1 //===--- CreateInvocationFromCommandLine.cpp - CompilerInvocation from Args ==// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // Construct a compiler invocation object for command line driver arguments 11 // 12 //===----------------------------------------------------------------------===// 13 14 #include "clang/Frontend/Utils.h" 15 #include "clang/Basic/DiagnosticOptions.h" 16 #include "clang/Driver/Compilation.h" 17 #include "clang/Driver/Driver.h" 18 #include "clang/Driver/Action.h" 19 #include "clang/Driver/Options.h" 20 #include "clang/Driver/Tool.h" 21 #include "clang/Frontend/CompilerInstance.h" 22 #include "clang/Frontend/FrontendDiagnostic.h" 23 #include "llvm/Option/ArgList.h" 24 #include "llvm/Support/Host.h" 25 using namespace clang; 26 using namespace llvm::opt; 27 28 /// createInvocationFromCommandLine - Construct a compiler invocation object for 29 /// a command line argument vector. 30 /// 31 /// \return A CompilerInvocation, or 0 if none was built for the given 32 /// argument vector. 33 CompilerInvocation * 34 clang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList, 35 IntrusiveRefCntPtr<DiagnosticsEngine> Diags) { 36 if (!Diags.get()) { 37 // No diagnostics engine was provided, so create our own diagnostics object 38 // with the default options. 39 Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions); 40 } 41 42 SmallVector<const char *, 16> Args; 43 Args.push_back("<clang>"); // FIXME: Remove dummy argument. 44 Args.insert(Args.end(), ArgList.begin(), ArgList.end()); 45 46 // FIXME: Find a cleaner way to force the driver into restricted modes. 47 Args.push_back("-fsyntax-only"); 48 49 // FIXME: We shouldn't have to pass in the path info. 50 driver::Driver TheDriver("clang", llvm::sys::getDefaultTargetTriple(), 51 *Diags); 52 53 // Don't check that inputs exist, they may have been remapped. 54 TheDriver.setCheckInputsExist(false); 55 56 std::unique_ptr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 57 58 // Just print the cc1 options if -### was present. 59 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 60 C->getJobs().Print(llvm::errs(), "\n", true); 61 return nullptr; 62 } 63 64 // We expect to get back exactly one command job, if we didn't something 65 // failed. CUDA compilation is an exception as it creates multiple jobs. If 66 // that's the case, we proceed with the first job. If caller needs particular 67 // CUDA job, it should be controlled via --cuda-{host|device}-only option 68 // passed to the driver. 69 const driver::JobList &Jobs = C->getJobs(); 70 bool CudaCompilation = false; 71 if (Jobs.size() > 1) { 72 for (auto &A : C->getActions()){ 73 // On MacOSX real actions may end up being wrapped in BindArchAction 74 if (isa<driver::BindArchAction>(A)) 75 A = *A->begin(); 76 if (isa<driver::CudaDeviceAction>(A)) { 77 CudaCompilation = true; 78 break; 79 } 80 } 81 } 82 if (Jobs.size() == 0 || !isa<driver::Command>(*Jobs.begin()) || 83 (Jobs.size() > 1 && !CudaCompilation)) { 84 SmallString<256> Msg; 85 llvm::raw_svector_ostream OS(Msg); 86 Jobs.Print(OS, "; ", true); 87 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 88 return nullptr; 89 } 90 91 const driver::Command &Cmd = cast<driver::Command>(*Jobs.begin()); 92 if (StringRef(Cmd.getCreator().getName()) != "clang") { 93 Diags->Report(diag::err_fe_expected_clang_command); 94 return nullptr; 95 } 96 97 const ArgStringList &CCArgs = Cmd.getArguments(); 98 std::unique_ptr<CompilerInvocation> CI(new CompilerInvocation()); 99 if (!CompilerInvocation::CreateFromArgs(*CI, 100 const_cast<const char **>(CCArgs.data()), 101 const_cast<const char **>(CCArgs.data()) + 102 CCArgs.size(), 103 *Diags)) 104 return nullptr; 105 return CI.release(); 106 } 107