-AC_CHECK_FUNCS(waitpid wait4 getcwd strdup strerror chown chmod mknod mkfifo \
- fchmod fstat strchr readlink link utime utimes strftime mtrace ftruncate \
+AC_CHECK_FUNCS(waitpid wait4 getcwd strdup chown chmod lchmod mknod mkfifo \
+ fchmod fstat ftruncate strchr readlink link utime utimes lutimes strftime \