Source/cmOptionCommand.cxx

   1 /*=========================================================================
   2
   3   Program:   CMake - Cross-Platform Makefile Generator
   4   Module:    $RCSfile: cmOptionCommand.cxx,v $
   5   Language:  C++
   6   Date:      $Date: 2008-01-23 15:27:59 $
   7   Version:   $Revision: 1.23 $
   8
   9   Copyright (c) 2002 Kitware, Inc., Insight Consortium.  All rights reserved.
  10   See Copyright.txt or http://www.cmake.org/HTML/Copyright.html for details.
  11
  12      This software is distributed WITHOUT ANY WARRANTY; without even
  13      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
  14      PURPOSE.  See the above copyright notices for more information.
  15
  16 =========================================================================*/
  17 #include "cmOptionCommand.h"
  18
  19 // cmOptionCommand
  20 bool cmOptionCommand
  21 ::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
  22 {
  23   bool argError = false;
  24   if(args.size() < 2)
  25     {
  26     argError = true;
  27     }
  28   // for VTK 4.0 we have to support the option command with more than 3
  29   // arguments if CMAKE_MINIMUM_REQUIRED_VERSION is not defined, if
  30   // CMAKE_MINIMUM_REQUIRED_VERSION is defined, then we can have stricter
  31   // checking.
  32   if(this->Makefile->GetDefinition("CMAKE_MINIMUM_REQUIRED_VERSION"))
  33     {
  34     if(args.size() > 3)
  35       {
  36       argError = true;
  37       }
  38     }
  39   if(argError)
  40     {
  41     std::string m = "called with incorrect number of arguments: ";
  42     for(size_t i =0; i < args.size(); ++i)
  43       {
  44       m += args[i];
  45       m += " ";
  46       }
  47     this->SetError(m.c_str());
  48     return false;
  49     }
  50
  51   std::string initialValue = "Off";
  52   // Now check and see if the value has been stored in the cache
  53   // already, if so use that value and don't look for the program
  54   cmCacheManager::CacheIterator it =
  55     this->Makefile->GetCacheManager()->GetCacheIterator(args[0].c_str());
  56   if(!it.IsAtEnd())
  57     {
  58     if ( it.GetType() != cmCacheManager::UNINITIALIZED )
  59       {
  60       it.SetProperty("HELPSTRING", args[1].c_str());
  61       return true;
  62       }
  63     if ( it.GetValue() )
  64       {
  65       initialValue = it.GetValue();
  66       }
  67     }
  68   if(args.size() == 3)
  69     {
  70     initialValue = args[2];
  71     }
  72   this->Makefile->AddCacheDefinition(args[0].c_str(),
  73     cmSystemTools::IsOn(initialValue.c_str()),
  74     args[1].c_str());
  75
  76   return true;
  77 }