| /* Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
| file Copyright.txt or https://cmake.org/licensing for details. */ |
| |
| #include "cmStandardLevelResolver.h" |
| |
| #include <algorithm> |
| #include <cassert> |
| #include <cstddef> |
| #include <sstream> |
| #include <stdexcept> |
| #include <unordered_map> |
| #include <utility> |
| #include <vector> |
| |
| #include <cm/iterator> |
| #include <cmext/algorithm> |
| |
| #include "cmGeneratorExpression.h" |
| #include "cmGeneratorTarget.h" |
| #include "cmGlobalGenerator.h" |
| #include "cmMakefile.h" |
| #include "cmMessageType.h" |
| #include "cmProperty.h" |
| #include "cmStringAlgorithms.h" |
| #include "cmTarget.h" |
| #include "cmake.h" |
| |
| namespace { |
| |
| #define FEATURE_STRING(F) , #F |
| const char* const C_FEATURES[] = { nullptr FOR_EACH_C_FEATURE( |
| FEATURE_STRING) }; |
| |
| const char* const CXX_FEATURES[] = { nullptr FOR_EACH_CXX_FEATURE( |
| FEATURE_STRING) }; |
| |
| const char* const CUDA_FEATURES[] = { nullptr FOR_EACH_CUDA_FEATURE( |
| FEATURE_STRING) }; |
| #undef FEATURE_STRING |
| |
| struct StandardNeeded |
| { |
| int index; |
| int value; |
| }; |
| |
| struct StanardLevelComputer |
| { |
| explicit StanardLevelComputer(std::string lang, std::vector<int> levels, |
| std::vector<std::string> levelsStr) |
| : Language(std::move(lang)) |
| , Levels(std::move(levels)) |
| , LevelsAsStrings(std::move(levelsStr)) |
| { |
| assert(levels.size() == levelsStr.size()); |
| } |
| |
| std::string GetCompileOptionDef(cmMakefile* makefile, |
| cmGeneratorTarget const* target, |
| std::string const& config) const |
| { |
| |
| const auto& stds = this->Levels; |
| const auto& stdsStrings = this->LevelsAsStrings; |
| |
| cmProp defaultStd = makefile->GetDefinition( |
| cmStrCat("CMAKE_", this->Language, "_STANDARD_DEFAULT")); |
| if (!cmNonempty(defaultStd)) { |
| // this compiler has no notion of language standard levels |
| return std::string{}; |
| } |
| |
| bool ext = true; |
| if (cmProp extPropValue = target->GetLanguageExtensions(this->Language)) { |
| if (cmIsOff(*extPropValue)) { |
| ext = false; |
| } |
| } |
| |
| cmProp standardProp = target->GetLanguageStandard(this->Language, config); |
| if (!standardProp) { |
| if (ext) { |
| // No language standard is specified and extensions are not disabled. |
| // Check if this compiler needs a flag to enable extensions. |
| return cmStrCat("CMAKE_", this->Language, "_EXTENSION_COMPILE_OPTION"); |
| } |
| return std::string{}; |
| } |
| |
| std::string const type = ext ? "EXTENSION" : "STANDARD"; |
| |
| if (target->GetLanguageStandardRequired(this->Language)) { |
| std::string option_flag = cmStrCat( |
| "CMAKE_", this->Language, *standardProp, "_", type, "_COMPILE_OPTION"); |
| |
| cmProp opt = target->Target->GetMakefile()->GetDefinition(option_flag); |
| if (!opt) { |
| std::ostringstream e; |
| e << "Target \"" << target->GetName() |
| << "\" requires the language " |
| "dialect \"" |
| << this->Language << *standardProp << "\" " |
| << (ext ? "(with compiler extensions)" : "") |
| << ", but CMake " |
| "does not know the compile flags to use to enable it."; |
| makefile->IssueMessage(MessageType::FATAL_ERROR, e.str()); |
| } |
| return option_flag; |
| } |
| |
| std::string standardStr(*standardProp); |
| if (this->Language == "CUDA" && standardStr == "98") { |
| standardStr = "03"; |
| } |
| |
| int standardValue = -1; |
| int defaultValue = -1; |
