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/*=========================================================================
Program: CMake - Cross-Platform Makefile Generator
Module: $RCSfile$
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) 2002 Kitware, Inc., Insight Consortium. All rights reserved.
See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#ifndef cmCMakePolicyCommand_h
#define cmCMakePolicyCommand_h
#include "cmCommand.h"
/** \class cmCMakePolicyCommand
* \brief Set how CMake should handle policies
*
* cmCMakePolicyCommand sets how CMake should deal with backwards
* compatibility policies.
*/
class cmCMakePolicyCommand : public cmCommand
{
public:
/**
* This is a virtual constructor for the command.
*/
virtual cmCommand* Clone()
{
return new cmCMakePolicyCommand;
}
/**
* This is called when the command is first encountered in
* the CMakeLists.txt file.
*/
virtual bool InitialPass(std::vector<std::string> const& args,
cmExecutionStatus &status);
/**
* This determines if the command is invoked when in script mode.
*/
virtual bool IsScriptable() { return true; }
/**
* The name of the command as specified in CMakeList.txt.
*/
virtual const char* GetName() {return "cmake_policy";}
/**
* Succinct documentation.
*/
virtual const char* GetTerseDocumentation()
{
return "Manage CMake policy settings.";
}
/**
* More documentation.
*/
virtual const char* GetFullDocumentation()
{
return
" cmake_policy(VERSION major.minor[.patch])\n"
"Specify that the current CMake list file is written for the "
"given version of CMake. "
"All policies introduced in the specified version or earlier "
"will be set NEW. "
"All policies introduced after the specified version will be set "
"to WARN, which is like OLD but also produces a warning. "
"This effectively requests behavior preferred as of a given CMake "
"version and tells newer CMake versions to warn about their new "
"policies. "
"The policy version specified must be at least 2.4 or the command "
"will report an error. "
"In order to get compatibility features supporting versions earlier "
"than 2.4 see documentation of policy CMP_0001."
"\n"
" cmake_policy(SET <CMP_NNNN> NEW)\n"
" cmake_policy(SET <CMP_NNNN> OLD)\n"
"Tell CMake to use the OLD or NEW behavior for a given policy. "
"Projects depending on the old behavior of a given policy may "
"silence a policy warning by setting the policy state to OLD. "
"Alternatively one may fix the project to work with the new behavior "
"and set the policy state to NEW."
"\n"
" cmake_policy(PUSH)\n"
" cmake_policy(POP)\n"
"Push and pop the current policy setting state on a stack. "
"Each PUSH must have a matching POP. "
"This is useful when mixing multiple projects, subprojects, and "
"files included from external projects that may each have been "
"written for a different version of CMake."
;
}
cmTypeMacro(cmCMakePolicyCommand, cmCommand);
private:
bool HandleSetMode(std::vector<std::string> const& args);
bool HandleVersionMode(std::vector<std::string> const& args);
};
#endif
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