X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FHsVersions.h;h=464bf820297d5b74ba15697b8b159aff9ddca20c;hb=5109078b26bdbf226acdf1b0fe7c2861a7114571;hp=0c41fa521e57878ac793e0aff2d06393f6b1e19f;hpb=dd8f4c6420e51736dc2e01d8aebacaa2f255451b;p=ghc-hetmet.git

diff --git a/compiler/HsVersions.h b/compiler/HsVersions.h
index 0c41fa5..464bf82 100644
--- a/compiler/HsVersions.h
+++ b/compiler/HsVersions.h
@@ -37,17 +37,22 @@ name = Util.global (value) :: IORef (ty); \
 #define COMMA ,
 
 #ifdef DEBUG
+#define debugIsOn True
 #define ASSERT(e) if (not (e)) then (assertPanic __FILE__ __LINE__) else
 #define ASSERT2(e,msg) if (not (e)) then (assertPprPanic __FILE__ __LINE__ (msg)) else
 #define WARN( e, msg ) (warnPprTrace (e) __FILE__ __LINE__ (msg))
 #define ASSERTM(mbool) do { bool <- mbool; ASSERT(bool) return () }
 #define ASSERTM2(mbool,msg) do { bool <- mbool; ASSERT2(bool,msg) return () }
 #else
-#define ASSERT(e)      if False then error "ASSERT"  else
-#define ASSERT2(e,msg) if False then error "ASSERT2" else
-#define ASSERTM(e)
-#define ASSERTM2(e,msg)
-#define WARN(e,msg)    if False then error "WARN"    else
+#define debugIsOn False
+-- We have to actually use all the variables we are given or we may get
+-- unused variable warnings when DEBUG is off.
+#define ASSERT(e)      if False && (not (e)) then panic "ASSERT" else
+#define ASSERT2(e,msg) if False && (not (e)) then pprPanic "ASSERT2" (msg) else
+#define ASSERTM(e)       do { let { _mbool = (e) } }
+-- Here we deliberately don't use when as Control.Monad might not be imported
+#define ASSERTM2(e,msg)  do { let { _mbool = (e) }; if False then panic "ASSERTM2" else return () }
+#define WARN(e,msg)    if False && (e) then pprPanic "WARN" (msg) else
 #endif
 
 -- This #ifndef lets us switch off the "import FastString"