Use boost.program_options to handle command line arguments in eth and ethkey

Author: demon1999

eth/CMakeLists.txt

@@ -8,7 +8,7 @@ set(
 add_executable(eth ${sources})
 target_link_libraries(
     eth
-    PRIVATE ethereum ethashseal evm web3jsonrpc webthree devcore
+    PRIVATE ethereum ethashseal evm web3jsonrpc webthree devcore Boost::program_options
 )
 
 target_include_directories(eth PRIVATE ../utils)

eth/MinerAux.h

@@ -101,8 +101,9 @@ class MinerCLI
 		BasicAuthority::init();
 	}
 
-	bool interpretOption(int& i, int argc, char** argv)
+	bool interpretOption(size_t& i, vector<string> const& argv)
 	{
+		size_t argc = argv.size();
 		string arg = argv[i];
 		if (arg == "--benchmark-warmup" && i + 1 < argc)
 			try {