--- a/util-linux/mount.c
+++ b/util-linux/mount.c
-@@ -42,6 +42,10 @@
- #define MS_DIRSYNC 128 /* Directory modifications are synchronous */
+@@ -77,6 +77,10 @@
+ # include <rpc/pmap_clnt.h>
#endif
+#ifndef MS_UNION
+
#if defined(__dietlibc__)
- /* 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
-@@ -152,6 +156,7 @@
+ // 16.12.2006, Sampo Kellomaki (sampo@iki.fi)
+@@ -194,6 +198,7 @@ static const int32_t mount_options[] = {
/* "rslave" */ MS_SLAVE|MS_RECURSIVE,
/* "rprivate" */ MS_SLAVE|MS_RECURSIVE,
/* "runbindable" */ MS_UNBINDABLE|MS_RECURSIVE,
)
// Always understood.
-@@ -206,6 +211,7 @@
- "rslave" "\0"
- "rprivate" "\0"
- "runbindable" "\0"
+@@ -249,6 +254,7 @@ static const char mount_option_str[] =
+ "rslave\0"
+ "rprivate\0"
+ "runbindable\0"
+ "union" "\0"
)