-AC_CHECK_FUNCS(mmap waitpid getcwd strdup strerror chown chmod mknod)
-AC_CHECK_FUNCS(fchmod fstat bcopy bzero readlink link utime utimes)
+AC_CHECK_FUNCS(mmap munmap waitpid getcwd strdup strerror chown chmod mknod)
+AC_CHECK_FUNCS(fchmod fstat strchr bcopy bzero readlink link utime utimes)