2 files changed, 10 insertions, 0 deletions

diff --git a/umount.c b/umount.c
index 8565744f2..74638d21c 100644
--- a/umount.c
+++ b/umount.c
@@ -30,6 +30,11 @@
 #include <stdlib.h>
 #include "busybox.h"
 
+/* Teach libc5 about realpath -- it includes it but the 
+ * prototype is missing... */
+#if (__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1)
+extern char *realpath(const char *path, char *resolved_path);
+#endif
 
 static const int MNT_FORCE = 1;
 static const int MS_MGC_VAL = 0xc0ed0000; /* Magic number indicatng "new" flags */
diff --git a/util-linux/umount.c b/util-linux/umount.c
index 8565744f2..74638d21c 100644
--- a/util-linux/umount.c
+++ b/util-linux/umount.c
@@ -30,6 +30,11 @@
 #include <stdlib.h>
 #include "busybox.h"
 
+/* Teach libc5 about realpath -- it includes it but the 
+ * prototype is missing... */
+#if (__GLIBC__ <= 2) && (__GLIBC_MINOR__ < 1)
+extern char *realpath(const char *path, char *resolved_path);
+#endif
 
 static const int MNT_FORCE = 1;
 static const int MS_MGC_VAL = 0xc0ed0000; /* Magic number indicatng "new" flags */