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/Options.h" 19 #include "clang/Driver/Tool.h" 20 #include "clang/Frontend/CompilerInstance.h" 21 #include "clang/Frontend/FrontendDiagnostic.h" 22 #include "llvm/Option/ArgList.h" 23 #include "llvm/Support/Host.h" 24 using namespace clang; 25 using namespace llvm::opt; 26 27 /// createInvocationFromCommandLine - Construct a compiler invocation object for 28 /// a command line argument vector. 29 /// 30 /// \return A CompilerInvocation, or 0 if none was built for the given 31 /// argument vector. 32 CompilerInvocation * 33 clang::createInvocationFromCommandLine(ArrayRef<const char *> ArgList, 34 IntrusiveRefCntPtr<DiagnosticsEngine> Diags) { 35 if (!Diags.getPtr()) { 36 // No diagnostics engine was provided, so create our own diagnostics object 37 // with the default options. 38 Diags = CompilerInstance::createDiagnostics(new DiagnosticOptions); 39 } 40 41 SmallVector<const char *, 16> Args; 42 Args.push_back("<clang>"); // FIXME: Remove dummy argument. 43 Args.insert(Args.end(), ArgList.begin(), ArgList.end()); 44 45 // FIXME: Find a cleaner way to force the driver into restricted modes. 46 Args.push_back("-fsyntax-only"); 47 48 // FIXME: We shouldn't have to pass in the path info. 49 driver::Driver TheDriver("clang", llvm::sys::getDefaultTargetTriple(), 50 "a.out", *Diags); 51 52 // Don't check that inputs exist, they may have been remapped. 53 TheDriver.setCheckInputsExist(false); 54 55 OwningPtr<driver::Compilation> C(TheDriver.BuildCompilation(Args)); 56 57 // Just print the cc1 options if -### was present. 58 if (C->getArgs().hasArg(driver::options::OPT__HASH_HASH_HASH)) { 59 C->PrintJob(llvm::errs(), C->getJobs(), "\n", true); 60 return 0; 61 } 62 63 // We expect to get back exactly one command job, if we didn't something 64 // failed. 65 const driver::JobList &Jobs = C->getJobs(); 66 if (Jobs.size() != 1 || !isa<driver::Command>(*Jobs.begin())) { 67 SmallString<256> Msg; 68 llvm::raw_svector_ostream OS(Msg); 69 C->PrintJob(OS, C->getJobs(), "; ", true); 70 Diags->Report(diag::err_fe_expected_compiler_job) << OS.str(); 71 return 0; 72 } 73 74 const driver::Command *Cmd = cast<driver::Command>(*Jobs.begin()); 75 if (StringRef(Cmd->getCreator().getName()) != "clang") { 76 Diags->Report(diag::err_fe_expected_clang_command); 77 return 0; 78 } 79 80 const ArgStringList &CCArgs = Cmd->getArguments(); 81 OwningPtr<CompilerInvocation> CI(new CompilerInvocation()); 82 if (!CompilerInvocation::CreateFromArgs(*CI, 83 const_cast<const char **>(CCArgs.data()), 84 const_cast<const char **>(CCArgs.data()) + 85 CCArgs.size(), 86 *Diags)) 87 return 0; 88 return CI.take(); 89 } 90
