From 1770d13119fe5593a290c35ed266079c1bf46f0d Mon Sep 17 00:00:00 2001
From: Joey Payne <jyapayne@gmail.com>
Date: Sun, 10 Mar 2019 17:53:41 -0600
Subject: [PATCH] Make setStackBottom backwards compatible

---
 godot/nim/godotmacros.nim | 23 ++++++++++++++++------
 godot/nim/godotnim.nim    | 41 ++++++++++++++++++++++++++++-----------
 2 files changed, 47 insertions(+), 17 deletions(-)

diff --git a/godot/nim/godotmacros.nim b/godot/nim/godotmacros.nim
index 9859619..5b17717 100644
--- a/godot/nim/godotmacros.nim
+++ b/godot/nim/godotmacros.nim
@@ -544,17 +544,28 @@ proc genType(obj: ObjectDecl): NimNode {.compileTime.} =
   template registerGodotMethod(classNameLit, classNameIdent, methodNameIdent,
                                methodNameLit, minArgs, maxArgs,
                                argTypes, methFuncIdent, hasReturnValue) =
-    {.emit: """/*TYPESECTION*/
-N_NOINLINE(void, nimGC_setStackBottom)(void* thestackbottom);
-""".}
+    when (NimMajor, NimMinor, NimPatch) < (0, 19, 0):
+      {.emit: """/*TYPESECTION*/
+      N_NOINLINE(void, setStackBottom)(void* thestackbottom);
+      """.}
+    else:
+      {.emit: """/*TYPESECTION*/
+      N_NOINLINE(void, nimGC_setStackBottom)(void* thestackbottom);
+      """.}
+
     proc methFuncIdent(obj: ptr GodotObject, methodData: pointer,
                        userData: pointer, numArgs: cint,
                        args: var array[MAX_ARG_COUNT, ptr GodotVariant]):
                       GodotVariant {.noconv.} =
       var stackBottom {.volatile.}: pointer
-      {.emit: """
-      nimGC_setStackBottom((void*)(&`stackBottom`));
-      """.}
+      when (NimMajor, NimMinor, NimPatch) < (0, 19, 0):
+        {.emit: """
+        setStackBottom((void*)(&`stackBottom`));
+        """.}
+      else:
+        {.emit: """
+        nimGC_setStackBottom((void*)(&`stackBottom`));
+        """.}
       let self = cast[classNameIdent](userData)
       const isStaticCall = methodNameLit == cstring"_ready" or
                            methodNameLit == cstring"_process" or
diff --git a/godot/nim/godotnim.nim b/godot/nim/godotnim.nim
index 45161fc..4694572 100644
--- a/godot/nim/godotnim.nim
+++ b/godot/nim/godotnim.nim
@@ -832,10 +832,16 @@ proc fromVariant*[T: Table or TableRef or OrderedTable or OrderedTableRef](t: va
   else:
     result = ConversionResult.TypeError
 
-{.emit: """/*TYPESECTION*/
-N_LIB_EXPORT N_CDECL(void, NimMain)(void);
-N_NOINLINE(void, nimGC_setStackBottom)(void* thestackbottom);
-""".}
+when (NimMajor, NimMinor, NimPatch) < (0, 19, 0):
+  {.emit: """/*TYPESECTION*/
+  N_LIB_EXPORT N_CDECL(void, NimMain)(void);
+  N_NOINLINE(void, setStackBottom)(void* thestackbottom);
+  """.}
+else:
+  {.emit: """/*TYPESECTION*/
+  N_LIB_EXPORT N_CDECL(void, NimMain)(void);
+  N_NOINLINE(void, nimGC_setStackBottom)(void* thestackbottom);
+  """.}
 
 var nativeLibHandle: pointer
 proc getNativeLibHandle*(): pointer =
@@ -848,10 +854,17 @@ proc godot_nativescript_init(handle: pointer) {.
   nativeLibHandle = handle
 
   var stackBottom {.volatile.}: pointer
-  {.emit: """
-    NimMain();
-    nimGC_setStackBottom((void*)(&`stackBottom`));
-  """.}
+
+  when (NimMajor, NimMinor, NimPatch) < (0, 19, 0):
+    {.emit: """
+      NimMain();
+      setStackBottom((void*)(&`stackBottom`));
+    """.}
+  else:
+    {.emit: """
+      NimMain();
+      nimGC_setStackBottom((void*)(&`stackBottom`));
+    """.}
   GC_fullCollect()
   GC_disable()
 
@@ -886,9 +899,15 @@ proc registerFrameCallback*(cb: proc () {.closure.}) =
 
 proc godot_nativescript_frame() {.cdecl, exportc, dynlib.} =
   var stackBottom {.volatile.}: pointer
-  {.emit: """
-  nimGC_setStackBottom((void*)(&`stackBottom`));
-  """.}
+
+  when (NimMajor, NimMinor, NimPatch) < (0, 19, 0):
+    {.emit: """
+    setStackBottom((void*)(&`stackBottom`));
+    """.}
+  else:
+    {.emit: """
+    nimGC_setStackBottom((void*)(&`stackBottom`));
+    """.}
   for cb in idleCallbacks:
     cb()
   GC_step(nimGcStepLengthUs, true, 0)