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80 lines
2.1 KiB
80 lines
2.1 KiB
/*============================================================================
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CMake - Cross Platform Makefile Generator
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Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
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see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the License for more information.
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============================================================================*/
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#ifndef cmUnsetCommand_h
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#define cmUnsetCommand_h
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#include "cmCommand.h"
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/** \class cmUnsetCommand
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* \brief Unset a CMAKE variable
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*
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* cmUnsetCommand unsets or removes a variable.
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*/
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class cmUnsetCommand : public cmCommand
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{
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public:
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/**
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* This is a virtual constructor for the command.
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*/
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virtual cmCommand* Clone()
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{
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return new cmUnsetCommand;
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}
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/**
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* This is called when the command is first encountered in
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* the CMakeLists.txt file.
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*/
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virtual bool InitialPass(std::vector<std::string> const& args,
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cmExecutionStatus &status);
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/**
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* This determines if the command is invoked when in script mode.
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*/
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virtual bool IsScriptable() { return true; }
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/**
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* The name of the command as specified in CMakeList.txt.
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*/
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virtual const char* GetName() {return "unset";}
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/**
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* Succinct documentation.
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*/
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virtual const char* GetTerseDocumentation()
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{
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return "Unset a variable, cache variable, or environment variable.";
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}
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/**
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* More documentation.
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*/
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virtual const char* GetFullDocumentation()
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{
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return
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" unset(<variable> [CACHE])\n"
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"Removes the specified variable causing it to become undefined. "
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"If CACHE is present then the variable is removed from the cache "
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"instead of the current scope.\n"
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"<variable> can be an environment variable such as:\n"
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" unset(ENV{LD_LIBRARY_PATH})\n"
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"in which case the variable will be removed from the current "
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"environment.";
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}
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cmTypeMacro(cmUnsetCommand, cmCommand);
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};
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#endif
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