From 7c879d9b0fada910bf6afc0a64d327f318a829de Mon Sep 17 00:00:00 2001
From: Andreas Rumpf <rumpf_a@web.de>
Date: Sat, 14 Apr 2018 13:57:27 +0200
Subject: [PATCH] explicit effects for existsOrCreateDir

---
 lib/pure/os.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/pure/os.nim b/lib/pure/os.nim
index c06a9bd796..a77bee99da 100644
--- a/lib/pure/os.nim
+++ b/lib/pure/os.nim
@@ -925,7 +925,8 @@ proc rawCreateDir(dir: string): bool =
     else:
       raiseOSError(osLastError())
 
-proc existsOrCreateDir*(dir: string): bool =
+proc existsOrCreateDir*(dir: string): bool {.rtl, extern: "nos$1",
+  tags: [WriteDirEffect, ReadDirEffect].} =
   ## Check if a `directory`:idx: `dir` exists, and create it otherwise.
   ##
   ## Does not create parent directories (fails if parent does not exist).