AC_FUNC_VFORK
AC_CHECK_LIB(mkstemp,mkstemp)
AC_CHECK_FUNCS(waitpid wait3 sigaction sigprocmask sigblock sigsetmask \
- sighold sigrelse writev lstat uname tzset killpg mkstemp \
+ sighold sigrelse lstat uname tzset killpg mkstemp \
getutent nl_langinfo mbtowc wcwidth)
dnl sigsetjmp may be a macro