Part of SF patch #102409 by jlt63: Cygwin Python DLL and Shared
Extension Patch.
Note: this could use some testing on NeXT, DG/UX, or BeOS, because of
the changes in the Makefile regarding $(LDLIBRARY).
diff --git a/acconfig.h b/acconfig.h
index b188747..23f06ea 100644
--- a/acconfig.h
+++ b/acconfig.h
@@ -185,3 +185,15 @@
/* Leave that blank line there-- autoheader needs it! */
+
+@BOTTOM@
+
+#ifdef __CYGWIN__
+#ifdef USE_DL_IMPORT
+#define DL_IMPORT(RTYPE) __declspec(dllimport) RTYPE
+#define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
+#else
+#define DL_IMPORT(RTYPE) __declspec(dllexport) RTYPE
+#define DL_EXPORT(RTYPE) __declspec(dllexport) RTYPE
+#endif
+#endif