add warning about ultrix cc
diff --git a/Misc/FAQ b/Misc/FAQ
index fcc3637..b008e70 100644
--- a/Misc/FAQ
+++ b/Misc/FAQ
@@ -584,6 +584,11 @@
reports on successful "out-of-the-box" ports on Linux. The standard
configure script runs just fine on Linux.
+Q. Trouble with prototypes on Ultrix.
+
+A. Ultrix cc seems broken -- use gcc, or edit config.h to #undef
+HAVE_PROTOTYPES.
+
3.11. Q. Other trouble building Python on platform X.
A. Please email the details to <guido@cwi.nl> and I'll look into it.