* Added support for X11 modules.
* Makefile: change location of FORMS library.
* posixmodule.c: turn #if 0 into #ifdef MSDOS (stuff in unistd.h or not)
* Almost all .h files: added CPP magic to avoid duplicate inclusions and
  to support inclusion from C++.
diff --git a/Parser/assert.h b/Parser/assert.h
index ac9c5d2..dbce369 100644
--- a/Parser/assert.h
+++ b/Parser/assert.h
@@ -1,3 +1,9 @@
+#ifndef Py_ASSERT_H
+#define Py_ASSERT_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /***********************************************************
 Copyright 1991, 1992, 1993 by Stichting Mathematisch Centrum,
 Amsterdam, The Netherlands.
@@ -23,3 +29,8 @@
 ******************************************************************/
 
 #define assert(e) { if (!(e)) { printf("Assertion failed\n"); abort(); } }
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_ASSERT_H */