From bf7fc9c542f2d7b47aaa5a387bbac5a25005c00e Mon Sep 17 00:00:00 2001 From: Douglas Gregor Date: Wed, 27 Mar 2013 16:47:18 +0000 Subject: [PATCH] Introduce -module-file-info option that provides information about a particular module file. This option can be useful for end users who want to know why they ended up with a ton of different variants of the "std" module in their module cache. This problem should go away over time, as we reduce the need for module variants, but it will never go away entirely. llvm-svn: 178148 --- clang/docs/Modules.rst | 3 + clang/include/clang/Basic/DiagnosticDriverKinds.td | 2 + clang/include/clang/Driver/Options.td | 1 + clang/include/clang/Driver/Types.def | 1 + clang/include/clang/Frontend/FrontendActions.h | 17 ++- clang/include/clang/Frontend/FrontendOptions.h | 1 + clang/include/clang/Serialization/ASTReader.h | 9 ++ clang/include/clang/Serialization/ModuleManager.h | 5 +- clang/lib/Driver/Driver.cpp | 6 +- clang/lib/Driver/Tools.cpp | 8 ++ clang/lib/Driver/Types.cpp | 3 +- clang/lib/Frontend/CompilerInvocation.cpp | 7 +- clang/lib/Frontend/FrontendActions.cpp | 125 +++++++++++++++++++++ clang/lib/Frontend/FrontendOptions.cpp | 2 +- .../lib/FrontendTool/ExecuteCompilerInvocation.cpp | 1 + clang/lib/Serialization/ASTReader.cpp | 5 +- clang/lib/Serialization/ModuleManager.cpp | 14 ++- clang/test/Modules/module_file_info.m | 34 ++++++ 18 files changed, 234 insertions(+), 10 deletions(-) create mode 100644 clang/test/Modules/module_file_info.m diff --git a/clang/docs/Modules.rst b/clang/docs/Modules.rst index b892e38..8a6b8b6 100644 --- a/clang/docs/Modules.rst +++ b/clang/docs/Modules.rst @@ -180,6 +180,9 @@ Command-line parameters ``-fmodules-prune-after=seconds`` Specify the minimum time (in seconds) for which a file in the module cache must be unused (according to access time) before module pruning will remove it. The default delay is large (2,678,400 seconds, or 31 days) to avoid excessive module rebuilding. +``-module-file-info `` + Debugging aid that prints information about a given module file (with a ``.pcm`` extension), including the language and preprocessor options that particular module variant was built with. + Module Map Language =================== diff --git a/clang/include/clang/Basic/DiagnosticDriverKinds.td b/clang/include/clang/Basic/DiagnosticDriverKinds.td index d14fe94..15b8948 100644 --- a/clang/include/clang/Basic/DiagnosticDriverKinds.td +++ b/clang/include/clang/Basic/DiagnosticDriverKinds.td @@ -59,6 +59,8 @@ def err_drv_no_linker_llvm_support : Error< "'%0': unable to pass LLVM bit-code files to linker">; def err_drv_no_ast_support : Error< "'%0': unable to use AST files with this tool">; +def err_drv_no_module_support : Error< + "'%0': unable to use module files with this tool">; def err_drv_clang_unsupported : Error< "the clang compiler does not support '%0'">; def err_drv_clang_unsupported_per_platform : Error< diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td index c9575c3..9de13fb 100644 --- a/clang/include/clang/Driver/Options.td +++ b/clang/include/clang/Driver/Options.td @@ -956,6 +956,7 @@ def mips64 : Flag<["-"], "mips64">, Group, HelpText<"Equivalent to -march=mips64">, Flags<[HelpHidden]>; def mips64r2 : Flag<["-"], "mips64r2">, Group, HelpText<"Equivalent to -march=mips64r2">, Flags<[HelpHidden]>; +def module_file_info : Flag<["-"], "module-file-info">, Flags<[DriverOption,CC1Option]>, Group; def mthumb : Flag<["-"], "mthumb">, Group; def mtune_EQ : Joined<["-"], "mtune=">, Group; def