PrgOptions shared_ptr usage, cnfcanon uncommented code

bin/cnfcanon.cpp

@@ -184,7 +184,6 @@ main(int argc, char *argv[])
    }
    SUBool::logs.mVerbLevel = conf->verbosity;
    dump_config(*conf, 1);
-#if 0
    SUBool::CNF cnf;
    int ret = input(*conf, &cnf);
    if (ret != 0)
@@ -196,6 +195,5 @@ main(int argc, char *argv[])
    canon->Compute();
    canon->PrintStatistics(2);
    output(*conf, canon->Cnf());
-#endif
    return 0;
 }

lib/prgutil.cpp

@@ -6,6 +6,8 @@
  * Utility functions and structures used in programs.
  */
 
+#include <boost/smart_ptr/make_shared.hpp>
+
 #include "prgutil.h"
 #include "version.h"
 
@@ -98,12 +100,12 @@ SUBool::PrgOptions::InitCommon()
 {
    mCommon.add_options()("help,h", "Print help")(
        "version,v", "Print version info");
-   boost::shared_ptr<po::option_description> opt_verbosity(
-       new po::option_description("verbosity,b",
+   auto opt_verbosity =
+       boost::make_shared<po::option_description>("verbosity,b",
            po::value<unsigned>(&mVerbosity)->default_value(mVerbosity),
            "Verbosity level of the log which is written to standard output."
            " 0 means no log is written, however, messages of glucose can still "
-           "appear."));
+           "appear.");
    mCommon.add(opt_verbosity);
    if (mUseConfigFile)
    {