bite the bullet and make 'initStackBottom' a compilerproc

compiler/cgen.nim

@@ -792,8 +792,9 @@ proc getFileHeader(cfilenoext: string): PRope =
 proc genMainProc(m: BModule) = 
   const 
     CommonMainBody = 
-        "  nim__datInit();$n" &
-        "  systemInit();$n" & 
+        "#initStackBottom();$n" &
+        "\tnim__datInit();$n" &
+        "\tsystemInit();$n" & 
         "$1" & 
         "$2"
     PosixNimMain = 
@@ -803,27 +804,27 @@ proc genMainProc(m: BModule) =
         "N_CDECL(void, NimMain)(void) {$n" &
         CommonMainBody & "}$n"
     PosixCMain = "int main(int argc, char** args, char** env) {$n" &
-        "  cmdLine = args;$n" & "  cmdCount = argc;$n" & "  gEnv = env;$n" &
-        "  NimMain();$n" & "  return nim_program_result;$n" & "}$n"
+        "\tcmdLine = args;$n" & "\tcmdCount = argc;$n" & "\tgEnv = env;$n" &
+        "\tNimMain();$n" & "\treturn nim_program_result;$n" & "}$n"
     StandaloneCMain = "int main(void) {$n" &
-        "  NimMain();$n" & 
-        "  return 0;$n" & "}$n"
+        "\tNimMain();$n" & 
+        "\treturn 0;$n" & "}$n"
     WinNimMain = "N_CDECL(void, NimMain)(void) {$n" &
         CommonMainBody & "}$n"
     WinCMain = "N_STDCALL(int, WinMain)(HINSTANCE hCurInstance, $n" &
         "                        HINSTANCE hPrevInstance, $n" &
         "                        LPSTR lpCmdLine, int nCmdShow) {$n" &
-        "  NimMain();$n" & "  return nim_program_result;$n" & "}$n"
+        "\tNimMain();$n" & "\treturn nim_program_result;$n" & "}$n"
     WinNimDllMain = "N_LIB_EXPORT N_CDECL(void, NimMain)(void) {$n" &
         CommonMainBody & "}$n"
     WinCDllMain = 
         "BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fwdreason, $n" &
-        "                    LPVOID lpvReserved) {$n" & "  NimMain();$n" &
-        "  return 1;$n" & "}$n"
+        "                    LPVOID lpvReserved) {$n" & "\tNimMain();$n" &
+        "\treturn 1;$n" & "}$n"
     PosixNimDllMain = WinNimDllMain
     PosixCDllMain = 
         "void NIM_POSIX_INIT NimMainInit(void) {$n" &
-        "  NimMain();$n}$n"
+        "\tNimMain();$n}$n"
   var nimMain, otherMain: TFormatStr
   if platform.targetOS == osWindows and
       gGlobalOptions * {optGenGuiApp, optGenDynLib} != {}: 
@@ -847,7 +848,7 @@ proc genMainProc(m: BModule) =
   inc(m.labels)
   appcg(m, m.s[cfsProcs], nimMain, [
         gBreakpoints, mainModInit, toRope(m.labels)])
-  if not (optNoMain in gGlobalOptions): 
+  if optNoMain notin gGlobalOptions:
     appcg(m, m.s[cfsProcs], otherMain, [])
   
 proc getInitName(m: PSym): PRope = 

lib/system.nim

@@ -1680,11 +1680,11 @@ when not defined(EcmaScript) and not defined(NimrodVM):
   when not defined(boehmgc) and not defined(useMalloc):
     proc initAllocator() {.inline.}
 
-  when not defined(nogc):
-    proc initStackBottom() {.inline.} = 
-      # WARNING: This is very fragile! An array size of 8 does not work on my
-      # Linux 64bit system. Very strange, but we are at the will of GCC's 
-      # optimizer...
+  proc initStackBottom() {.inline, compilerproc.} =
+    # WARNING: This is very fragile! An array size of 8 does not work on my
+    # Linux 64bit system. Very strange, but we are at the will of GCC's 
+    # optimizer...
+    when defined(setStackBottom):
       var locals {.volatile.}: pointer
       locals = addr(locals)
       setStackBottom(locals)

lib/system/gc.nim

@@ -639,6 +639,7 @@ when not defined(useNimRtl):
     else:
       var a = cast[TAddress](theStackBottom) # and not PageMask - PageSize*2
       var b = cast[TAddress](gch.stackBottom)
+      #c_fprintf(c_stdout, "old: %p new: %p;\n",gch.stackBottom,theStackBottom)
       when stackIncreases:
         gch.stackBottom = cast[pointer](min(a, b))
       else: