App namespace should be duck, not mc. That's for the lib.

src/gui/command_line.cpp

@@ -20,7 +20,7 @@
 #include "app_config.h"
 #include <cxxopts.hpp>
 
-namespace mc {
+namespace duck {
 CommandLineResult::CommandLineResult() :
 	should_quit(false)
 {
@@ -54,4 +54,4 @@ CommandLineResult parse_command_line (int argc, char* argv[]) {
 
 	return retval;
 }
-} //namespace mc
+} //namespace duck

src/gui/command_line.hpp

@@ -17,7 +17,7 @@
 
 #pragma once
 
-namespace mc {
+namespace duck {
 	struct CommandLineResult {
 		CommandLineResult();
 
@@ -25,4 +25,4 @@ namespace mc {
 	};
 
 	CommandLineResult parse_command_line (int argc, char* argv[]);
-} //namespace mc
+} //namespace duck

src/gui/main.cpp

@@ -31,11 +31,11 @@ int main(int argc, char* argv[]) {
 	std::cout << "Starting program\n";
 #endif
 
-	auto command = mc::parse_command_line(argc, argv);
+	auto command = duck::parse_command_line(argc, argv);
 	if (command.should_quit)
 		return 0;
 
-	const int retval = mc::run_gui(g_def_icon_size, g_def_icon_fps);
+	const int retval = duck::run_gui(g_def_icon_size, g_def_icon_fps);
 
 #if !defined(NDEBUG)
 	std::cout << "Leaving program with return code " << retval << '\n';

src/gui/main_window.cpp

@@ -6,7 +6,7 @@
 #include <iostream>
 #include <fstream>
 
-namespace mc {
+namespace duck {
 MainWindow::MainWindow (int icon_size, int icon_fps, const std::string& caption) :
 	m_grid1(*this, 3, true),
 	m_grid2(*this, 3, true),
@@ -61,4 +61,4 @@ void MainWindow::init_menu() {
 		win.modality();
 	});
 }
-} //namespace mc
+} //namespace duck

src/gui/main_window.hpp

@@ -6,7 +6,8 @@
 #include <nana/gui/widgets/menubar.hpp>
 #include <string>
 
-namespace mc {
+namespace duck {
+
 class MainWindow : public nana::form {
 public:
 	MainWindow (int icon_size, int icon_fps, const std::string& caption);
@@ -23,4 +24,4 @@ private:
 	int m_icon_size;
 	int m_icon_fps;
 };
-} //namespace mc
+} //namespace duck

src/gui/run_gui.cpp

@@ -2,7 +2,7 @@
 #include "main_window.hpp"
 #include "app_config.h"
 
-namespace mc {
+namespace duck {
 int run_gui(int icon_size, int icon_fps) {
 	MainWindow win(icon_size, icon_fps, APP_NAME);
 	win.show();
@@ -10,4 +10,4 @@ int run_gui(int icon_size, int icon_fps) {
 	nana::exec();
 	return 0;
 }
-} //namespace mc
+} //namespace duck

src/gui/run_gui.hpp

@@ -1,5 +1,5 @@
 #pragma once
 
-namespace mc {
+namespace duck {
 int run_gui(int icon_size, int icon_fps);
-} //namespace mc
+} //namespace duck

src/gui/version_window.cpp

@@ -4,7 +4,7 @@
 #include "git_version.h"
 #include <string>
 
-namespace mc {
+namespace duck {
 namespace {
 	const constexpr char g_gpl_text[] =
 		APP_SHORT_DESC "\n"
@@ -70,4 +70,4 @@ VersionWindow::VersionWindow(nana::window owner) :
 	this->collocate();
 }
 
-} //namespace mc
+} //namespace duck

src/gui/version_window.hpp

@@ -5,7 +5,7 @@
 #include <nana/gui/widgets/label.hpp>
 #include <nana/gui/widgets/textbox.hpp>
 
-namespace mc {
+namespace duck {
 class VersionWindow : public nana::form {
 public:
 	VersionWindow(nana::window owner);
@@ -20,4 +20,4 @@ private:
 	nana::textbox m_main_text;
 	nana::button m_close;
 };
-} //namespace mc
+} //namespace duck