add --disable-cpplibs configure option (SF#1723295: https://sourceforge.net/tracker/index.php?func=detail&aid=1723295&group_id=13478&atid=313478
diff --git a/configure.in b/configure.in
index 9bbae79..effd1f4 100644
--- a/configure.in
+++ b/configure.in
@@ -230,6 +230,16 @@
fi
AM_CONDITIONAL(FLaC__HAS_XMMS, test -n "$XMMS_INPUT_PLUGIN_DIR")
+dnl build FLAC++ or not
+AC_ARG_ENABLE([cpplibs],
+AC_HELP_STRING([--disable-cpplibs], [Do not build libFLAC++]),
+[case "${enableval}" in
+ yes) disable_cpplibs=false ;;
+ no) disable_cpplibs=true ;;
+ *) AC_MSG_ERROR(bad value ${enableval} for --enable-cpplibs) ;;
+esac], [disable_cpplibs=false])
+AM_CONDITIONAL(FLaC__WITH_CPPLIBS, [test "x$disable_cpplibs" != xtrue])
+
dnl check for ogg library
AC_ARG_ENABLE([ogg],
AC_HELP_STRING([--disable-ogg], [Disable ogg support (default: test for libogg)]),