--- ./lib/configure.orig	2019-01-24 22:44:34.406570275 +0100
+++ ./lib/configure	2019-01-24 22:46:51.853235913 +0100
@@ -28,7 +28,7 @@
 echo "LIBS = -ldl \\" >Make.libs
     
 rm -f a.out
-c++ test_readline.cc $CXXFLAGS $CPPFLAGS $LDFLAGS -lreadline
+$CXX test_readline.cc $CXXFLAGS $CPPFLAGS $LDFLAGS -lreadline
 if [ -f a.out ] ; then
     echo "using readline"
     echo "-DHAVE_LIBREADLINE \\" >>Make.ccflags
@@ -46,10 +46,10 @@
 cat <<CAT_EOF >Make.sys
 #------------------------------------------------------------------------
 VPATH = .:..
-CCC = c++
+CCC = \$(CXX)
 TARGET_EXT = .so
 
-LDFLAGS = -shared
+LDFLAGS += -shared
 
 .SUFFIXES:
 .SUFFIXES: .o .cc