| try { |
| standardValue = std::stoi(standardStr); |
| defaultValue = std::stoi(*defaultStd); |
| } catch (std::invalid_argument&) { |
| // fall through as we want an error |
| // when we can't find the bad value in the `stds` vector |
| } |
| |
| auto stdIt = std::find(cm::cbegin(stds), cm::cend(stds), standardValue); |
| if (stdIt == cm::cend(stds)) { |
| std::string e = |
| cmStrCat(this->Language, "_STANDARD is set to invalid value '", |
| standardStr, "'"); |
| makefile->GetCMakeInstance()->IssueMessage(MessageType::FATAL_ERROR, e, |
| target->GetBacktrace()); |
| return std::string{}; |
| } |
| |
| auto defaultStdIt = |
| std::find(cm::cbegin(stds), cm::cend(stds), defaultValue); |
| if (defaultStdIt == cm::cend(stds)) { |
| std::string e = cmStrCat("CMAKE_", this->Language, |
| "_STANDARD_DEFAULT is set to invalid value '", |
| *defaultStd, "'"); |
| makefile->IssueMessage(MessageType::INTERNAL_ERROR, e); |
| return std::string{}; |
| } |
| |
| // If the standard requested is older than the compiler's default |
| // then we need to use a flag to change it. |
| if (stdIt <= defaultStdIt) { |
| auto offset = std::distance(cm::cbegin(stds), stdIt); |
| return cmStrCat("CMAKE_", this->Language, stdsStrings[offset], "_", type, |
| "_COMPILE_OPTION"); |
| } |
| |
| // The standard requested is at least as new as the compiler's default, |
| // and the standard request is not required. Decay to the newest standard |
| // for which a flag is defined. |
| for (; defaultStdIt < stdIt; --stdIt) { |
| auto offset = std::distance(cm::cbegin(stds), stdIt); |
| std::string option_flag = |
| cmStrCat("CMAKE_", this->Language, stdsStrings[offset], "_", type, |
| "_COMPILE_OPTION"); |
| if (target->Target->GetMakefile()->GetDefinition(option_flag)) { |
| return option_flag; |
| } |
| } |
| |
| return std::string{}; |
| } |
| |
| bool GetNewRequiredStandard(cmMakefile* makefile, |
| std::string const& targetName, |
| const std::string& feature, |
| cmProp currentLangStandardValue, |
| std::string& newRequiredStandard, |
| std::string* error) const |
| { |
| if (currentLangStandardValue) { |
| newRequiredStandard = *currentLangStandardValue; |
| } else { |
| newRequiredStandard.clear(); |
| } |
| |
| auto needed = this->HighestStandardNeeded(makefile, feature); |
| |
| cmProp existingStandard = currentLangStandardValue; |
| if (existingStandard == nullptr) { |
| cmProp defaultStandard = makefile->GetDefinition( |
| cmStrCat("CMAKE_", this->Language, "_STANDARD_DEFAULT")); |
| if (cmNonempty(defaultStandard)) { |
| existingStandard = defaultStandard; |
| } |
| } |
| |
| auto existingLevelIter = cm::cend(this->Levels); |
| if (existingStandard) { |
| existingLevelIter = |
| std::find(cm::cbegin(this->Levels), cm::cend(this->Levels), |
| std::stoi(*existingStandard)); |
| if (existingLevelIter == cm::cend(this->Levels)) { |
| const std::string e = |
| cmStrCat("The ", this->Language, "_STANDARD property on target \"", |
| targetName, "\" contained an invalid value: \"", |
| *existingStandard, "\"."); |
| if (error) { |
| *error = e; |
| } else { |
| makefile->IssueMessage(MessageType::FATAL_ERROR, e); |
| } |
| return false; |
| } |
| } |
| |
| if (needed.index != -1) { |
| // Ensure the C++ language level is high enough to support |
| // the needed C++ features. |
| if (existingLevelIter == cm::cend(this->Levels) || |
| existingLevelIter < this->Levels.begin() + needed.index) { |
