AC_CHECK_FUNCS(chdir strerror getlogin gethostname kill link symlink perror)
AC_CHECK_FUNCS(sleep time ttyname signal alarm ctime clock access fork execl)
AC_CHECK_FUNCS(wait setmode execvp pipe dup2 close fdopen strcasestr getrlimit)
-AC_CHECK_FUNCS(gettimeofday stat fstat lstat getpwuid vsnprintf)
+AC_CHECK_FUNCS(gettimeofday stat fstat lstat getpwuid vsnprintf dup getcwd)
# Check for glibc backtrace functions
AC_CHECK_FUNCS(backtrace backtrace_symbols)