--- a/src/toplev.cc
+++ b/src/toplev.cc
@@ -666,12 +666,14 @@
   m ["F77"] = OCTAVE_CONF_F77;
   m ["FC"] = OCTAVE_CONF_FC;
   m ["FFLAGS"] = OCTAVE_CONF_FFLAGS;
+  m ["FFTW_LIBS"] = OCTAVE_CONF_FFTW_LIBS;
   m ["FLIBS"] = OCTAVE_CONF_FLIBS;
   m ["FORTRAN_MAIN_FLAG"] = OCTAVE_CONF_FORTRAN_MAIN_FLAG;
   m ["FPICFLAG"] = OCTAVE_CONF_FPICFLAG;
   m ["GLOB_INCFLAGS"] = OCTAVE_CONF_GLOB_INCFLAGS;
   m ["INCFLAGS"] = OCTAVE_CONF_INCFLAGS;
   m ["LDFLAGS"] = OCTAVE_CONF_LDFLAGS;
+  m ["LD_CXX"] = OCTAVE_CONF_LD_CXX;
   m ["LD_STATIC_FLAG"] = OCTAVE_CONF_LD_STATIC_FLAG;
   m ["LEX"] = OCTAVE_CONF_LEX;
   m ["LEXLIB"] = OCTAVE_CONF_LEXLIB;
@@ -682,12 +684,15 @@
   m ["LIBFLAGS"] = OCTAVE_CONF_LIBFLAGS;
   m ["LIBGLOB"] = OCTAVE_CONF_LIBGLOB;
   m ["LIBKPATHSEA"] = OCTAVE_CONF_LIBKPATHSEA;
+  m ["LIBOCT_PATHSEARCH"] = OCTAVE_CONF_LIBOCT_PATHSEARCH;
+  m ["LIBOCT_READLINE"] = OCTAVE_CONF_LIBOCT_READLINE;
   m ["LIBOCTAVE"] = OCTAVE_CONF_LIBOCTAVE;
   m ["LIBOCTINTERP"] = OCTAVE_CONF_LIBOCTINTERP;
   m ["LIBPLPLOT"] = OCTAVE_CONF_LIBPLPLOT;
   m ["LIBS"] = OCTAVE_CONF_LIBS;
   m ["LN_S"] = OCTAVE_CONF_LN_S;
   m ["MKOCTFILE_INCFLAGS"] = OCTAVE_CONF_MKOCTFILE_INCFLAGS;
+  m ["MKOCTFILE_LFLAGS"] = OCTAVE_CONF_MKOCTFILE_LFLAGS;
   m ["OCTAVE_LITE"] = OCTAVE_CONF_OCTAVE_LITE;
   m ["RANLIB"] = OCTAVE_CONF_RANLIB;
   m ["RDYNAMIC_FLAG"] = OCTAVE_CONF_RDYNAMIC_FLAG;