| newRequiredStandard = this->LevelsAsStrings[needed.index]; |
| } |
| } |
| |
| return true; |
| } |
| |
| bool HaveStandardAvailable(cmMakefile* makefile, |
| cmGeneratorTarget const* target, |
| std::string const& config, |
| std::string const& feature) const |
| { |
| cmProp defaultStandard = makefile->GetDefinition( |
| cmStrCat("CMAKE_", this->Language, "_STANDARD_DEFAULT")); |
| if (!defaultStandard) { |
| makefile->IssueMessage( |
| MessageType::INTERNAL_ERROR, |
| cmStrCat("CMAKE_", this->Language, |
| "_STANDARD_DEFAULT is not set. COMPILE_FEATURES support " |
| "not fully configured for this compiler.")); |
| // Return true so the caller does not try to lookup the default standard. |
| return true; |
| } |
| // convert defaultStandard to an integer |
| if (std::find(cm::cbegin(this->Levels), cm::cend(this->Levels), |
| std::stoi(*defaultStandard)) == cm::cend(this->Levels)) { |
| const std::string e = cmStrCat("The CMAKE_", this->Language, |
| "_STANDARD_DEFAULT variable contains an " |
| "invalid value: \"", |
| *defaultStandard, "\"."); |
| makefile->IssueMessage(MessageType::INTERNAL_ERROR, e); |
| return false; |
| } |
| |
| cmProp existingStandard = |
| target->GetLanguageStandard(this->Language, config); |
| if (!existingStandard) { |
| existingStandard = defaultStandard; |
| } |
| |
| auto existingLevelIter = |
| std::find(cm::cbegin(this->Levels), cm::cend(this->Levels), |
| std::stoi(*existingStandard)); |
| if (existingLevelIter == cm::cend(this->Levels)) { |
| const std::string e = |
| cmStrCat("The ", this->Language, "_STANDARD property on target \"", |
| target->GetName(), "\" contained an invalid value: \"", |
| *existingStandard, "\"."); |
| makefile->IssueMessage(MessageType::FATAL_ERROR, e); |
| return false; |
| } |
| |
| auto needed = this->HighestStandardNeeded(makefile, feature); |
| |
| return (needed.index == -1) || |
| (this->Levels.begin() + needed.index) <= existingLevelIter; |
| } |
| |
| StandardNeeded HighestStandardNeeded(cmMakefile* makefile, |
| std::string const& feature) const |
| { |
| std::string prefix = cmStrCat("CMAKE_", this->Language); |
| StandardNeeded maxLevel = { -1, -1 }; |
| for (size_t i = 0; i < this->Levels.size(); ++i) { |
| if (cmProp prop = makefile->GetDefinition( |
| cmStrCat(prefix, this->LevelsAsStrings[i], "_COMPILE_FEATURES"))) { |
| std::vector<std::string> props = cmExpandedList(*prop); |
| if (cm::contains(props, feature)) { |
| maxLevel = { static_cast<int>(i), this->Levels[i] }; |
| } |
| } |
| } |
| return maxLevel; |
| } |
| |
| bool IsLaterStandard(int lhs, int rhs) const |
| { |
| auto rhsIt = |
| std::find(cm::cbegin(this->Levels), cm::cend(this->Levels), rhs); |
| |
| return std::find(rhsIt, cm::cend(this->Levels), lhs) != |
| cm::cend(this->Levels); |
| } |
| |
| std::string Language; |
| std::vector<int> Levels; |
| std::vector<std::string> LevelsAsStrings; |
| }; |
| |
| std::unordered_map<std::string, StanardLevelComputer> StandardComputerMapping = |
| { |
| { "C", |
| StanardLevelComputer{ "C", std::vector<int>{ 90, 99, 11 }, |
| std::vector<std::string>{ "90", "99", "11" } } }, |
| { "CXX", |
| StanardLevelComputer{ |
| "CXX", std::vector<int>{ 98, 11, 14, 17, 20 }, |
| std::vector<std::string>{ "98", "11", "14", "17", "20" } } }, |
| { "CUDA", |
| StanardLevelComputer{ |
| "CUDA", std::vector<int>{ 03, 11, 14, 17, 20 }, |
| std::vector<std::string>{ "03", "11", "14", "17", "20" } } }, |
