140 lines
4.0 KiB
C++
140 lines
4.0 KiB
C++
/*============================================================================
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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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#include "cmCMakeMinimumRequired.h"
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#include "cmVersion.h"
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// cmCMakeMinimumRequired
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bool cmCMakeMinimumRequired
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::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
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{
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// Process arguments.
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std::string version_string;
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bool doing_version = false;
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for(unsigned int i=0; i < args.size(); ++i)
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{
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if(args[i] == "VERSION")
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{
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doing_version = true;
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}
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else if(args[i] == "FATAL_ERROR")
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{
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if(doing_version)
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{
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this->SetError("called with no value for VERSION.");
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return false;
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}
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doing_version = false;
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}
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else if(doing_version)
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{
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doing_version = false;
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version_string = args[i];
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}
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else
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{
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this->UnknownArguments.push_back(args[i]);
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}
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}
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if(doing_version)
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{
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this->SetError("called with no value for VERSION.");
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return false;
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}
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// Make sure there was a version to check.
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if(version_string.empty())
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{
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return this->EnforceUnknownArguments();
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}
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// Save the required version string.
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this->Makefile->AddDefinition("CMAKE_MINIMUM_REQUIRED_VERSION",
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version_string.c_str());
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// Get the current version number.
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int current_major = cmVersion::GetMajorVersion();
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int current_minor = cmVersion::GetMinorVersion();
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int current_patch = cmVersion::GetPatchVersion();
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int current_tweak = cmVersion::GetTweakVersion();
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// Parse at least two components of the version number.
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// Use zero for those not specified.
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int required_major = 0;
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int required_minor = 0;
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int required_patch = 0;
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int required_tweak = 0;
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if(sscanf(version_string.c_str(), "%u.%u.%u.%u",
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&required_major, &required_minor,
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&required_patch, &required_tweak) < 2)
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{
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cmOStringStream e;
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e << "could not parse VERSION \"" << version_string.c_str() << "\".";
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this->SetError(e.str().c_str());
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return false;
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}
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// Compare the version numbers.
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if((current_major < required_major) ||
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(current_major == required_major &&
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current_minor < required_minor) ||
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(current_major == required_major &&
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current_minor == required_minor &&
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current_patch < required_patch) ||
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(current_major == required_major &&
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current_minor == required_minor &&
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current_patch == required_patch &&
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current_tweak < required_tweak))
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{
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// The current version is too low.
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cmOStringStream e;
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e << "CMake " << version_string.c_str()
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<< " or higher is required. You are running version "
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<< cmVersion::GetCMakeVersion();
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this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
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cmSystemTools::SetFatalErrorOccured();
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return true;
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}
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// The version is not from the future, so enforce unknown arguments.
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if(!this->EnforceUnknownArguments())
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{
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return false;
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}
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if (required_major < 2 || (required_major == 2 && required_minor < 4))
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{
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this->Makefile->SetPolicyVersion("2.4");
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}
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else
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{
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this->Makefile->SetPolicyVersion(version_string.c_str());
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}
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return true;
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}
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//----------------------------------------------------------------------------
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bool cmCMakeMinimumRequired::EnforceUnknownArguments()
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{
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if(!this->UnknownArguments.empty())
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{
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cmOStringStream e;
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e << "called with unknown argument \""
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<< this->UnknownArguments[0] << "\".";
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this->SetError(e.str().c_str());
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return false;
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}
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return true;
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}
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