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diff --git a/tiger-compiler/src/task/task-register.hh b/tiger-compiler/src/task/task-register.hh
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+/**
+ ** \file task/task-register.hh
+ ** \brief Declare the task::TaskRegister class.
+ **
+ */
+
+#pragma once
+
+#include <iosfwd>
+#include <map>
+#include <string>
+#include <vector>
+
+#include <boost/program_options.hpp>
+
+#include <misc/timer.hh>
+#include <task/fwd.hh>
+
+namespace task
+{
+  /** \brief Register Tasks.
+
+  The purpose of the TaskRegister class is to collect tasks
+  and organize their execution using their dependencies (like 'make').
+  For modeling details, see Design Patterns: singleton.
+  */
+  class TaskRegister
+  {
+    // Make it non-copyable.
+    TaskRegister(const TaskRegister&) = delete;
+    TaskRegister& operator=(const TaskRegister&) = delete;
+
+    /// \name Ctor & dtor.
+  private:
+    /// Construct a TaskRegister.
+    TaskRegister() = default;
+
+  public:
+    /// Access to the unique TaskRegister.
+    static TaskRegister& instance();
+
+    /** \name Tasks registering.
+     ** \{ */
+    /// Register task \a task.
+    void register_task(const SimpleTask& task);
+    void register_task(const ArgumentTask& task);
+    /// Register the task \a task_name for execution.
+    void enable_task(const std::string& task_name);
+
+    /// Return the number of tasks to execute.
+    int nb_of_task_to_execute_get();
+    /** \} */
+
+    /// \name Task reordering.
+  private:
+    /** \brief Resolve dependencies between tasks.
+     **
+     ** Resolve dependencies on tasks registered for execution.
+     ** Make a depth first search of implicit tasks graph,
+     ** check cycles and build an ordered list of tasks. */
+    void resolve_dependencies(const Task& task);
+
+  public:
+    /** \brief Parse \a argv and determine which tasks to execute.
+     **
+     ** Use boost::program_options. */
+    char* parse_arg(int argc, char* argv[]);
+
+    /** \name Display TaskRegister content.
+     ** \{ */
+    /// Display registered Tasks.
+    std::ostream& print_task_list(std::ostream& ostr);
+    /// Display task graph.
+    std::ostream& print_task_graph(std::ostream& ostr);
+    /// Display registered Tasks execution order.
+    std::ostream& print_task_order(std::ostream& ostr);
+
+    /** \name Using registered Tasks.
+     ** \{ */
+    /// Execute tasks, checking dependencies.
+    void execute();
+    /** \} */
+
+    /** \name Time management.
+     ** \{ */
+    /// Access to the tasks timer.
+    const misc::timer& timer_get() const;
+    /** \} */
+
+    /// Ordered vector of tasks.
+    using tasks_list_type = std::vector<const Task*>;
+
+  private:
+    /// Associate a task name to a task.
+    using tasks_by_name_type = std::map<const std::string, Task const*>;
+    /// Associate a module name to a task module.
+    using indexed_module_type =
+      std::map<const std::string, boost::program_options::options_description>;
+
+    // Common code between the two overload of `register_task'.
+    indexed_module_type::iterator register_task_(const Task& task);
+
+    /// 'string to task' map.
+    tasks_by_name_type task_list_;
+
+    /// 'ordered for execution' tasks list.
+    tasks_list_type task_order_;
+
+    /// Tasks timer.
+    misc::timer timer_;
+
+    /// Task modules.
+    indexed_module_type modules_;
+  };
+
+} // namespace task
+
+#include <task/task-register.hxx>