spread the extern "C" { } magic pixie dust around. Python itself builds now

using a C++ compiler. Still lots and lots of errors in the modules built by
setup.py, and a bunch of warnings from g++ in the core.

Python/errors.c

@@ -16,6 +16,11 @@ extern char *strerror(int);
 
 #include <ctype.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+
 void
 PyErr_Restore(PyObject *type, PyObject *value, PyObject *traceback)
 {
@@ -786,3 +791,8 @@ PyErr_ProgramText(const char *filename, int lineno)
 	}
 	return NULL;
 }
+
+#ifdef __cplusplus
+}
+#endif
+

Python/getmtime.c

@@ -6,6 +6,10 @@
 #include "Python.h"
 #include "pyconfig.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 time_t
 PyOS_GetLastModificationTime(char *path, FILE *fp)
 {
@@ -15,3 +19,8 @@ PyOS_GetLastModificationTime(char *path, FILE *fp)
 	else
 		return st.st_mtime;
 }
+
+#ifdef __cplusplus
+}
+#endif
+

Python/getopt.c

@@ -27,6 +27,10 @@
 #include <stdio.h>
 #include <string.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int _PyOS_opterr = 1;          /* generate error messages */
 int _PyOS_optind = 1;          /* index into argv array   */
 char *_PyOS_optarg = NULL;     /* optional argument       */
@@ -81,3 +85,8 @@ int _PyOS_GetOpt(int argc, char **argv, char *optstring)
 
 	return option;
 }
+
+#ifdef __cplusplus
+}
+#endif
+

Python/import.c

@@ -17,6 +17,9 @@
 #ifdef HAVE_FCNTL_H
 #include <fcntl.h>
 #endif
+#ifdef __cplusplus
+extern "C" { 
+#endif
 
 extern time_t PyOS_GetLastModificationTime(char *, FILE *);
 						/* In getmtime.c */
@@ -2947,3 +2950,7 @@ PyImport_AppendInittab(char *name, void (*initfunc)(void))
 
 	return PyImport_ExtendInittab(newtab);
 }
+
+#ifdef __cplusplus
+}
+#endif

Python/pystate.c

@@ -37,6 +37,10 @@ static PyThread_type_lock head_mutex = NULL; /* Protects interp->tstate_head */
 #define HEAD_LOCK() PyThread_acquire_lock(head_mutex, WAIT_LOCK)
 #define HEAD_UNLOCK() PyThread_release_lock(head_mutex)
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* The single PyInterpreterState used by this process'
    GILState implementation
 */
@@ -552,4 +556,11 @@ PyGILState_Release(PyGILState_STATE oldstate)
 	else if (oldstate == PyGILState_UNLOCKED)
 		PyEval_SaveThread();
 }
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif /* WITH_THREAD */
+
+

Python/pythonrun.c

@@ -37,6 +37,10 @@
 				   _Py_GetRefTotal())
 #endif
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 extern char *Py_GetPath(void);
 
 extern grammar _PyParser_Grammar; /* From graminit.c */
@@ -1692,3 +1696,8 @@ PyParser_SimpleParseString(const char *str, int start)
 {
 	return PyParser_SimpleParseStringFlags(str, start, 0);
 }
+
+#ifdef __cplusplus
+}
+#endif
+