NimJit

Requires the following compiler patch for the time being:

diff --git a/compiler/nimeval.nim b/compiler/nimeval.nim
index 82e2f0812..3be5063a8 100644
--- a/compiler/nimeval.nim
+++ b/compiler/nimeval.nim
@@ -17,9 +17,9 @@ import
 type
   Interpreter* = ref object ## Use Nim as an interpreter with this object
     mainModule: PSym
-    graph: ModuleGraph
+    graph*: ModuleGraph
     scriptName: string
-    idgen: IdGenerator
+    idgen*: IdGenerator
 
 iterator exportedSymbols*(i: Interpreter): PSym =
   assert i != nil
@@ -104,7 +104,7 @@ proc findNimStdLibCompileTime*(): string =
 proc createInterpreter*(scriptName: string;
                         searchPaths: openArray[string];
                         flags: TSandboxFlags = {},
-                        defines = @[("nimscript", "true")],
+                        defines = @[("nimscript", "false")],
                         registerOps = true): Interpreter =
   var conf = newConfigRef()
   var cache = newIdentCache()
@@ -113,8 +113,17 @@ proc createInterpreter*(scriptName: string;
   initDefines(conf.symbols)
   for define in defines:
     defineSymbol(conf.symbols, define[0], define[1])
+  conf.selectedGC = gcOrc ## <-- this is what's needed to get destructors working!
+  defineSymbol(conf.symbols, "gcorc")
+  defineSymbol(conf.symbols, "gcdestructors")
+  incl conf.globalOptions, optSeqDestructors
+  incl conf.globalOptions, optTinyRtti
+  defineSymbol(conf.symbols, "nimSeqsV2")
+  defineSymbol(conf.symbols, "nimV2")
+  defineSymbol(conf.symbols, "danger")
+  defineSymbol(conf.symbols, "release")
   registerPass(graph, semPass)
-  registerPass(graph, evalPass)
+  #registerPass(graph, evalPass)
 
   for p in searchPaths:
     conf.searchPaths.add(AbsoluteDir p)
@@ -124,7 +133,7 @@ proc createInterpreter*(scriptName: string;
   incl(m.flags, sfMainModule)
   var idgen = idGeneratorFromModule(m)
   var vm = newCtx(m, cache, graph, idgen)
-  vm.mode = emRepl
+  #vm.mode = emRepl
   vm.features = flags
   if registerOps:
     vm.registerAdditionalOps() # Required to register parts of stdlib modules