path: root/lib/Driver/Driver.cpp

//===--- Driver.cpp - Clang GCC Compatible Driver -----------------------*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "clang/Driver/Driver.h"

#include "clang/Driver/Action.h"
#include "clang/Driver/Arg.h"
#include "clang/Driver/ArgList.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/HostInfo.h"
#include "clang/Driver/Job.h"
#include "clang/Driver/OptTable.h"
#include "clang/Driver/Option.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "clang/Driver/Types.h"

#include "clang/Basic/Version.h"

#include "llvm/ADT/StringSet.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/System/Path.h"
#include "llvm/System/Program.h"

#include "InputInfo.h"

#include <map>

using namespace clang::driver;
using namespace clang;

// Used to set values for "production" clang, for releases.
// #define USE_PRODUCTION_CLANG

Driver::Driver(llvm::StringRef _Name, llvm::StringRef _Dir,
               llvm::StringRef _DefaultHostTriple,
               llvm::StringRef _DefaultImageName,
               bool IsProduction, Diagnostic &_Diags)
  : Opts(createDriverOptTable()), Diags(_Diags),
    Name(_Name), Dir(_Dir), DefaultHostTriple(_DefaultHostTriple),
    DefaultImageName(_DefaultImageName),
    Host(0),
    CCCIsCXX(false), CCCEcho(false), CCCPrintBindings(false),
    CCCGenericGCCName("gcc"), CCCUseClang(true),
    CCCUseClangCXX(true), CCCUseClangCPP(true), CCCUsePCH(true),
    SuppressMissingInputWarning(false) {
  if (IsProduction) {
    // In a "production" build, only use clang on architectures we expect to
    // work, and don't use clang C++.
    //
    // During development its more convenient to always have the driver use
    // clang, but we don't want users to be confused when things don't work, or
    // to file bugs for things we don't support.
    CCCClangArchs.insert(llvm::Triple::x86);
    CCCClangArchs.insert(llvm::Triple::x86_64);
    CCCClangArchs.insert(llvm::Triple::arm);

    CCCUseClangCXX = false;
  }
}

Driver::~Driver() {
  delete Opts;
  delete Host;
}

InputArgList *Driver::ParseArgStrings(const char **ArgBegin,
                                      const char **ArgEnd) {
  llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
  unsigned MissingArgIndex, MissingArgCount;
  InputArgList *Args = getOpts().ParseArgs(ArgBegin, ArgEnd,
                                           MissingArgIndex, MissingArgCount);

  // Check for missing argument error.
  if (MissingArgCount)
    Diag(clang::diag::err_drv_missing_argument)
      << Args->getArgString(MissingArgIndex) << MissingArgCount;

  // Check for unsupported options.
  for (ArgList::const_iterator it = Args->begin(), ie = Args->end();
       it != ie; ++it) {
    Arg *A = *it;
    if (A->getOption().isUnsupported()) {
      Diag(clang::diag::err_drv_unsupported_opt) << A->getAsString(*Args);
      continue;
    }
  }

  return Args;
}

Compilation *Driver::BuildCompilation(int argc, const char **argv) {
  llvm::PrettyStackTraceString CrashInfo("Compilation construction");

  // FIXME: Handle environment options which effect driver behavior, somewhere
  // (client?). GCC_EXEC_PREFIX, COMPILER_PATH, LIBRARY_PATH, LPATH,