(C++) Boost.Program_options example 1: basics

Boost.Program_options example 1: basics is a Boost.Program_options example.

The example shows a (demonstration) program that responds to either '--help' or '--filename [my_filename]'.

Technical facts

Operating system(s) or programming environment(s)

Lubuntu 13.04 (raring)
Windows

IDE(s):

Qt Creator 2.7.0

Project type:

Console application

C++ standard:

C++98

Compiler(s):

G++ 4.7.3

Libraries used:

Boost: version 1.49
Qt: version 4.8.4 (32 bit)
STL: GNU ISO C++ Library, version 4.7.3

Qt project file: CppProgram_optionsExample1.pro


QT       += core

QT       -= gui

CONFIG   += console

CONFIG   -= app_bundle

TEMPLATE = app



unix {

  LIBS += -lboost_regex

}



win32 {

  #Boost.Program_options

  INCLUDEPATH += \

  ../../Libraries/boost_1_53_0



  SOURCES += main.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/winmain.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/variables_map.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/value_semantic.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/utf8_codecvt_facet.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/split.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/positional_options.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/parsers.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/options_description.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/convert.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/config_file.cpp \

    ../../Libraries/boost_1_53_0/libs/program_options/src/cmdline.cpp



}

main.cpp


#include <iostream>

#include <boost/program_options.hpp>



int main(int argc, char* argv[])

{

  // Declare the supported options.

  boost::program_options::options_description d("Allowed options for [my_program]");

  d.add_options()

      ("help",

        "produce this help message")

      ("filename",

         boost::program_options::value<std::string>(),

         "load from file 'arg'");



  boost::program_options::variables_map m;

  boost::program_options::store(

    boost::program_options::parse_command_line(

      argc, argv, d), m);

  boost::program_options::notify(m);



  //If one of the options is set to 'help'...

  if (m.count("help"))

  {

    //Display the options_description

    std::cout << d << "\n";

  }



  if (m.count("filename"))

  {

    std::cout

      << "Filename is set to '"

      << m["filename"].as<std::string>()

      << "'\n";

  }

  else

  {

    std::cout

      << "No filename set\n";

  }

}

crosscompiletowindows.sh


#!/bin/sh

#From http://richelbilderbeek.nl/CppQtCrosscompileToWindowsExample15.htm



echo "Cross compiling to Windows"



echo "1/2: Creating Windows makefile"

i686-pc-mingw32-qmake CppProgram_optionsExample1.pro



echo "2/2: making makefile"



make



echo "Done"

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