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/*============================================================================
  CMake - Cross Platform Makefile Generator
  Copyright 2000-2009 Kitware, Inc., Insight Software Consortium

  Distributed under the OSI-approved BSD License (the "License");
  see accompanying file Copyright.txt for details.

  This software is distributed WITHOUT ANY WARRANTY; without even the
  implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the License for more information.
============================================================================*/
#include "cmGlobalMSYSMakefileGenerator.h"

#include "cmLocalUnixMakefileGenerator3.h"
#include "cmMakefile.h"
#include "cmake.h"
#include <cmsys/FStream.hxx>

cmGlobalMSYSMakefileGenerator::cmGlobalMSYSMakefileGenerator(cmake* cm)
  : cmGlobalUnixMakefileGenerator3(cm)
{
  this->FindMakeProgramFile = "CMakeMSYSFindMake.cmake";
  this->ForceUnixPaths = true;
  this->ToolSupportsColor = true;
  this->UseLinkScript = false;
  cm->GetState()->SetMSYSShell(true);
}

std::string cmGlobalMSYSMakefileGenerator::FindMinGW(
  std::string const& makeloc)
{
  std::string fstab = makeloc;
  fstab += "/../etc/fstab";
  cmsys::ifstream fin(fstab.c_str());
  std::string path;
  std::string mount;
  std::string mingwBin;
  while (fin) {
    fin >> path;
    fin >> mount;
    if (mount == "/mingw") {
      mingwBin = path;
      mingwBin += "/bin";
    }
  }
  return mingwBin;
}

void cmGlobalMSYSMakefileGenerator::EnableLanguage(
  std::vector<std::string> const& l, cmMakefile* mf, bool optional)
{
  this->FindMakeProgram(mf);
  std::string makeProgram = mf->GetRequiredDefinition("CMAKE_MAKE_PROGRAM");
  std::vector<std::string> locations;
  std::string makeloc = cmSystemTools::GetProgramPath(makeProgram.c_str());
  locations.push_back(this->FindMinGW(makeloc));
  locations.push_back(makeloc);
  locations.push_back("/mingw/bin");
  locations.push_back("c:/mingw/bin");
  std::string tgcc = cmSystemTools::FindProgram("gcc", locations);
  std::string gcc = "gcc.exe";
  if (!tgcc.empty()) {
    gcc = tgcc;
  }
  std::string tgxx = cmSystemTools::FindProgram("g++", locations);
  std::string gxx = "g++.exe";
  if (!tgxx.empty()) {
    gxx = tgxx;
  }
  std::string trc = cmSystemTools::FindProgram("windres", locations);
  std::string rc = "windres.exe";
  if (!trc.empty()) {
    rc = trc;
  }
  mf->AddDefinition("MSYS", "1");
  mf->AddDefinition("CMAKE_GENERATOR_CC", gcc.c_str());
  mf->AddDefinition("CMAKE_GENERATOR_CXX", gxx.c_str());
  mf->AddDefinition("CMAKE_GENERATOR_RC", rc.c_str());
  this->cmGlobalUnixMakefileGenerator3::EnableLanguage(l, mf, optional);

  if (!mf->IsSet("CMAKE_AR") && !this->CMakeInstance->GetIsInTryCompile() &&
      !(1 == l.size() && l[0] == "NONE")) {
    cmSystemTools::Error(
      "CMAKE_AR was not found, please set to archive program. ",
      mf->GetDefinition("CMAKE_AR"));
  }
}

void cmGlobalMSYSMakefileGenerator::GetDocumentation(
  cmDocumentationEntry& entry)
{
  entry.Name = cmGlobalMSYSMakefileGenerator::GetActualName();
  entry.Brief = "Generates MSYS makefiles.";
}