// %NO_EDIT_WARNING%
/*

Copyright (C) 2008-2018 Michael Goffioul

This file is part of Octave.

Octave is free software: you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

Octave is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Octave; see the file COPYING.  If not, see
<https://www.gnu.org/licenses/>.

*/

#if defined (HAVE_CONFIG_H)
#  include "config.h"
#endif

#include <string>
#include <cstring>
#include <map>
#include <list>
#include <algorithm>
#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <cstdlib>

#if defined (CROSS)
#  include <sys/types.h>
#  include <sys/wait.h>
#  include <unistd.h>

#  ifndef OCTAVE_UNUSED
#    define OCTAVE_UNUSED
#  endif
#else
#  include "unistd-wrappers.h"
#  include "wait-wrappers.h"
#endif

static std::map<std::string, std::string> vars;

#if ! defined (OCTAVE_VERSION)
#  define OCTAVE_VERSION %OCTAVE_CONF_VERSION%
#endif

#if ! defined (OCTAVE_PREFIX)
#  define OCTAVE_PREFIX %OCTAVE_CONF_PREFIX%
#endif

#if ! defined (OCTAVE_EXEC_PREFIX)
#  define OCTAVE_EXEC_PREFIX %OCTAVE_CONF_EXEC_PREFIX%
#endif

#include "shared-fcns.h"

#if defined (CROSS)

static int
octave_unlink_wrapper (const char *nm)
{
  return unlink (nm);
}

static bool
octave_wifexited_wrapper (int status)
{
  return WIFEXITED (status);
}

static int
octave_wexitstatus_wrapper (int status)
{
  return WEXITSTATUS (status);
}

#endif

static std::string
get_line (FILE *fp)
{
  std::ostringstream buf;

  while (true)
    {
      int c = std::fgetc (fp);

      if (c == '\n' || c == EOF)
        break;

      buf << static_cast<char> (c);
    }

  return buf.str ();
}

static std::string
get_variable (const char *name, const std::string& defval)
{
  const char *val = getenv (name);

  if (val && *val)
    return std::string (val);
  else
    return defval;
}

static std::string
quote_path (const std::string& s)
{
  if (s.find (' ') != std::string::npos && s[0] != '"')
    return '"' + s + '"';
  else
    return s;
}

static void
initialize (void)
{
  set_octave_home ();

  vars["OCTAVE_HOME"] = Voctave_home;
  vars["OCTAVE_EXEC_HOME"] = Voctave_exec_home;

  vars["SED"] = get_variable ("SED", %OCTAVE_CONF_SED%);

  vars["OCTINCLUDEDIR"]
    = get_variable ("OCTINCLUDEDIR",
                    prepend_octave_home (%OCTAVE_CONF_OCTINCLUDEDIR%));

  vars["INCLUDEDIR"]
    = get_variable ("INCLUDEDIR",
                    prepend_octave_home (%OCTAVE_CONF_INCLUDEDIR%));

  vars["LIBDIR"]
    = get_variable ("LIBDIR", prepend_octave_exec_home (%OCTAVE_CONF_LIBDIR%));

  vars["OCTLIBDIR"]
    = get_variable ("OCTLIBDIR", prepend_octave_exec_home (%OCTAVE_CONF_OCTLIBDIR%));

#if defined (OCTAVE_USE_WINDOWS_API)
  std::string DEFAULT_INCFLAGS
    = "-I" + quote_path (vars["OCTINCLUDEDIR"] + R"(\..)")
      + " -I" + quote_path (vars["OCTINCLUDEDIR"]);
#else
  std::string DEFAULT_INCFLAGS
    = "-I" + quote_path (vars["OCTINCLUDEDIR"] + "/..")
      + " -I" + quote_path (vars["OCTINCLUDEDIR"]);
#endif

  if (vars["INCLUDEDIR"] != "/usr/include")
    DEFAULT_INCFLAGS += " -I" + quote_path (vars["INCLUDEDIR"]);

  std::string DEFAULT_LFLAGS;

#if defined (OCTAVE_USE_WINDOWS_API) || defined(CROSS)

  // We'll be linking with -loctinterp and -loctave, so we need to know
  // where to find them.

