X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2FMakefile;h=ce69bae2f24087d5f7b80219447288c721af8490;hb=e4e18be46b433be5fa9cabea98fe8ba4afa3baec;hp=5cce4bc4dc2dca2758563ae0809c4068c454a8ab;hpb=35a45c7c79d1c64bf3fb57865e6bd52dca93a31a;p=ghc-hetmet.git

diff --git a/compiler/Makefile b/compiler/Makefile
index 5cce4bc..ce69bae 100644
--- a/compiler/Makefile
+++ b/compiler/Makefile
@@ -685,6 +685,10 @@ parser/Lexer_HC_OPTS += -funbox-strict-fields
 # prototype via a global option instead of a myriad of per-file OPTIONS
 SRC_HC_OPTS += '-\#include "cutils.h"'
 
+ifeq "$(ghc_ge_605)" "NO"
+utils/LazyUniqFM_HC_OPTS += -fallow-undecidable-instances
+endif
+
 # ----------------------------------------------------------------------------
 #		Generate supporting stuff for prelude/PrimOp.lhs 
 #		from prelude/primops.txt