Merge branch 'msvc-cleanup' into devel

Merged Jason Erickson devel branch after collapsing a few commits together
where it made sense.

psycopg/config.h

@@ -51,6 +51,10 @@ extern HIDDEN int psycopg_debug_enabled;
 #else /* !__GNUC__ or __APPLE__ */
 #ifdef PSYCOPG_DEBUG
 #include <stdarg.h>
+#ifdef _WIN32
+#include <process.h>
+#define getpid _getpid
+#endif
 static void Dprintf(const char *fmt, ...)
 {
     va_list ap;

psycopg/connection_type.c

@@ -939,7 +939,7 @@ connection_repr(connectionObject *self)
 static int
 connection_traverse(connectionObject *self, visitproc visit, void *arg)
 {
-    Py_VISIT(self->tpc_xid);
+    Py_VISIT((PyObject *)(self->tpc_xid));
     Py_VISIT(self->async_cursor);
     Py_VISIT(self->notice_list);
     Py_VISIT(self->notice_filter);

psycopg/lobject_type.c

@@ -124,10 +124,11 @@ static PyObject *
 psyco_lobj_read(lobjectObject *self, PyObject *args)
 {
     PyObject *res;
-    int where, end, size = -1;
+    int where, end;
+    Py_ssize_t size = -1;
     char *buffer;
 
-    if (!PyArg_ParseTuple(args, "|i", &size)) return NULL;
+    if (!PyArg_ParseTuple(args, "|" CONV_CODE_PY_SSIZE_T,  &size)) return NULL;
 
     EXC_IF_LOBJ_CLOSED(self);
     EXC_IF_LOBJ_LEVEL0(self);

psycopg/xid_type.c

@@ -100,7 +100,8 @@ static int
 xid_init(XidObject *self, PyObject *args, PyObject *kwargs)
 {
     static char *kwlist[] = {"format_id", "gtrid", "bqual", NULL};
-    int format_id, i, gtrid_len, bqual_len;
+    int format_id;
+    size_t i, gtrid_len, bqual_len;
     const char *gtrid, *bqual;
     PyObject *tmp;
 

setup.py

@@ -155,6 +155,13 @@ class psycopg_build_ext(build_ext):
     def get_pg_config(self, kind):
         return get_pg_config(kind, self.pg_config)
 
+    def get_export_symbols(self, ext):
+        # Fix MSVC seeing two of the same export symbols.
+        if self.get_compiler().lower().startswith('msvc'):
+            return []
+        else:
+            return build_ext.get_export_symbols(self, ext)
+
     def build_extension(self, ext):
         build_ext.build_extension(self, ext)
 
@@ -181,13 +188,7 @@ class psycopg_build_ext(build_ext):
         compiler_name = self.get_compiler().lower()
         compiler_is_msvc = compiler_name.startswith('msvc')
         compiler_is_mingw = compiler_name.startswith('mingw')
-        if compiler_is_msvc:
-            # If we're using MSVC 7.1 or later on a 32-bit platform, add the
-            # /Wp64 option to generate warnings about Win64 portability
-            # problems.
-            if sysVer >= (2,4) and struct.calcsize('P') == 4:
-                extra_compiler_args.append('/Wp64')
-        elif compiler_is_mingw:
+        if compiler_is_mingw:
             # Default MinGW compilation of Python extensions on Windows uses
             # only -O:
             extra_compiler_args.append('-O3')