  DEFAULT_LFLAGS += "-L" + quote_path (vars["OCTLIBDIR"]);
#endif

  if (vars["LIBDIR"] != "/usr/lib")
    DEFAULT_LFLAGS += " -L" + quote_path (vars["LIBDIR"]);

  vars["CPPFLAGS"] = get_variable ("CPPFLAGS", %OCTAVE_CONF_CPPFLAGS%);

  vars["INCFLAGS"] = get_variable ("INCFLAGS", DEFAULT_INCFLAGS);

  vars["F77"] = get_variable ("F77", %OCTAVE_CONF_MKOCTFILE_F77%);

  vars["FFLAGS"] = get_variable ("FFLAGS", %OCTAVE_CONF_FFLAGS%);

  vars["FPICFLAG"] = get_variable ("FPICFLAG", %OCTAVE_CONF_FPICFLAG%);

  vars["CC"] = get_variable ("CC", %OCTAVE_CONF_MKOCTFILE_CC%);

  vars["CFLAGS"] = get_variable ("CFLAGS", %OCTAVE_CONF_CFLAGS%);

  vars["CPICFLAG"] = get_variable ("CPICFLAG", %OCTAVE_CONF_CPICFLAG%);

  vars["CXX"] = get_variable ("CXX", %OCTAVE_CONF_MKOCTFILE_CXX%);

  vars["CXXFLAGS"] = get_variable ("CXXFLAGS", %OCTAVE_CONF_CXXFLAGS%);

  vars["CXXPICFLAG"] = get_variable ("CXXPICFLAG", %OCTAVE_CONF_CXXPICFLAG%);

  vars["XTRA_CFLAGS"] = get_variable ("XTRA_CFLAGS", %OCTAVE_CONF_XTRA_CFLAGS%);

  vars["XTRA_CXXFLAGS"] = get_variable ("XTRA_CXXFLAGS",
                                        %OCTAVE_CONF_XTRA_CXXFLAGS%);

  vars["AR"] = get_variable ("AR", %OCTAVE_CONF_MKOCTFILE_AR%);

  vars["RANLIB"] = get_variable ("RANLIB", %OCTAVE_CONF_MKOCTFILE_RANLIB%);

  vars["DEPEND_FLAGS"] = get_variable ("DEPEND_FLAGS",
                                       %OCTAVE_CONF_DEPEND_FLAGS%);

  vars["DEPEND_EXTRA_SED_PATTERN"]
    = get_variable ("DEPEND_EXTRA_SED_PATTERN",
                    %OCTAVE_CONF_DEPEND_EXTRA_SED_PATTERN%);

  vars["DL_LD"] = get_variable ("DL_LD", %OCTAVE_CONF_MKOCTFILE_DL_LD%);

  vars["DL_LDFLAGS"] = get_variable ("DL_LDFLAGS",
                                     %OCTAVE_CONF_MKOCTFILE_DL_LDFLAGS%);

  vars["RDYNAMIC_FLAG"] = get_variable ("RDYNAMIC_FLAG",
                                        %OCTAVE_CONF_RDYNAMIC_FLAG%);

  vars["LIBOCTAVE"] = "-loctave";

  vars["LIBOCTINTERP"] = "-loctinterp";

  vars["READLINE_LIBS"] = "-lreadline";

  vars["LAPACK_LIBS"] = get_variable ("LAPACK_LIBS", %OCTAVE_CONF_LAPACK_LIBS%);

  vars["BLAS_LIBS"] = get_variable ("BLAS_LIBS", %OCTAVE_CONF_BLAS_LIBS%);

  vars["FFTW3_LDFLAGS"] = get_variable ("FFTW3_LDFLAGS",
                                        %OCTAVE_CONF_FFTW3_LDFLAGS%);

  vars["FFTW3_LIBS"] = get_variable ("FFTW3_LIBS", %OCTAVE_CONF_FFTW3_LIBS%);

  vars["FFTW3F_LDFLAGS"] = get_variable ("FFTW3F_LDFLAGS",
                                         %OCTAVE_CONF_FFTW3F_LDFLAGS%);

  vars["FFTW3F_LIBS"] = get_variable ("FFTW3F_LIBS", %OCTAVE_CONF_FFTW3F_LIBS%);

  vars["LIBS"] = get_variable ("LIBS", %OCTAVE_CONF_LIBS%);

  vars["FLIBS"] = get_variable ("FLIBS", %OCTAVE_CONF_FLIBS%);

  vars["OCTAVE_LINK_DEPS"] = get_variable ("OCTAVE_LINK_DEPS",
                                           %OCTAVE_CONF_MKOCTFILE_OCTAVE_LINK_DEPS%);

  vars["OCTAVE_LINK_OPTS"] = get_variable ("OCTAVE_LINK_OPTS",
                                           %OCTAVE_CONF_OCTAVE_LINK_OPTS%);

  vars["OCT_LINK_DEPS"] = get_variable ("OCT_LINK_DEPS",
                                        %OCTAVE_CONF_MKOCTFILE_OCT_LINK_DEPS%);

  vars["OCT_LINK_OPTS"] = get_variable ("OCT_LINK_OPTS",
                                        %OCTAVE_CONF_OCT_LINK_OPTS%);

