configure: fix link with librtmp when specifying path

Bug: https://curl.haxx.se/mail/lib-2017-06/0017.html

diff --git a/configure.ac b/configure.ac
index 014b56521c62b06b931662f7d775725ee1f474d9..d6d8156d0b07f8ea3266d49fcf3819a774018e34 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -2658,6 +2658,7 @@ if test X"$OPT_LIBRTMP" != Xno; then
     ;;
   *)
     dnl use the given --with-librtmp spot
+    LIB_RTMP="-lrtmp"
     PREFIX_RTMP=$OPT_LIBRTMP
     ;;
   esac