improved the interactive input handling if isocline is available

Makefile.in

@@ -174,7 +174,7 @@ am__DIST_COMMON = $(srcdir)/Makefile.in $(top_srcdir)/ac/ar-lib \
 	$(top_srcdir)/ac/compile $(top_srcdir)/ac/config.guess \
 	$(top_srcdir)/ac/config.sub $(top_srcdir)/ac/install-sh \
 	$(top_srcdir)/ac/ltmain.sh $(top_srcdir)/ac/missing README.md \
-	ac/ar-lib ac/compile ac/config.guess ac/config.sub \
+	ac/ar-lib ac/compile ac/config.guess ac/config.sub ac/depcomp \
 	ac/install-sh ac/ltmain.sh ac/missing
 DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST)
 distdir = $(PACKAGE)-$(VERSION)
@@ -260,6 +260,7 @@ INSTALL_DATA = @INSTALL_DATA@
 INSTALL_PROGRAM = @INSTALL_PROGRAM@
 INSTALL_SCRIPT = @INSTALL_SCRIPT@
 INSTALL_STRIP_PROGRAM = @INSTALL_STRIP_PROGRAM@
+ISOCLINE_LIBS = @ISOCLINE_LIBS@
 LD = @LD@
 LDFLAGS = @LDFLAGS@
 LIBM = @LIBM@