multi__module : Flag<["-"], "multi_module">; diff --git a/clang/include/clang/Driver/Types.def b/clang/include/clang/Driver/Types.def index 4bff1f1..42f0709 100644 --- a/clang/include/clang/Driver/Types.def +++ b/clang/include/clang/Driver/Types.def @@ -80,6 +80,7 @@ TYPE("lto-bc", LTO_BC, INVALID, "o", "") // Misc. TYPE("ast", AST, INVALID, "ast", "u") +TYPE("pcm", ModuleFile, INVALID, "pcm", "u") TYPE("plist", Plist, INVALID, "plist", "") TYPE("rewritten-objc", RewrittenObjC,INVALID, "cpp", "") TYPE("rewritten-legacy-objc", RewrittenLegacyObjC,INVALID, "cpp", "") diff --git a/clang/include/clang/Frontend/FrontendActions.h b/clang/include/clang/Frontend/FrontendActions.h index 477ac45..1786190 100644 --- a/clang/include/clang/Frontend/FrontendActions.h +++ b/clang/include/clang/Frontend/FrontendActions.h @@ -123,7 +123,7 @@ public: std::string &OutputFile, raw_ostream *&OS); }; - + class SyntaxOnlyAction : public ASTFrontendAction { protected: virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI, @@ -133,6 +133,21 @@ public: virtual bool hasCodeCompletionSupport() const { return true; } }; +/// \brief Dump information about the given module file, to be used for +/// basic debugging and discovery. +class DumpModuleInfoAction : public ASTFrontendAction { +protected: + virtual ASTConsumer *CreateASTConsumer(CompilerInstance &CI, + StringRef InFile); + virtual void ExecuteAction(); + +public: + virtual bool hasPCHSupport() const { return false; } + virtual bool hasASTFileSupport() const { return true; } + virtual bool hasIRSupport() const { return false; } + virtual bool hasCodeCompletionSupport() const { return false; } +}; + /** * \brief Frontend action adaptor that merges ASTs together. * diff --git a/clang/include/clang/Frontend/FrontendOptions.h b/clang/include/clang/Frontend/FrontendOptions.h index c39c190..234e344 100644 --- a/clang/include/clang/Frontend/FrontendOptions.h +++ b/clang/include/clang/Frontend/FrontendOptions.h @@ -43,6 +43,7 @@ namespace frontend { GeneratePCH, ///< Generate pre-compiled header. GeneratePTH, ///< Generate pre-tokenized header. InitOnly, ///< Only execute frontend initialization. + ModuleFileInfo, ///< Dump information about a module file. ParseSyntaxOnly, ///< Parse and perform semantic analysis. PluginAction, ///< Run a plugin action, \see ActionName. PrintDeclContext, ///< Print DeclContext and their Decls. diff --git a/clang/include/clang/Serialization/ASTReader.h b/clang/include/clang/Serialization/ASTReader.h index 19d4918..9255336 100644 --- a/clang/include/clang/Serialization/ASTReader.h +++ b/clang/include/clang/Serialization/ASTReader.h @@ -22,6 +22,7 @@ #include "clang/Basic/FileSystemOptions.h" #include "clang/Basic/IdentifierTable.h" #include "clang/Basic/SourceManager.h" +#include "clang/Basic/Version.h" #include "clang/Lex/ExternalPreprocessorSource.h" #include "clang/Lex/HeaderSearch.h" #include "clang/Lex/PreprocessingRecord.h" @@ -99,6 +100,14 @@ class ASTReaderListener { public: virtual ~ASTReaderListener(); + /// \brief Receives the full Clang version information. + /// + /// \returns true to indicate that the version is invalid. Subclasses should + /// generally defer to this implementation. + virtual bool ReadFullVersionInformation(StringRef FullVersion) { + return FullVersion != getClangFullRepositoryVersion(); + } + /// \brief Receives the language options. /// /// \returns true to indicate the options are invalid or false otherwise. diff --git a/clang/include/clang/Serialization/ModuleManager.h