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Gflags

The gflags package contains a library that implements commandline flags processing. As such it's a replacement for getopt(). It has increased flexibility, including built-in support for C++ types like string, and the ability to define flags in the source file in which they're used.

Simple example 

#include <iostream>
#include <gflags/gflags.h>

DEFINE_bool(verbose, false, "Display program name before message");
DEFINE_string(message, "Hello world!", "Message to print");

int main(int argc, char *argv[])
{
  gflags::SetUsageMessage("some usage message");
  gflags::SetVersionString("1.0.0");
  gflags::ParseCommandLineFlags(&argc, &argv, true);
  if (FLAGS_verbose) std::cout << gflags::ProgramInvocationShortName() << ": ";
  std::cout << FLAGS_message << std::endl;
  gflags::ShutDownCommandLineFlags();
  return 0;
}

Local Download

gflags 2.1.2
Gflags-2.1.2.tar.gz
gflags 2.2.0
Gflags-2.2.0.tar.gz

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