https://bugs.gentoo.org/560212
pull in headers for funcs that are used
--- a/libdm/dm_handle2path.c+++ b/libdm/dm_handle2path.c@@ -20,6 +20,9 @@#include <dmapi_kern.h>
#include "dmapi_lib.h"
+#include <fcntl.h> /* open */+#include <unistd.h> /* close */+#include <string.h> /* strlen */#include <mntent.h>
#include <dirent.h>
#ifdef linux