b/clang/include/clang/Serialization/ModuleManager.h index c6e3265..b2c4063 100644 --- a/clang/include/clang/Serialization/ModuleManager.h +++ b/clang/include/clang/Serialization/ModuleManager.h @@ -135,7 +135,10 @@ public: /// \brief Returns the module associated with the given name ModuleFile *lookup(StringRef Name); - + + /// \brief Returns the module associated with the given module file. + ModuleFile *lookup(const FileEntry *File); + /// \brief Returns the in-memory (virtual file) buffer with the given name llvm::MemoryBuffer *lookupBuffer(StringRef Name); diff --git a/clang/lib/Driver/Driver.cpp b/clang/lib/Driver/Driver.cpp index 706409d..29ed5cf 100644 --- a/clang/lib/Driver/Driver.cpp +++ b/clang/lib/Driver/Driver.cpp @@ -126,6 +126,7 @@ const { // -{fsyntax-only,-analyze,emit-ast,S} only run up to the compiler. } else if ((PhaseArg = DAL.getLastArg(options::OPT_fsyntax_only)) || + (PhaseArg = DAL.getLastArg(options::OPT_module_file_info)) || (PhaseArg = DAL.getLastArg(options::OPT_rewrite_objc)) || (PhaseArg = DAL.getLastArg(options::OPT_rewrite_legacy_objc)) || (PhaseArg = DAL.getLastArg(options::OPT__migrate)) || @@ -1170,6 +1171,8 @@ Action *Driver::ConstructPhaseAction(const ArgList &Args, phases::ID Phase, return new MigrateJobAction(Input, types::TY_Remap); } else if (Args.hasArg(options::OPT_emit_ast)) { return new CompileJobAction(Input, types::TY_AST); + } else if (Args.hasArg(options::OPT_module_file_info)) { + return new CompileJobAction(Input, types::TY_ModuleFile); } else if (IsUsingLTO(Args)) { types::ID Output = Args.hasArg(options::OPT_S) ? types::TY_LTO_IR : types::TY_LTO_BC; @@ -1432,7 +1435,8 @@ const char *Driver::GetNamedOutputPath(Compilation &C, } // Default to writing to stdout? - if (AtTopLevel && isa(JA) && !CCGenDiagnostics) + if (AtTopLevel && !CCGenDiagnostics && + (isa(JA) || JA.getType() == types::TY_ModuleFile)) return "-"; // Output to a temporary file? diff --git a/clang/lib/Driver/Tools.cpp b/clang/lib/Driver/Tools.cpp index c7e47ad..fa3128bb 100644 --- a/clang/lib/Driver/Tools.cpp +++ b/clang/lib/Driver/Tools.cpp @@ -1860,6 +1860,8 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA, CmdArgs.push_back("-S"); } else if (JA.getType() == types::TY_AST) { CmdArgs.push_back("-emit-pch"); + } else if (JA.getType() == types::TY_ModuleFile) { + CmdArgs.push_back("-module-file-info"); } else if (JA.getType() == types::TY_RewrittenObjC) { CmdArgs.push_back("-rewrite-objc"); rewriteKind = RK_NonFragile; @@ -3696,6 +3698,9 @@ void gcc::Common::ConstructJob(Compilation &C, const JobAction &JA, else if (II.getType() == types::TY_AST) D.Diag(diag::err_drv_no_ast_support) << getToolChain().getTripleString(); + else if (II.getType() == types::TY_ModuleFile) + D.Diag(diag::err_drv_no_module_support) + << getToolChain().getTripleString(); if (types::canTypeBeUserSpecified(II.getType())) { CmdArgs.push_back("-x"); @@ -3826,6 +3831,9 @@ void hexagon::Assemble::ConstructJob(Compilation &C, const JobAction &JA, else if (II.getType() == types::TY_AST) D.Diag(clang::diag::err_drv_no_ast_support) << getToolChain().getTripleString(); + else if (II.getType() == types::TY_ModuleFile) + D.Diag(diag::err_drv_no_module_support) + << getToolChain().getTripleString(); if (II.isFilename()) CmdArgs.push_back(II.getFilename()); diff --git a/clang/lib/Driver/Types.cpp b/clang/lib/Driver/Types.cpp index 9665095..7d22596 100644 --- a/clang/lib/Driver/Types.cpp +++ b/clang/lib/Driver/Types.cpp @@ -87,7 +87,7 @@ bool types::isAcceptedByClang(ID Id) { case TY_ObjCHeader: case