VS2015 Support: Backport "Issue python#22919: Windows build updated to support VC 14.0 (Visual Studio 2015), which will be used for the official 3.5 release."

This commit is a partial backport of python/cpython@65e4cb1. It was
originally designed to work with python-cmake-buildsystem.

This patch do not backport the define "timezone" as "_timezone" as it was done in Python 3.x.
Keeping "timezone" is required in Python 2.7.x to avoid the following build issue
``error C2032: '__timezone': function cannot be member of struct '__timeb64'``
associated with `sys/timeb.h`. The need for `sys/timeb.h` was removed in Python 3.x in python/cpython@6fc4ade and python/cpython@0011124
but is still used in Python 2.7.x.

The following modules have NOT been backported:

* Lib/distutils/sysconfig
* Modules/socketmodule.c .... : Not required since changes related to WSA have been introduced in Python 3.x (see python/cpython@6b4883d)
* Tools/buildbot
* PCBuild

Author: jcfr

Lib/ctypes/util.py

@@ -19,6 +19,8 @@ def _get_build_version():
         i = i + len(prefix)
         s, rest = sys.version[i:].split(" ", 1)
         majorVersion = int(s[:-2]) - 6
+        if majorVersion >= 13:
+           majorVersion += 1
         minorVersion = int(s[2:3]) / 10.0
         # I don't think paths are affected by minor version in version 6
         if majorVersion == 6:
@@ -36,8 +38,10 @@ def find_msvcrt():
             return None
         if version <= 6:
             clibname = 'msvcrt'
-        else:
+        elif version <= 13:
             clibname = 'msvcr%d' % (version * 10)
+        else:
+            clibname = 'appcrt%d' % (version * 10)
 
         # If python was built with in debug mode
         import imp

Lib/distutils/command/build_ext.py

@@ -196,7 +196,7 @@ def finalize_options(self):
             if MSVC_VERSION >= 9:
                 # Use the .lib files for the correct architecture
                 if self.plat_name == 'win32':
-                    suffix = ''
+                    suffix = 'win32'
                 else:
                     # win-amd64 or win-ia64
                     suffix = self.plat_name[4:]

Lib/distutils/msvc9compiler.py

@@ -182,6 +182,9 @@ def get_build_version():
     i = i + len(prefix)
     s, rest = sys.version[i:].split(" ", 1)
     majorVersion = int(s[:-2]) - 6
+    if majorVersion >= 13:
+        # v13 was skipped and should be v14
+        majorVersion += 1
     minorVersion = int(s[2:3]) / 10.0
     # I don't think paths are affected by minor version in version 6
     if majorVersion == 6:

Lib/distutils/msvccompiler.py

@@ -164,6 +164,9 @@ def get_build_version():
     i = i + len(prefix)
     s, rest = sys.version[i:].split(" ", 1)
     majorVersion = int(s[:-2]) - 6
+    if majorVersion >= 13:
+        # v13 was skipped and should be v14
+        majorVersion += 1
     minorVersion = int(s[2:3]) / 10.0
     # I don't think paths are affected by minor version in version 6
     if majorVersion == 6:

Modules/posixmodule.c

@@ -553,15 +553,33 @@ _PyInt_FromDev(PY_LONG_LONG v)
 /* The actual size of the structure is determined at runtime.
  * Only the first items must be present.
  */
+
+#if _MSC_VER >= 1900
+
+typedef struct {
+    CRITICAL_SECTION lock;
+    intptr_t osfhnd;
+    __int64 startpos;
+    char osfile;
+} my_ioinfo;
+
+#define IOINFO_L2E 6
+#define IOINFO_ARRAYS 128
+
+#else
+
 typedef struct {
     intptr_t osfhnd;
     char osfile;
 } my_ioinfo;
 
-extern __declspec(dllimport) char * __pioinfo[];
 #define IOINFO_L2E 5
-#define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)
 #define IOINFO_ARRAYS 64
+
+#endif
+
+extern __declspec(dllimport) char * __pioinfo[];
+#define IOINFO_ARRAY_ELTS   (1 << IOINFO_L2E)
 #define _NHANDLE_           (IOINFO_ARRAYS * IOINFO_ARRAY_ELTS)
 #define FOPEN 0x01
 #define _NO_CONSOLE_FILENO (intptr_t)-2

