path: root/lib/Basic/Targets.cpp

//===--- Targets.cpp - Implement -arch option and targets -----------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file implements construction of a TargetInfo object from a
// target triple.
//
//===----------------------------------------------------------------------===//

#include "clang/Basic/Builtins.h"
#include "clang/Basic/TargetBuiltins.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/LangOptions.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/SmallString.h"
using namespace clang;

//===----------------------------------------------------------------------===//
//  Common code shared among targets.
//===----------------------------------------------------------------------===//

static void Define(std::vector<char> &Buf, const char *Macro,
                   const char *Val = "1") {
  const char *Def = "#define ";
  Buf.insert(Buf.end(), Def, Def+strlen(Def));
  Buf.insert(Buf.end(), Macro, Macro+strlen(Macro));
  Buf.push_back(' ');
  Buf.insert(Buf.end(), Val, Val+strlen(Val));
  Buf.push_back('\n');
}

/// DefineStd - Define a macro name and standard variants.  For example if
/// MacroName is "unix", then this will define "__unix", "__unix__", and "unix"
/// when in GNU mode.
static void DefineStd(std::vector<char> &Buf, const char *MacroName,
                      const LangOptions &Opts) {
  assert(MacroName[0] != '_' && "Identifier should be in the user's namespace");

  // If in GNU mode (e.g. -std=gnu99 but not -std=c99) define the raw identifier
  // in the user's namespace.
  if (Opts.GNUMode)
    Define(Buf, MacroName);

  // Define __unix.
  llvm::SmallString<20>