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[PATCH]: mem.c: make MAP_ANONYMOUS an alias to MAP_ANON (if not defined)

X-seq: zsh-workers 34451
From: "Jun T." <takimoto-j@xxxxxxxxxxxxxxxxx>
To: zsh-workers@xxxxxxx
Subject: [PATCH]: mem.c: make MAP_ANONYMOUS an alias to MAP_ANON (if not defined)
Date: Mon, 2 Feb 2015 23:28:21 +0900
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On Mac OS X, MAP_ANON is defined but MAP_ANONYMOUS is not,
resulting that mmap() is not used for allocating the zsh heap.
The following fixes this, although I'm not sure using malloc()
really leads to (higher probability of) memory fragmentation.


diff --git a/Src/mem.c b/Src/mem.c
index 7e0667a..b9569ea 100644
--- a/Src/mem.c
+++ b/Src/mem.c
@@ -79,6 +79,10 @@
 
 #include <sys/mman.h>
 
+#if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
+#define MAP_ANONYMOUS MAP_ANON
+#endif
+
 #if defined(MAP_ANONYMOUS) && defined(MAP_PRIVATE)
 
 #define USE_MMAP 1

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