From 87a8bc6557125f5566536d6f0825ed975e616439 Mon Sep 17 00:00:00 2001
From: Jacek Sieka <arnetheduck@gmail.com>
Date: Mon, 7 Mar 2016 22:02:24 +0800
Subject: [PATCH] fix return type of munmap

---
 lib/system/alloc.nim | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/lib/system/alloc.nim b/lib/system/alloc.nim
index 67d380391a..ff3e42fa14 100644
--- a/lib/system/alloc.nim
+++ b/lib/system/alloc.nim
@@ -49,7 +49,7 @@ when defined(emscripten):
   proc mmap(adr: pointer, len: int, prot, flags, fildes: cint,
             off: int): pointer {.header: "<sys/mman.h>".}
 
-  proc munmap(adr: pointer, len: int) {.header: "<sys/mman.h>".}
+  proc munmap(adr: pointer, len: int): cint {.header: "<sys/mman.h>".}
 
   proc osAllocPages(block_size: int): pointer {.inline.} =
     let realSize = block_size + sizeof(EmscriptenMMapBlock) + PageSize + 1
@@ -78,7 +78,7 @@ when defined(emscripten):
   proc osDeallocPages(p: pointer, size: int) {.inline} =
     var mmapDescrPos = cast[ByteAddress](p) -% sizeof(EmscriptenMMapBlock)
     var mmapDescr = cast[EmscriptenMMapBlock](mmapDescrPos)
-    munmap(mmapDescr.realPointer, mmapDescr.realSize)
+    discard munmap(mmapDescr.realPointer, mmapDescr.realSize)
 
 elif defined(posix):
   const
@@ -97,7 +97,7 @@ elif defined(posix):
   proc mmap(adr: pointer, len: int, prot, flags, fildes: cint,
             off: int): pointer {.header: "<sys/mman.h>".}
 
-  proc munmap(adr: pointer, len: int) {.header: "<sys/mman.h>".}
+  proc munmap(adr: pointer, len: int): cint {.header: "<sys/mman.h>".}
 
   proc osAllocPages(size: int): pointer {.inline.} =
     result = mmap(nil, size, PROT_READ or PROT_WRITE,
@@ -106,7 +106,7 @@ elif defined(posix):
       raiseOutOfMem()
 
   proc osDeallocPages(p: pointer, size: int) {.inline} =
-    when reallyOsDealloc: munmap(p, size)
+    when reallyOsDealloc: discard munmap(p, size)
 
 elif defined(windows):
   const