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diff --git a/docs/users_guide/debugging.xml b/docs/users_guide/debugging.xml
index 4ab4379..d6a520a 100644
--- a/docs/users_guide/debugging.xml
+++ b/docs/users_guide/debugging.xml
@@ -280,14 +280,25 @@
+ :
+
+
+
+ Show the output of each run of the simplifier. Used when even
+ doesn't cut it.
+
+
+
+
+
:
Show the output of each iteration
of the simplifier (each run of the simplifier has a maximum
- number of iterations, normally 4). Used when even
- doesn't cut it.
+ number of iterations, normally 4). This outputs even more information
+ than .
@@ -412,6 +423,20 @@
+
+
+
+
+ Suppress the printing of uniques in debugging output. This may make
+ the printout ambiguous (e.g. unclear where an occurrence of 'x' is bound), but
+ it makes the output of two compiler runs have many fewer gratuitous differences,
+ so you can realistically apply diff. Once diff
+ has shown you where to look, you can try again without
+
+
+
+
+
@@ -424,14 +449,18 @@
-
-
-
+
+
+
-
- Have the renamer report what imports does not
- contribute.
-
+
+ Suppress any unsolicited debugging output. When GHC
+ has been built with the DEBUG option it
+ occasionally emits debug output of interest to developers.
+ The extra output can confuse the testing framework and
+ cause bogus test failures, so this flag is provided to
+ turn it off.
+
@@ -601,21 +630,9 @@ Main.skip2{-r1L6-} =
of platform-specific code that needs to be written in order to get
unregisterised compilation going is usually fairly small.
-
-
-
- :
-
-
-
- Compile via vanilla ANSI C only, turning off
- platform-specific optimisations. NOTE: in order to use
- , you need to have a set of libraries
- (including the RTS) built for unregisterised compilation.
- This amounts to building GHC with way "u" enabled.
-
-
-
+ Unregisterised compilation cannot be selected at
+ compile-time; you have to build GHC with the appropriate options
+ set. Consult the GHC Building Guide for details.