Issue #13226: Add RTLD_xxx constants to the os module. These constants can by
used with sys.setdlopenflags().
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index fa50296..f4476b7 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -121,6 +121,10 @@
 #endif
 #endif
 
+#ifdef HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
 /* Various compilers have only certain posix functions */
 /* XXX Gosh I wish these were all moved into pyconfig.h */
 #if defined(PYCC_VACPP) && defined(PYOS_OS2)
@@ -11423,6 +11427,28 @@
     if (ins(d, "XATTR_SIZE_MAX", (long)XATTR_SIZE_MAX)) return -1;
 #endif
 
+#ifdef RTLD_LAZY
+    if (PyModule_AddIntMacro(d, RTLD_LAZY)) return -1;
+#endif
+#ifdef RTLD_NOW
+    if (PyModule_AddIntMacro(d, RTLD_NOW)) return -1;
+#endif
+#ifdef RTLD_GLOBAL
+    if (PyModule_AddIntMacro(d, RTLD_GLOBAL)) return -1;
+#endif
+#ifdef RTLD_LOCAL
+    if (PyModule_AddIntMacro(d, RTLD_LOCAL)) return -1;
+#endif
+#ifdef RTLD_NODELETE
+    if (PyModule_AddIntMacro(d, RTLD_NODELETE)) return -1;
+#endif
+#ifdef RTLD_NOLOAD
+    if (PyModule_AddIntMacro(d, RTLD_NOLOAD)) return -1;
+#endif
+#ifdef RTLD_DEEPBIND
+    if (PyModule_AddIntMacro(d, RTLD_DEEPBIND)) return -1;
+#endif
+
 #if defined(PYOS_OS2)
     if (insertvalues(d)) return -1;
 #endif