| { "OBJC", |
| StanardLevelComputer{ "OBJC", std::vector<int>{ 90, 99, 11 }, |
| std::vector<std::string>{ "90", "99", "11" } } }, |
| { "OBJCXX", |
| StanardLevelComputer{ |
| "OBJCXX", std::vector<int>{ 98, 11, 14, 17, 20 }, |
| std::vector<std::string>{ "98", "11", "14", "17", "20" } } }, |
| }; |
| } |
| |
| std::string cmStandardLevelResolver::GetCompileOptionDef( |
| cmGeneratorTarget const* target, std::string const& lang, |
| std::string const& config) const |
| { |
| const auto& mapping = StandardComputerMapping.find(lang); |
| if (mapping == cm::cend(StandardComputerMapping)) { |
| return std::string{}; |
| } |
| |
| return mapping->second.GetCompileOptionDef(this->Makefile, target, config); |
| } |
| |
| bool cmStandardLevelResolver::AddRequiredTargetFeature( |
| cmTarget* target, const std::string& feature, std::string* error) const |
| { |
| if (cmGeneratorExpression::Find(feature) != std::string::npos) { |
| target->AppendProperty("COMPILE_FEATURES", feature); |
| return true; |
| } |
| |
| std::string lang; |
| if (!this->CheckCompileFeaturesAvailable(target->GetName(), feature, lang, |
| error)) { |
| return false; |
| } |
| |
| target->AppendProperty("COMPILE_FEATURES", feature); |
| |
| // FIXME: Add a policy to avoid updating the <LANG>_STANDARD target |
| // property due to COMPILE_FEATURES. The language standard selection |
| // should be done purely at generate time based on whatever the project |
| // code put in these properties explicitly. That is mostly true now, |
| // but for compatibility we need to continue updating the property here. |
| std::string newRequiredStandard; |
| bool newRequired = this->GetNewRequiredStandard( |
| target->GetName(), feature, |
| target->GetProperty(cmStrCat(lang, "_STANDARD")), newRequiredStandard, |
| error); |
| if (!newRequiredStandard.empty()) { |
| target->SetProperty(cmStrCat(lang, "_STANDARD"), newRequiredStandard); |
| } |
| return newRequired; |
| } |
| |
| bool cmStandardLevelResolver::CheckCompileFeaturesAvailable( |
| const std::string& targetName, const std::string& feature, std::string& lang, |
| std::string* error) const |
| { |
| if (!this->CompileFeatureKnown(targetName, feature, lang, error)) { |
| return false; |
| } |
| |
| const char* features = this->CompileFeaturesAvailable(lang, error); |
| if (!features) { |
| return false; |
| } |
| |
| std::vector<std::string> availableFeatures = cmExpandedList(features); |
| if (!cm::contains(availableFeatures, feature)) { |
| std::ostringstream e; |
| e << "The compiler feature \"" << feature << "\" is not known to " << lang |
| << " compiler\n\"" |
| << this->Makefile->GetSafeDefinition("CMAKE_" + lang + "_COMPILER_ID") |
| << "\"\nversion " |
| << this->Makefile->GetSafeDefinition("CMAKE_" + lang + |
| "_COMPILER_VERSION") |
| << "."; |
| if (error) { |
| *error = e.str(); |
| } else { |
| this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str()); |
| } |
| return false; |
| } |
| |
| return true; |
| } |
| |
| bool cmStandardLevelResolver::CompileFeatureKnown( |
| const std::string& targetName, const std::string& feature, std::string& lang, |
| std::string* error) const |
| { |
| assert(cmGeneratorExpression::Find(feature) == std::string::npos); |
| |
| bool isCFeature = |
| std::find_if(cm::cbegin(C_FEATURES) + 1, cm::cend(C_FEATURES), |
| cmStrCmp(feature)) != cm::cend(C_FEATURES); |
| if (isCFeature) { |
| lang = "C"; |
| return true; |
| } |
