When libidn is detected without explicitly told to, we provide -L/lib and

-I/include options. Not anymore.

configure.ac

@@ -968,7 +968,9 @@ case "$LIBIDN" in
 
        idn=""
        dnl if there is a given path, check that FIRST
+       if test -n "$LIBIDN"; then
          if test "x$LIBIDN" != "xyes"; then
+            AC_MSG_WARN([moo moo $LIBIDN])
             oldLDFLAGS=$LDFLAGS
             oldCPPFLAGS=$CPPFLAGS
             LDFLAGS="$LDFLAGS -L$LIBIDN/lib"
@@ -979,6 +981,7 @@ case "$LIBIDN" in
                          LDFLAGS=$oldLDFLAGS
                          CPPFLAGS=$oldCPPFLAGS)
          fi
+       fi
 
        if test "x$idn" != "xyes"; then
           dnl check with default paths