #include <winrt\Windows.Storage.h>
 
 #ifdef PYTHONW
-#ifdef _DEBUG
+#ifdef Py_DEBUG
 const wchar_t *PROGNAME = L"pythonw_d.exe";
 #else
 const wchar_t *PROGNAME = L"pythonw.exe";
 #endif
 #else
-#ifdef _DEBUG
+#ifdef Py_DEBUG
 const wchar_t *PROGNAME = L"python_d.exe";
 #else
 const wchar_t *PROGNAME = L"python.exe";

PC/python_ver_rc.h

@@ -10,7 +10,7 @@
 #define MS_WINDOWS
 #include "modsupport.h"
 #include "patchlevel.h"
-#ifdef _DEBUG
+#ifdef Py_DEBUG
 #   define PYTHON_DEBUG_EXT "_d"
 #else
 #   define PYTHON_DEBUG_EXT