AC_C_CONST
-AC_CHECK_FUNCS(setpgid sbrk sigaction isascii bzero bcopy btowc poll)
+AC_CHECK_FUNCS(setpgid sbrk sigaction isascii bzero bcopy btowc poll sigprocmask)
AC_FUNC_ALLOCA
AC_CHECK_LIB(socket, socketpair)
mv -f Makefile.tmp Makefile
changequote([,])dnl
+
case x$CONFIG_HEADERS in
xconfig.h:config.in)
echo > stamp-h ;;