From e68a91c8dfd86933deed87b75f9a4cbb6e8a2f39 Mon Sep 17 00:00:00 2001
From: ringabout <43030857+ringabout@users.noreply.github.com>
Date: Tue, 25 Mar 2025 05:52:43 +0800
Subject: [PATCH] fixes usenimrtl with `useMalloc` (#24804)

Follow up https://github.com/nim-lang/Nim/pull/19512

ref https://github.com/nim-lang/Nim/issues/24794

Otherwise, `/Users/blue/Desktop/Nim/lib/system/mm/malloc.nim(4, 1)
Error: redefinition of 'allocImpl'; previous declaration here:
/Users/blue/Desktop/Nim/lib/system/memalloc.nim(51, 8)`

In `proc allocImpl*(size: Natural): pointer {.noconv, rtl, tags: [],
benign, raises: [].}`, `rtl` means it is an `importc` function instead
of a proc forward decl.

(cherry picked from commit d15705e05b166077634a6caa96808d34af1f5d5b)
---
 lib/system/mmdisp.nim | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/system/mmdisp.nim b/lib/system/mmdisp.nim
index 26f2f0bbf0..de82c0fb47 100644
--- a/lib/system/mmdisp.nim
+++ b/lib/system/mmdisp.nim
@@ -55,7 +55,8 @@ elif defined(gogc):
   include system / mm / go
 
 elif (defined(nogc) or defined(gcDestructors)) and defined(useMalloc):
-  include system / mm / malloc
+  when not defined(useNimRtl):
+    include system / mm / malloc
 
   when defined(nogc):
     proc GC_getStatistics(): string = ""