  vars["LD_CXX"] = get_variable ("LD_CXX", %OCTAVE_CONF_MKOCTFILE_LD_CXX%);

  vars["LDFLAGS"] = get_variable ("LDFLAGS", %OCTAVE_CONF_LDFLAGS%);

  vars["LD_STATIC_FLAG"] = get_variable ("LD_STATIC_FLAG",
                                         %OCTAVE_CONF_LD_STATIC_FLAG%);

  vars["LFLAGS"] = get_variable ("LFLAGS", DEFAULT_LFLAGS);

  vars["F77_INTEGER8_FLAG"] = get_variable ("F77_INTEGER8_FLAG",
                                            %OCTAVE_CONF_F77_INTEGER_8_FLAG%);
  vars["ALL_FFLAGS"] = vars["FFLAGS"] + ' ' + vars["F77_INTEGER8_FLAG"];

  vars["ALL_CFLAGS"]
    = vars["INCFLAGS"] + ' ' + vars["XTRA_CFLAGS"] + ' ' + vars["CFLAGS"];

  vars["ALL_CXXFLAGS"]
    = vars["INCFLAGS"] + ' ' + vars["XTRA_CXXFLAGS"] + ' ' + vars["CXXFLAGS"];

  vars["ALL_LDFLAGS"]
    = vars["LD_STATIC_FLAG"] + ' ' + vars["CPICFLAG"] + ' ' + vars["LDFLAGS"];

  vars["OCTAVE_LIBS"]
    = (vars["LIBOCTINTERP"] + ' ' + vars["LIBOCTAVE"] + ' '
       + vars["SPECIAL_MATH_LIB"]);

  vars["FFTW_LIBS"] = vars["FFTW3_LDFLAGS"] + ' ' + vars["FFTW3_LIBS"] + ' '
                      + vars["FFTW3F_LDFLAGS"] + ' ' + vars["FFTW3F_LIBS"];
}

static std::string usage_msg = "usage: mkoctfile [options] file ...";

static std::string version_msg = "mkoctfile, version " OCTAVE_VERSION;

static bool debug = false;

static std::string help_msg =
"\n"
"Options:\n"
"\n"
"  -h, -?, --help          Print this message.\n"
"\n"
"  -IDIR                   Add -IDIR to compile commands.\n"
"\n"
"  -idirafter DIR          Add -idirafter DIR to compile commands.\n"
"\n"
"  -DDEF                   Add -DDEF to compile commands.\n"
"\n"
"  -lLIB                   Add library LIB to link command.\n"
"\n"
"  -LDIR                   Add -LDIR to link command.\n"
"\n"
"  -M, --depend            Generate dependency files (.d) for C and C++\n"
"                          source files.\n"
#if ! defined (OCTAVE_USE_WINDOWS_API)
"\n"
"  -pthread                Add -pthread to link command.\n"
#endif
"\n"
"  -RDIR                   Add -RDIR to link command.\n"
"\n"
"  -Wl,...                 Pass flags though the linker like -Wl,-rpath=...\n"
"\n"
"  -W...                   Pass flags though the compiler like -Wa,OPTION.\n"
"\n"
"  -c, --compile           Compile, but do not link.\n"
"\n"
"  -o FILE, --output FILE  Output filename.  Default extension is .oct\n"
"                          (or .mex if --mex is specified) unless linking\n"
"                          a stand-alone executable.\n"
"\n"
"  -g                      Enable debugging options for compilers.\n"
"\n"
"  -p VAR, --print VAR     Print configuration variable VAR.  Recognized\n"
"                          variables are:\n"
"\n"
"                            ALL_CFLAGS                  INCFLAGS\n"
"                            ALL_CXXFLAGS                INCLUDEDIR\n"
"                            ALL_FFLAGS                  LAPACK_LIBS\n"
"                            ALL_LDFLAGS                 LD_CXX\n"
"                            AR                          LDFLAGS\n"
"                            BLAS_LIBS                   LD_STATIC_FLAG\n"
"                            CC                          LFLAGS\n"
"                            CFLAGS                      LIBDIR\n"
"                            CPICFLAG                    LIBOCTAVE\n"
"                            CPPFLAGS                    LIBOCTINTERP\n"
"                            CXX                         LIBS\n"
"                            CXXFLAGS                    OCTAVE_EXEC_HOME\n"
"                            CXXPICFLAG                  OCTAVE_HOME\n"
"                            DEPEND_EXTRA_SED_PATTERN    OCTAVE_LIBS\n"
"                            DEPEND_FLAGS                OCTAVE_LINK_DEPS\n"
"                            DL_LD                       OCTAVE_LINK_OPTS\n"
"                            DL_LDFLAGS                  OCTINCLUDEDIR\n"
"                            F77                         OCTLIBDIR\n"
"                            F77_INTEGER8_FLAG           OCT_LINK_DEPS\n"
"                            FFLAGS                      OCT_LINK_OPTS\n"
"                            FFTW3F_LDFLAGS              RANLIB\n"
"                            FFTW3F_LIBS                 RDYNAMIC_FLAG\n"
"                            FFTW3_LDFLAGS               READLINE_LIBS\n"
"                            FFTW3_LIBS                  SED\n"
"                            FFTW_LIBS                   SPECIAL_MATH_LIB\n"
"                            FLIBS                       XTRA_CFLAGS\n"
"                            FPICFLAG                    XTRA_CXXFLAGS\n"
"\n"
"  --link-stand-alone      Link a stand-alone executable file.\n"
"\n"
"  --mex                   Assume we are creating a MEX file.  Set the\n"
"                          default output extension to \".mex\".\n"
"\n"
"  -s, --strip             Strip output file.\n"
"\n"
"  -n, --just-print, --dry-run\n"
"                          Print commands, but do not execute them.\n"
"\n"
"  -v, --verbose           Echo commands as they are executed.\n"
"\n"
"  FILE                    Compile or link FILE.  Recognized file types are:\n"
"\n"
"                            .c    C source\n"
"                            .cc   C++ source\n"
"                            .cp   C++ source\n"
"                            .cpp  C++ source\n"
"                            .CPP  C++ source\n"
"                            .cxx  C++ source\n"
"                            .c++  C++ source\n"
"                            .C    C++ source\n"
"                            .f    Fortran source (fixed form)\n"
"                            .F    Fortran source (fixed form)\n"
"                            .f90  Fortran source (free form)\n"
"                            .F90  Fortran source (free form)\n"
"                            .o    object file\n"
"                            .a    library file\n"
#if defined (_MSC_VER)
"                            .lib  library file\n"
#endif
"\n";

