message: [Build] Add compile/link summary to configure
  This adds a summary of compiler and linker flags, as well as information
  about which features are enabled/disabled to the end of the configure
  script.
  Doesn't change any functionality, and is strictly informational.
diff: @@ -1034,3 +1034,28 @@ case $host in
  chmod 755 libtool
  ;;
  esac
  +
  +echo
  +echo "Options used to compile and link:"
  +echo " with wallet = $enable_wallet"
  +echo " with gui / qt = $bitcoin_enable_qt"
  +if test x$bitcoin_enable_qt != xno; then
  + echo " qt version = $bitcoin_qt_got_major_vers"
  + echo " with qr = $use_qr"
  +fi
  +echo " with zmq = $use_zmq"
  +echo " with test = $use_tests"
  +dnl echo " with bench = $use_bench"
  +echo " with upnp = $use_upnp"
  +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
  