From c3ef7a528b1fdfe7fc98b846fd2ccb0c07443682 Mon Sep 17 00:00:00 2001
From: Jean Boussier <byroot@ruby-lang.org>
Date: Fri, 15 Sep 2023 23:08:59 +0200
Subject: [PATCH] Fix malloc_trim() on wasm32

```
compiling gc.c
gc.c:9746:5: error: implicit declaration of function 'malloc_trim' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    malloc_trim(0);
    ^
1 error generated.
```
---
 gc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gc.c b/gc.c
index aa74345405..ffbbee7115 100644
--- a/gc.c
+++ b/gc.c
@@ -48,7 +48,7 @@
 # endif
 #endif
 
-#ifdef HAVE_MALLOC_USABLE_SIZE
+#if defined(HAVE_MALLOC_USABLE_SIZE) || defined(HAVE_MALLOC_TRIM)
 # ifdef RUBY_ALTERNATIVE_MALLOC_HEADER
 /* Alternative malloc header is included in ruby/missing.h */
 # elif defined(HAVE_MALLOC_H)