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/*============================================================================
CMake - Cross Platform Makefile Generator
Copyright 2000-2009 Kitware, Inc., Insight Software Consortium
Distributed under the OSI-approved BSD License (the "License");
see accompanying file Copyright.txt for details.
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.
============================================================================*/
#include "cmCMakeMinimumRequired.h"
#include "cmVersion.h"
// cmCMakeMinimumRequired
bool cmCMakeMinimumRequired
::InitialPass(std::vector<std::string> const& args, cmExecutionStatus &)
{
// Process arguments.
std::string version_string;
bool doing_version = false;
for(unsigned int i=0; i < args.size(); ++i)
{
if(args[i] == "VERSION")
{
doing_version = true;
}
else if(args[i] == "FATAL_ERROR")
{
if(doing_version)
{
this->SetError("called with no value for VERSION.");
return false;
}
doing_version = false;
}
else if(doing_version)
{
doing_version = false;
version_string = args[i];
}
else
{
this->UnknownArguments.push_back(args[i]);
}
}
if(doing_version)
{
this->SetError("called with no value for VERSION.");
return false;
}
// Make sure there was a version to check.
if(version_string.empty())
{
return this->EnforceUnknownArguments();
}
// Save the required version string.
this->Makefile->AddDefinition("CMAKE_MINIMUM_REQUIRED_VERSION",
version_string.c_str());
// Get the current version number.
int current_major = cmVersion::GetMajorVersion();
int current_minor = cmVersion::GetMinorVersion();
int current_patch = cmVersion::GetPatchVersion();
int current_tweak = cmVersion::GetTweakVersion();
// Parse at least two components of the version number.
// Use zero for those not specified.
int required_major = 0;
int required_minor = 0;
int required_patch = 0;
int required_tweak = 0;
if(sscanf(version_string.c_str(), "%u.%u.%u.%u",
&required_major, &required_minor,
&required_patch, &required_tweak) < 2)
{
cmOStringStream e;
e << "could not parse VERSION \"" << version_string.c_str() << "\".";
this->SetError(e.str().c_str());
return false;
}
// Compare the version numbers.
if((current_major < required_major) ||
(current_major == required_major &&
current_minor < required_minor) ||
(current_major == required_major &&
current_minor == required_minor &&
current_patch < required_patch) ||
(current_major == required_major &&
current_minor == required_minor &&
current_patch == required_patch &&
current_tweak < required_tweak))
{
// The current version is too low.
cmOStringStream e;
e << "CMake " << version_string.c_str()
<< " or higher is required. You are running version "
<< cmVersion::GetCMakeVersion();
this->Makefile->IssueMessage(cmake::FATAL_ERROR, e.str());
cmSystemTools::SetFatalErrorOccured();
return true;
}
// The version is not from the future, so enforce unknown arguments.
if(!this->EnforceUnknownArguments())
{
return false;
}
if (required_major < 2 || (required_major == 2 && required_minor < 4))
{
this->Makefile->IssueMessage(
cmake::AUTHOR_WARNING,
"Compatibility with CMake < 2.4 is not supported by CMake >= 3.0.");
this->Makefile->SetPolicyVersion("2.4");
}
else
{
this->Makefile->SetPolicyVersion(version_string.c_str());
}
return true;
}
//----------------------------------------------------------------------------
bool cmCMakeMinimumRequired::EnforceUnknownArguments()
{
if(!this->UnknownArguments.empty())
{
cmOStringStream e;
e << "called with unknown argument \""
<< this->UnknownArguments[0] << "\".";
this->SetError(e.str().c_str());
return false;
}
return true;
}
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