CMake/Source/cmSubdirDependsCommand.h

/*=========================================================================

  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile$
  Language:  C++
  Date:      $Date$
  Version:   $Revision$

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=========================================================================*/
#ifndef cmSubdirDependsCommand_h
#define cmSubdirDependsCommand_h

#include "cmStandardIncludes.h"
#include "cmCommand.h"

/** \class cmSubdirDependsCommand
 * \brief Specify a set of subdirectories which must be built before the
 * given subdirectory.
 *
 * cmSubdirDependsCommand specifies for one entry of a SUBDIRS command
 * a set of the other entries that must be built before it.  CMake
 * will still walk the subdirectories in the order in which they
 * appear in a SUBDIRS command, but the generated makefiles will be
 * setup to be sure one directory is finished before another begins.
 * This allows parallel builds to work correctly.
 */
class cmSubdirDependsCommand : public cmCommand
{
public:
  /**
   * This is a virtual constructor for the command.
   */
  virtual cmCommand* Clone() 
    {
    return new cmSubdirDependsCommand;
    }

  /**
   * This is called when the command is first encountered in
   * the CMakeLists.txt file.
   */
  virtual bool InitialPass(std::vector<std::string>& args);

  /**
   * The name of the command as specified in CMakeList.txt.
   */
  virtual const char* GetName() { return "SUBDIR_DEPENDS";}

  /**
   * Succinct documentation.
   */
  virtual const char* GetTerseDocumentation() 
    {
    return "Add a set of subdirectories on which another subdirectory depends.";
    }
  
  /**
   * More documentation.
   */
  virtual const char* GetFullDocumentation()
    {
    return
      "SUBDIR_DEPENDS(subdir dep1 dep2 ...)\n"
      "Add a set of subdirectories on which \"subdir\" depends.\n"
      "This sets up the generated makefiles to build the subdirectries dep1, "
      "dep2, ... before \"subdir\" itself.";
    }
  
  cmTypeMacro(cmSubdirDependsCommand, cmCommand);
};



#endif