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-rw-r--r--Source/cmCMakeMinimumRequired.cxx139
1 files changed, 139 insertions, 0 deletions
diff --git a/Source/cmCMakeMinimumRequired.cxx b/Source/cmCMakeMinimumRequired.cxx
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+++ b/Source/cmCMakeMinimumRequired.cxx
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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->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;
+}