#include <errno.h>
#include <sys/param.h>
-const char mkdir_usage[] = "Usage: mkdir [OPTION] DIRECTORY...\n"
+static const char mkdir_usage[] = "Usage: mkdir [OPTION] DIRECTORY...\n"
"Create the DIRECTORY(ies), if they do not already exist\n\n"
"-m\tset permission mode (as in chmod), not rwxrwxrwx - umask\n"
"-p\tno error if existing, make parent directories as needed\n";