75 строки
2.5 KiB
C++
75 строки
2.5 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 "cmVariableRequiresCommand.h"
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#include "cmState.h"
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// cmLibraryCommand
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bool cmVariableRequiresCommand::InitialPass(
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std::vector<std::string> const& args, cmExecutionStatus&)
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{
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if (this->Disallowed(
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cmPolicies::CMP0035,
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"The variable_requires command should not be called; see CMP0035.")) {
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return true;
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}
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if (args.size() < 3) {
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this->SetError("called with incorrect number of arguments");
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return false;
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}
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std::string testVariable = args[0];
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if (!this->Makefile->IsOn(testVariable)) {
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return true;
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}
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std::string resultVariable = args[1];
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bool requirementsMet = true;
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std::string notSet;
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bool hasAdvanced = false;
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cmState* state = this->Makefile->GetState();
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for (unsigned int i = 2; i < args.size(); ++i) {
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if (!this->Makefile->IsOn(args[i])) {
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requirementsMet = false;
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notSet += args[i];
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notSet += "\n";
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if (state->GetCacheEntryValue(args[i]) &&
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state->GetCacheEntryPropertyAsBool(args[i], "ADVANCED")) {
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hasAdvanced = true;
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}
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}
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}
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const char* reqVar = this->Makefile->GetDefinition(resultVariable);
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// if reqVar is unset, then set it to requirementsMet
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// if reqVar is set to true, but requirementsMet is false , then
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// set reqVar to false.
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if (!reqVar || (!requirementsMet && this->Makefile->IsOn(reqVar))) {
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this->Makefile->AddDefinition(resultVariable, requirementsMet);
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}
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if (!requirementsMet) {
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std::string message = "Variable assertion failed:\n";
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message +=
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testVariable + " Requires that the following unset variables are set:\n";
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message += notSet;
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message += "\nPlease set them, or set ";
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message += testVariable + " to false, and re-configure.\n";
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if (hasAdvanced) {
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message +=
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"One or more of the required variables is advanced."
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" To set the variable, you must turn on advanced mode in cmake.";
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}
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cmSystemTools::Error(message.c_str());
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}
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return true;
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}
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