note about HP compiler. CC="cc -Ae" is least broken, but still broken

README

@@ -366,7 +366,8 @@ AIX:	A complete overhaul of the shared library support is now in
 HP-UX:	When using threading, you may have to add -D_REENTRANT to the
 	OPT variable in the top-level Makefile; reported by Pat Knight,
 	this seems to make a difference (at least for HP-UX 10.20)
-	even though pyconfig.h defines it.
+	even though pyconfig.h defines it. Experience seems to show that
+        building with HP's compiler works best if you set CC="cc -Ae".
 
 HP PA-RISC 2.0: A recent bug report (http://www.python.org/sf/546117)
 	suggests that the C compiler in this 64-bit system has bugs