| bool isCxxFeature = |
| std::find_if(cm::cbegin(CXX_FEATURES) + 1, cm::cend(CXX_FEATURES), |
| cmStrCmp(feature)) != cm::cend(CXX_FEATURES); |
| if (isCxxFeature) { |
| lang = "CXX"; |
| return true; |
| } |
| bool isCudaFeature = |
| std::find_if(cm::cbegin(CUDA_FEATURES) + 1, cm::cend(CUDA_FEATURES), |
| cmStrCmp(feature)) != cm::cend(CUDA_FEATURES); |
| if (isCudaFeature) { |
| lang = "CUDA"; |
| return true; |
| } |
| std::ostringstream e; |
| if (error) { |
| e << "specified"; |
| } else { |
| e << "Specified"; |
| } |
| e << " unknown feature \"" << feature |
| << "\" for " |
| "target \"" |
| << targetName << "\"."; |
| if (error) { |
| *error = e.str(); |
| } else { |
| this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str()); |
| } |
| return false; |
| } |
| |
| const char* cmStandardLevelResolver::CompileFeaturesAvailable( |
| const std::string& lang, std::string* error) const |
| { |
| if (!this->Makefile->GetGlobalGenerator()->GetLanguageEnabled(lang)) { |
| std::ostringstream e; |
| if (error) { |
| e << "cannot"; |
| } else { |
| e << "Cannot"; |
| } |
| e << " use features from non-enabled language " << lang; |
| if (error) { |
| *error = e.str(); |
| } else { |
| this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str()); |
| } |
| return nullptr; |
| } |
| |
| cmProp featuresKnown = |
| this->Makefile->GetDefinition("CMAKE_" + lang + "_COMPILE_FEATURES"); |
| |
| if (!cmNonempty(featuresKnown)) { |
| std::ostringstream e; |
| if (error) { |
| e << "no"; |
| } else { |
| e << "No"; |
| } |
| e << " known features for " << lang << " compiler\n\"" |
| << this->Makefile->GetSafeDefinition("CMAKE_" + lang + "_COMPILER_ID") |
| << "\"\nversion " |
| << this->Makefile->GetSafeDefinition("CMAKE_" + lang + |
| "_COMPILER_VERSION") |
| << "."; |
| if (error) { |
| *error = e.str(); |
| } else { |
| this->Makefile->IssueMessage(MessageType::FATAL_ERROR, e.str()); |
| } |
| return nullptr; |
| } |
| return cmToCStr(featuresKnown); |
| } |
| |
| bool cmStandardLevelResolver::GetNewRequiredStandard( |
| const std::string& targetName, const std::string& feature, |
| cmProp currentLangStandardValue, std::string& newRequiredStandard, |
| std::string* error) const |
| { |
| std::string lang; |
| if (!this->CheckCompileFeaturesAvailable(targetName, feature, lang, error)) { |
| return false; |
| } |
| |
| auto mapping = StandardComputerMapping.find(lang); |
| if (mapping != cm::cend(StandardComputerMapping)) { |
| return mapping->second.GetNewRequiredStandard( |
| this->Makefile, targetName, feature, currentLangStandardValue, |
| newRequiredStandard, error); |
| } |
| return false; |
| } |
| |
| bool cmStandardLevelResolver::HaveStandardAvailable( |
| cmGeneratorTarget const* target, std::string const& lang, |
| std::string const& config, const std::string& feature) const |
| { |
| auto mapping = StandardComputerMapping.find(lang); |
| if (mapping != cm::cend(StandardComputerMapping)) { |
| return mapping->second.HaveStandardAvailable(this->Makefile, target, |
| config, feature); |
| } |
| return false; |
| } |
| |
| bool cmStandardLevelResolver::IsLaterStandard(std::string const& lang, |
| std::string const& lhs, |
| std::string const& rhs) const |
| { |
| auto mapping = StandardComputerMapping.find(lang); |
| if (mapping != cm::cend(StandardComputerMapping)) { |
| return mapping->second.IsLaterStandard(std::stoi(lhs), std::stoi(rhs)); |
| } |
| return false; |
| } |
