Add compile and link options echo to configure

configure.ac

@@ -876,3 +876,21 @@ case $host in
      chmod 755 libtool
    ;;
 esac
+
+echo 
+echo "Options used to compile and link:"
+echo "  with wallet   = $enable_wallet"
+echo "  with zmq      = $use_zmq"
+echo "  with test     = $use_tests"
+echo "  debug enabled = $enable_debug"
+echo 
+echo "  target os     = $TARGET_OS"
+echo "  build os      = $BUILD_OS"
+echo
+echo "  CC            = $CC"
+echo "  CFLAGS        = $CFLAGS"
+echo "  CPPFLAGS      = $CPPFLAGS"
+echo "  CXX           = $CXX"
+echo "  CXXFLAGS      = $CXXFLAGS"
+echo "  LDFLAGS       = $LDFLAGS"
+echo