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109 lines
3.6 KiB
109 lines
3.6 KiB
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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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::InitialPass(std::vector<std::string> const& args,
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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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if (args[i] == "VERSION") {
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doing_version = true;
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} else if (args[i] == "FATAL_ERROR") {
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if (doing_version) {
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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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} else if (doing_version) {
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doing_version = false;
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version_string = args[i];
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} else {
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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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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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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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unsigned int current_major = cmVersion::GetMajorVersion();
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unsigned int current_minor = cmVersion::GetMinorVersion();
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unsigned int current_patch = cmVersion::GetPatchVersion();
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unsigned 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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unsigned int required_major = 0;
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unsigned int required_minor = 0;
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unsigned int required_patch = 0;
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unsigned int required_tweak = 0;
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if (sscanf(version_string.c_str(), "%u.%u.%u.%u", &required_major,
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&required_minor, &required_patch, &required_tweak) < 2) {
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std::ostringstream e;
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e << "could not parse VERSION \"" << version_string << "\".";
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this->SetError(e.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 && current_minor < required_minor) ||
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(current_major == required_major && current_minor == required_minor &&
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current_patch < required_patch) ||
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(current_major == required_major && current_minor == required_minor &&
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current_patch == required_patch && current_tweak < required_tweak)) {
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// The current version is too low.
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std::ostringstream e;
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e << "CMake " << version_string
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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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return false;
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}
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if (required_major < 2 || (required_major == 2 && required_minor < 4)) {
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this->Makefile->IssueMessage(
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cmake::AUTHOR_WARNING,
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"Compatibility with CMake < 2.4 is not supported by CMake >= 3.0.");
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this->Makefile->SetPolicyVersion("2.4");
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} else {
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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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bool cmCMakeMinimumRequired::EnforceUnknownArguments()
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{
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if (!this->UnknownArguments.empty()) {
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std::ostringstream e;
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e << "called with unknown argument \"" << this->UnknownArguments[0]
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<< "\".";
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this->SetError(e.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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