Fix rt/dmain2 to properly declare one missing symbol (probably visibl…

…e due to bug 314 while building the whole library but not when building the unittest.

Start building druntime with -O on 64 bit, everything passes now

posix.mak

@@ -6,17 +6,10 @@ IMPDIR=import
 
 MODEL=32
 
-ifeq ($(MODEL),64)
-DFLAGS=-m$(MODEL) -release -inline -nofloat -w -d -Isrc -Iimport
-UDFLAGS=-m$(MODEL) -release -nofloat -w -d -Isrc -Iimport
-
-CFLAGS=-m$(MODEL)
-else
 DFLAGS=-m$(MODEL) -O -release -inline -nofloat -w -d -Isrc -Iimport 
 UDFLAGS=-m$(MODEL) -O -release -nofloat -w -d -Isrc -Iimport 
 
 CFLAGS=-m$(MODEL) -O
-endif
 
 OBJDIR=obj
 DRUNTIME_BASE=druntime
@@ -402,11 +395,9 @@ unittest : $(addprefix $(OBJDIR)/,$(SRC_D_MODULES)) $(DRUNTIME) $(OBJDIR)/emptym
 	@echo done
 
 ifeq ($(MODEL),64)
-DISABLED_TESTS = \
-	rt/dmain2
+DISABLED_TESTS =
 else
-DISABLED_TESTS = \
-	rt/dmain2
+DISABLED_TESTS =
 endif
 
 $(addprefix $(OBJDIR)/,$(DISABLED_TESTS)) :

src/rt/dmain2.d

@@ -57,7 +57,9 @@ version (all)
         }
         _d_unhandled = t;
     }
-
+
+    extern (C) Throwable.TraceInfo _d_traceContext(void* ptr = null);
+
     extern (C) void _d_createTrace(Object *o)
     {
         auto t = cast(Throwable) o;