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/Option.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/Tool.h"
#include "clang/Driver/ToolChain.h"
#include "clang/Driver/Types.h"

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

#include "InputInfo.h"

#include <map>

using namespace clang::driver;

Driver::Driver(const char *_Name, const char *_Dir,
               const char *_DefaultHostTriple,
               const char *_DefaultImageName,
               Diagnostic &_Diags) 
  : Opts(new OptTable()), Diags(_Diags), 
    Name(_Name), Dir(_Dir), DefaultHostTriple(_DefaultHostTriple),
    DefaultImageName(_DefaultImageName),
    Host(0),
    CCCIsCXX(false), CCCEcho(false), CCCPrintBindings(false),
    CCCNoClang(false), CCCNoClangCXX(false), CCCNoClangCPP(false),
    SuppressMissingInputWarning(false)
{
}

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

ArgList *Driver::ParseArgStrings(const char **ArgBegin, const char **ArgEnd) {
  llvm::PrettyStackTraceString CrashInfo("Command line argument parsing");
  ArgList *Args = new ArgList(ArgBegin, ArgEnd);
  
  // FIXME: Handle '@' args (or at least error on them).

  unsigned Index = 0, End = ArgEnd - ArgBegin;
  while (Index < End) {
    // gcc's handling of empty arguments doesn't make
    // sense, but this is not a common use case. :)
    //
    // We just ignore them here (note that other things may
    // still take them as arguments).
    if (Args->getArgString(Index)[0] == '\0') {
      ++Index;
      continue;
    }

    unsigned Prev = Index;
    Arg *A = getOpts().ParseOneArg(*Args, Index, End);
    if (A) {
      if (A->getOption().isUnsupported()) {
        Diag(clang::diag::err_drv_unsupported_opt) << A->getOption().getName();
        continue;
      }

      Args->append(A);
    }

    assert(Index > Prev && "Parser failed to consume argument.");
    (void) Prev;
  }

  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, CC_PRINT_OPTIONS, QA_OVERRIDE_GCC3_OPTIONS.

  // FIXME: What are we going to do with -V and -b?

  // FIXME: Handle CCC_ADD_ARGS.

  // FIXME: This stuff needs to go into the Compilation, not the
  // driver.
  bool CCCPrintOptions = false, CCCPrintActions = false;

  const char **Start = argv + 1, **End = argv + argc;
  const char *HostTriple = DefaultHostTriple.c_str();

  // Read -ccc args. 
  //
  // FIXME: We need to figure out where this behavior should
  // live. Most of it should be outside in the client; the parts that
  // aren't should have proper options, either by introducing new ones
  // or by overloading gcc ones like -V or -b.
  for (; Start != End && memcmp(*Start, "-ccc-", 5) == 0; ++Start) {
    const char *Opt = *Start + 5;
    
    if (!strcmp(Opt, "print-options")) {
      CCCPrintOptions = true;
    } else if (!strcmp(Opt, "print-phases")) {
      CCCPrintActions = true;
    } else if (!strcmp(Opt, "print-bindings")) {
      CCCPrintBindings = true;
    } else if (!strcmp(Opt, "cxx")) {
      CCCIsCXX = true;
    } else if (!strcmp(Opt, "echo")) {
      CCCEcho = true;
      
    } else if (!strcmp(Opt, "no-clang")) {
      CCCNoClang = true;
    } else if (!strcmp(Opt, "no-clang-cxx")) {
      CCCNoClangCXX = true;
    } else if (!strcmp(Opt, "no-clang-cpp")) {
      CCCNoClangCPP = true;
    } else if (!strcmp(Opt, "clang-archs")) {
      assert(Start+1 < End && "FIXME: -ccc- argument handling.");
      const char *Cur = *++Start;
    
      for (;;) {
        const char *Next = strchr(Cur, ',');

        if (Next) {
          CCCClangArchs.insert(std::string(Cur, Next));
          Cur = Next + 1;
        } else {
          CCCClangArchs.insert(std::string(Cur));
          break;
        }
      }

    }