CMake/Source/cmOptionCommand.cxx

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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
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Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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This software is distributed WITHOUT ANY WARRANTY; without even the
implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the License for more information.
============================================================================*/
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#include "cmOptionCommand.h"
// cmOptionCommand
bool cmOptionCommand
::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
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{
bool argError = false;
if(args.size() < 2)
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{
argError = true;
}
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// for VTK 4.0 we have to support the option command with more than 3
// arguments if CMAKE_MINIMUM_REQUIRED_VERSION is not defined, if
// CMAKE_MINIMUM_REQUIRED_VERSION is defined, then we can have stricter
// checking.
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if(this->Makefile->GetDefinition("CMAKE_MINIMUM_REQUIRED_VERSION"))
{
if(args.size() > 3)
{
argError = true;
}
}
if(argError)
{
std::string m = "called with incorrect number of arguments: ";
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for(size_t i =0; i < args.size(); ++i)
{
m += args[i];
m += " ";
}
this->SetError(m);
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return false;
}
std::string initialValue = "Off";
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// Now check and see if the value has been stored in the cache
// already, if so use that value and don't look for the program
cmCacheManager::CacheIterator it =
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this->Makefile->GetCacheManager()->GetCacheIterator(args[0].c_str());
if(!it.IsAtEnd())
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{
if ( it.GetType() != cmCacheManager::UNINITIALIZED )
{
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it.SetProperty("HELPSTRING", args[1].c_str());
return true;
}
initialValue = it.GetValue();
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}
if(args.size() == 3)
{
initialValue = args[2];
}
bool init = cmSystemTools::IsOn(initialValue.c_str());
this->Makefile->AddCacheDefinition(args[0], init? "ON":"OFF",
args[1].c_str(), cmCacheManager::BOOL);
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return true;
}