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-rw-r--r--mach-defpager/kalloc.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/mach-defpager/kalloc.c b/mach-defpager/kalloc.c
index 28c0b55e..5d91aceb 100644
--- a/mach-defpager/kalloc.c
+++ b/mach-defpager/kalloc.c
@@ -40,7 +40,13 @@ static void init_hook (void);
static void *malloc_hook (size_t size, const void *caller);
static void free_hook (void *ptr, const void *caller);
-void (*__malloc_initialize_hook) (void) = init_hook;
+/* GNU libc 2.14 defines this macro to declare hook variables as volatile.
+ Define it as empty for older libc versions. */
+#ifndef __MALLOC_HOOK_VOLATILE
+# define __MALLOC_HOOK_VOLATILE
+#endif
+
+void (*__MALLOC_HOOK_VOLATILE __malloc_initialize_hook) (void) = init_hook;
#define DEBUG