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-rw-r--r--malloc/malloc.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/malloc/malloc.c b/malloc/malloc.c
index 9c99c67..3d932db 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -493,6 +493,10 @@ do { \
#endif
+#ifndef LACKS_UNISTD_H
+# include <unistd.h>
+#endif
+
/*
Define HAVE_MMAP to optionally make malloc() use mmap() to
allocate very large blocks. These will be returned to the
@@ -500,7 +504,9 @@ do { \
*/
#ifndef HAVE_MMAP
-#define HAVE_MMAP 1
+# ifdef _POSIX_MAPPED_FILES
+# define HAVE_MMAP 1
+# endif
#endif
/*
@@ -541,10 +547,6 @@ do { \
bsd/gnu getpagesize.h
*/
-#ifndef LACKS_UNISTD_H
-# include <unistd.h>
-#endif
-
#ifndef malloc_getpagesize
# ifdef _SC_PAGESIZE /* some SVR4 systems omit an underscore */
# ifndef _SC_PAGE_SIZE