Modules/timemodule.c

@@ -710,15 +710,15 @@ inittimezone(PyObject *m) {
 #ifdef PYOS_OS2
     PyModule_AddIntConstant(m, "timezone", _timezone);
 #else /* !PYOS_OS2 */
-    PyModule_AddIntConstant(m, "timezone", timezone);
+    PyModule_AddIntConstant(m, "timezone", _timezone);
 #endif /* PYOS_OS2 */
 #ifdef HAVE_ALTZONE
     PyModule_AddIntConstant(m, "altzone", altzone);
 #else
 #ifdef PYOS_OS2
     PyModule_AddIntConstant(m, "altzone", _timezone-3600);
 #else /* !PYOS_OS2 */
-    PyModule_AddIntConstant(m, "altzone", timezone-3600);
+    PyModule_AddIntConstant(m, "altzone", _timezone-3600);
 #endif /* PYOS_OS2 */
 #endif
     PyModule_AddIntConstant(m, "daylight", daylight);

PC/bdist_wininst/install.c

@@ -1184,7 +1184,7 @@ static void CenterWindow(HWND hwnd)
 
 #include <prsht.h>
 
-BOOL CALLBACK
+INT_PTR CALLBACK
 IntroDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     LPNMHDR lpnm;
@@ -1533,7 +1533,7 @@ SCHEME *GetScheme(int major, int minor)
     return old_scheme;
 }
 
-BOOL CALLBACK
+INT_PTR CALLBACK
 SelectPythonDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     LPNMHDR lpnm;
@@ -1835,7 +1835,7 @@ static void CloseLogfile(void)
         fclose(logfile);
 }
 
-BOOL CALLBACK
+INT_PTR CALLBACK
 InstallFilesDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     LPNMHDR lpnm;
@@ -1990,7 +1990,7 @@ InstallFilesDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 }
 
 
-BOOL CALLBACK
+INT_PTR CALLBACK
 FinishedDlgProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
 {
     LPNMHDR lpnm;
@@ -2166,23 +2166,6 @@ BOOL NeedAutoUAC()
     return TRUE;
 }
 
-// Returns TRUE if the platform supports UAC.
-BOOL PlatformSupportsUAC()
-{
-    // Note that win2k does seem to support ShellExecute with 'runas',
-    // but does *not* support IsUserAnAdmin - so we just pretend things
-    // only work on XP and later.
-    BOOL bIsWindowsXPorLater;
-    OSVERSIONINFO winverinfo;
-    winverinfo.dwOSVersionInfoSize = sizeof(winverinfo);
-    if (!GetVersionEx(&winverinfo))
-        return FALSE; // something bad has gone wrong
-    bIsWindowsXPorLater =
-       ( (winverinfo.dwMajorVersion > 5) ||
-       ( (winverinfo.dwMajorVersion == 5) && (winverinfo.dwMinorVersion >= 1) ));
-    return bIsWindowsXPorLater;
-}
-
 // Spawn ourself as an elevated application.  On failure, a message is
 // displayed to the user - but this app will always terminate, even
 // on error.
@@ -2238,15 +2221,15 @@ int DoInstall(void)
 
     // See if we need to do the Vista UAC magic.
     if (strcmp(user_access_control, "force")==0) {
-        if (PlatformSupportsUAC() && !MyIsUserAnAdmin()) {
+        if (!MyIsUserAnAdmin()) {
             SpawnUAC();
             return 0;
         }
         // already admin - keep going
     } else if (strcmp(user_access_control, "auto")==0) {
         // Check if it looks like we need UAC control, based
         // on how Python itself was installed.
-        if (PlatformSupportsUAC() && !MyIsUserAnAdmin() && NeedAutoUAC()) {
+        if (!MyIsUserAnAdmin() && NeedAutoUAC()) {
             SpawnUAC();
             return 0;
         }

PC/pyconfig.h

@@ -231,6 +231,13 @@ typedef int pid_t;
 #define hypot _hypot
 #endif
 
+/* VS 2015 defines these names with a leading underscore */
+#if _MSC_VER >= 1900
+// #define timezone _timezone
+#define daylight _daylight
+#define tzname _tzname
+#endif
+
 /* Side by Side assemblies supported in VS 2005 and VS 2008 but not 2010*/
 #if _MSC_VER >= 1400 && _MSC_VER < 1600
 #define HAVE_SXS 1