TY_PP_ObjCHeader: case TY_CXXHeader: case TY_PP_CXXHeader: case TY_ObjCXXHeader: case TY_PP_ObjCXXHeader: - case TY_AST: + case TY_AST: case TY_ModuleFile: case TY_LLVM_IR: case TY_LLVM_BC: return true; } @@ -164,6 +164,7 @@ types::ID types::lookupTypeForExtension(const char *Ext) { .Case("F90", TY_Fortran) .Case("F95", TY_Fortran) .Case("mii", TY_PP_ObjCXX) + .Case("pcm", TY_ModuleFile) .Default(TY_INVALID); } diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp index 2d945b5..0fb8e58 100644 --- a/clang/lib/Frontend/CompilerInvocation.cpp +++ b/clang/lib/Frontend/CompilerInvocation.cpp @@ -644,6 +644,8 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, Opts.ProgramAction = frontend::InitOnly; break; case OPT_fsyntax_only: Opts.ProgramAction = frontend::ParseSyntaxOnly; break; + case OPT_module_file_info: + Opts.ProgramAction = frontend::ModuleFileInfo; break; case OPT_print_decl_contexts: Opts.ProgramAction = frontend::PrintDeclContext; break; case OPT_print_preamble: @@ -779,7 +781,7 @@ static InputKind ParseFrontendArgs(FrontendOptions &Opts, ArgList &Args, .Case("objective-c-header", IK_ObjC) .Case("c++-header", IK_CXX) .Case("objective-c++-header", IK_ObjCXX) - .Case("ast", IK_AST) + .Cases("ast", "pcm", IK_AST) .Case("ir", IK_LLVM_IR) .Default(IK_None); if (DashX == IK_None) @@ -1465,6 +1467,7 @@ static void ParsePreprocessorOutputArgs(PreprocessorOutputOptions &Opts, case frontend::GeneratePCH: case frontend::GeneratePTH: case frontend::ParseSyntaxOnly: + case frontend::ModuleFileInfo: case frontend::PluginAction: case frontend::PrintDeclContext: case frontend::RewriteObjC: @@ -1627,6 +1630,8 @@ llvm::APInt ModuleSignature::getAsInteger() const { } std::string CompilerInvocation::getModuleHash() const { + // Note: For QoI reasons, the things we use as a hash here should all be + // dumped via the -module-info flag. using llvm::hash_code; using llvm::hash_value; using llvm::hash_combine; diff --git a/clang/lib/Frontend/FrontendActions.cpp b/clang/lib/Frontend/FrontendActions.cpp index f3466f0..5c7567f 100644 --- a/clang/lib/Frontend/FrontendActions.cpp +++ b/clang/lib/Frontend/FrontendActions.cpp @@ -19,6 +19,7 @@ #include "clang/Lex/Pragma.h" #include "clang/Lex/Preprocessor.h" #include "clang/Parse/Parser.h" +#include "clang/Serialization/ASTReader.h" #include "clang/Serialization/ASTWriter.h" #include "llvm/ADT/OwningPtr.h" #include "llvm/Support/FileSystem.h" @@ -316,6 +317,130 @@ ASTConsumer *SyntaxOnlyAction::CreateASTConsumer(CompilerInstance &CI, return new ASTConsumer(); } +ASTConsumer *DumpModuleInfoAction::CreateASTConsumer(CompilerInstance &CI, + StringRef InFile) { + return new ASTConsumer(); +} + +namespace { + /// \brief AST reader listener that dumps module information for a module + /// file. + class DumpModuleInfoListener : public ASTReaderListener { + llvm::raw_ostream &Out; + + public: + DumpModuleInfoListener(llvm::raw_ostream &Out) : Out(Out) { } + +#define DUMP_BOOLEAN(Value, Text) \ + Out.indent(4) << Text << ": " << (Value? "Yes" : "No") << "\n" + + virtual bool ReadFullVersionInformation(StringRef FullVersion) { + Out.indent(2) + << "Generated by " + << (FullVersion == getClangFullRepositoryVersion()? "this" + : "a different") + << " Clang: " << FullVersion << "\n"; + return ASTReaderListener::ReadFullVersionInformation(FullVersion); + } + + virtual bool ReadLanguageOptions(const LangOptions &LangOpts, + bool Complain) { + Out.indent(2) << "Language options:\n"; +#define LANGOPT(Name, Bits, Default, Description) \ + DUMP_BOOLEAN(LangOpts.Name, Description); +#define ENUM_LANGOPT(Name, Type, Bits, Default, Description) \ + Out.indent(4) << Description << ": " \ + << static_cast(LangOpts.get##Name()) << "\n"; +#define VALUE_LANGOPT(Name, Bits, Default, Description) \ + Out.indent(4) << Description << ": " << LangOpts.Name << "\n"; +#define BENIGN_LANGOPT(Name, Bits, Default, Description) +#define BENIGN_ENUM_LANGOPT(Name, Type, Bits, Default, Description) +#include "clang/Basic/LangOptions.def" + return false; + } + + virtual bool ReadTargetOptions(const TargetOptions &TargetOpts, + bool Complain) { + Out.indent(2) << "Target options:\n"; + Out.indent(4) << " Triple: " << TargetOpts.Triple << "\n"; + Out.indent(4) << " CPU: " << TargetOpts.CPU << "\n"; + Out.indent(4) << " ABI: " << TargetOpts.ABI << "\n"; + Out.indent(4) << " C++ ABI: " << TargetOpts.CXXABI << "\n"; + Out.indent(4) << " Linker version: " << TargetOpts.LinkerVersion << "\n"; + + if (!TargetOpts.FeaturesAsWritten.empty()) { + Out.indent(4) << "Target features:\n"; + for (unsigned I = 0, N = TargetOpts.FeaturesAsWritten.size(); + I != N; ++I) { + Out.indent(6) << TargetOpts.FeaturesAsWritten[I] << "\n"; + } + } + + return false; + } + + virtual bool ReadHeaderSearchOptions(const HeaderSearchOptions &HSOpts, + bool Complain) { + Out.indent(2) << "Header search options:\n"; + Out.indent(4) << "System root [-isysroot=]: '" << HSOpts.Sysroot << "'\n"; + DUMP_BOOLEAN(HSOpts.UseBuiltinIncludes, + "Use builtin include directories [-nobuiltininc]"); + DUMP_BOOLEAN(HSOpts.UseStandardSystemIncludes, + "Use standard system include directories [-nostdinc]"); + DUMP_BOOLEAN(HSOpts.UseStandardCXXIncludes, + "Use standard C++ include directories [-nostdinc++]"); + DUMP_BOOLEAN(HSOpts.UseLibcxx, + "Use libc++ (rather than libstdc++) [-stdlib=]"); + return false; + } + + virtual bool ReadPreprocessorOptions(const PreprocessorOptions &PPOpts, + bool Complain, + std::string &SuggestedPredefines) { + Out.indent(2) << "Preprocessor options:\n"; + DUMP_BOOLEAN(PPOpts.UsePredefines, + "Uses compiler/target-specific predefines [-undef]"); + DUMP_BOOLEAN(PPOpts.DetailedRecord, + "Uses detailed preprocessing record (for indexing)"); + + if (!PPOpts.Macros.empty()) { + Out.indent(4) << "Predefined macros:\n"; + } + + for (std::vector >::const_iterator + I = PPOpts.Macros.begin(), IEnd = PPOpts.Macros.end(); + I != IEnd; ++I) { + Out.indent(6); + if (I->second) + Out << "-U"; + else + Out << "-D"; + Out << I->first << "\n"; + } + return false; + } +#undef DUMP_BOOLEAN + }; +} + +void DumpModuleInfoAction::ExecuteAction() { + // Set up the output file. + llvm::OwningPtr OutFile; + StringRef OutputFileName = getCompilerInstance().getFrontendOpts().OutputFile; + if (!OutputFileName.empty() && OutputFileName != "-") { + std::string ErrorInfo; + OutFile.reset(new llvm::raw_fd_ostream(OutputFileName.str().c_str(), + ErrorInfo)); + } + llvm::raw_ostream &Out = OutFile.get()? *OutFile.get() : llvm::outs(); + + Out << "Information for module file '" << getCurrentFile() << "':\n"; + DumpModuleInfoListener Listener(Out); + ASTReader::readASTFileControlBlock(getCurrentFile(), + getCompilerInstance().getFileManager(), + Listener); +} + //===----------------------------------------------------------------------===// // Preprocessor Actions //===----------------------------------------------------------------------===// diff --git a/clang/lib/Frontend/FrontendOptions.cpp b/clang/lib/Frontend/FrontendOptions.cpp index ea4005f..f1823c6 100644 --- a/clang/lib/Frontend/FrontendOptions.cpp +++ b/clang/lib/Frontend/FrontendOptions.cpp @@ -13,7 +13,7 @@ using namespace clang; InputKind FrontendOptions::getInputKindForExtension(StringRef Extension) { return llvm::StringSwitch(Extension) - .Case("ast", IK_AST) + .Cases("ast", "pcm", IK_AST) .Case("c", IK_C) .Cases("S", "s", IK_Asm) .Case("i", IK_PreprocessedC) diff --git a/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp b/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp index ad8eb04..b0d76da 100644 --- a/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp +++ b/clang/lib/FrontendTool/ExecuteCompilerInvocation.cpp @@ -62,6 +62,7 @@ static FrontendAction *CreateFrontendBaseAction(CompilerInstance &CI) { case GeneratePTH: return new GeneratePTHAction(); case InitOnly: return new InitOnlyAction(); case ParseSyntaxOnly: return new SyntaxOnlyAction(); + case ModuleFileInfo: return new DumpModuleInfoAction(); case PluginAction: { for (FrontendPluginRegistry::iterator it = diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp index 55e333a..4c2d219 100644 --- a/clang/lib/Serialization/ASTReader.cpp +++ b/clang/lib/Serialization/ASTReader.cpp @@ -3487,10 +3487,9 @@ bool ASTReader::readASTFileControlBlock(StringRef Filename, if (Record[0] != VERSION_MAJOR) return true; - const std::string &CurBranch = getClangFullRepositoryVersion(); - if (StringRef(CurBranch) != Blob) + if (Listener.ReadFullVersionInformation(Blob)) return true; - + break; } case LANGUAGE_OPTIONS: diff --git a/clang/lib/Serialization/ModuleManager.cpp b/clang/lib/Serialization/ModuleManager.cpp index 193a38b..f3d53ad 100644 --- a/clang/lib/Serialization/ModuleManager.cpp +++ b/clang/lib/Serialization/ModuleManager.cpp @@ -29,7 +29,19 @@ using namespace serialization; ModuleFile *ModuleManager::lookup(StringRef Name) { const FileEntry *Entry = FileMgr.getFile(Name, /*openFile=*/false, /*cacheFailure=*/false); - return Modules[Entry]; + if (Entry) + return lookup(Entry); + + return 0; +} + +ModuleFile *ModuleManager::lookup(const FileEntry *File) { + llvm::DenseMap::iterator Known + = Modules.find(File); + if (Known == Modules.end()) + return 0; + + return Known->second; } llvm::MemoryBuffer *ModuleManager::lookupBuffer(StringRef Name) { diff --git a/clang/test/Modules/module_file_info.m b/clang/test/Modules/module_file_info.m new file mode 100644 index 0000000..09319d6 --- /dev/null +++ b/clang/test/Modules/module_file_info.m @@ -0,0 +1,34 @@ + +@import DependsOnModule; + +// RUN: rm -rf %t +// RUN: %clang_cc1 -w -fmodules -fdisable-module-hash -fmodules-cache-path=%t -F %S/Inputs -DBLARG -DWIBBLE=WOBBLE %s +// RUN: %clang_cc1 -module-file-info %t/DependsOnModule.pcm | FileCheck %s + +// CHECK: Generated by this Clang: + +// CHECK: Language options: +// CHECK: C99: Yes +// CHECK: Objective-C 1: Yes +// CHECK: modules extension to C: Yes + +// CHECK: Target options: +// CHECK: Triple: +// CHECK: CPU: +// CHECK: ABI: +// CHECK: C++ ABI: +// CHECK: Linker version: + +// CHECK: Header search options: +// CHECK: System root [-isysroot=]: '/' +// CHECK: Use builtin include directories [-nobuiltininc]: Yes +// CHECK: Use standard system include directories [-nostdinc]: Yes +// CHECK: Use standard C++ include directories [-nostdinc++]: Yes +// CHECK: Use libc++ (rather than libstdc++) [-stdlib=]: + +// CHECK: Preprocessor options: +// CHECK: Uses compiler/target-specific predefines [-undef]: Yes +// CHECK: Uses detailed preprocessing record (for indexing): No +// CHECK: Predefined macros: +// CHECK: -DBLARG +// CHECK: -DWIBBLE=WOBBLE -- 2.7.4