static std::string
basename (const std::string& s, bool strip_path = false)
{
  std::string retval;

  size_t pos = s.rfind ('.');

  if (pos == std::string::npos)
    retval = s;
  else
    retval = s.substr (0, pos);

  if (strip_path)
    {
      size_t p1 = retval.rfind ('/'), p2 = retval.rfind ('\\');

      pos = (p1 != std::string::npos && p2 != std::string::npos
             ? std::max (p1, p2) : (p2 != std::string::npos ? p2 : p1));

      if (pos != std::string::npos)
        retval = retval.substr (++pos, std::string::npos);
    }

  return retval;
}

inline bool
starts_with (const std::string& s, const std::string& prefix)
{
  return (s.length () >= prefix.length () && s.find (prefix) == 0);
}

inline bool
ends_with (const std::string& s, const std::string& suffix)
{
  return (s.length () >= suffix.length ()
          && s.rfind (suffix) == s.length () - suffix.length ());
}

static int
run_command (const std::string& cmd, bool printonly = false)
{
  if (printonly)
    {
      std::cout << cmd << std::endl;
      return 0;
    }

  if (debug)
    std::cout << cmd << std::endl;

  int result = system (cmd.c_str ());

  if (octave_wifexited_wrapper (result))
    result = octave_wexitstatus_wrapper (result);

  return result;
}

bool
is_true (const std::string& s)
{
  return (s == "yes" || s == "true");
}

int
main (int argc, char **argv)
{
  initialize ();

  if (argc == 1)
    {
      std::cout << usage_msg << std::endl;
      return 1;
    }

  if (argc == 2 && (! strcmp (argv[1], "-v")
                    || ! strcmp (argv[1], "-version")
                    || ! strcmp (argv[1], "--version")))
    {
      std::cout << version_msg << std::endl;
      return 0;
    }

  std::list<std::string> cfiles, ccfiles, f77files;
  std::string output_ext = ".oct";
  std::string objfiles, libfiles, octfile, outputfile;
  std::string incflags, defs, ldflags, pass_on_options;
  bool strip = false;
  bool no_oct_file_strip_on_this_platform = is_true ("%NO_OCT_FILE_STRIP%");
  bool compile_only = false;
  bool link_stand_alone = false;
  bool depend = false;
  bool printonly = false;

  for (int i = 1; i < argc; i++)
    {
      std::string arg = argv[i];

      std::string file;

      if (ends_with (arg, ".c"))
        {
          file = arg;
          cfiles.push_back (file);
        }
      else if (ends_with (arg, ".cc") || ends_with (arg, ".cp")
               || ends_with (arg, ".cpp") || ends_with (arg, ".CPP")
               || ends_with (arg, ".cxx") || ends_with (arg, ".c++")
               || ends_with (arg, ".C"))
        {
          file = arg;
          ccfiles.push_back (file);
        }
      else if (ends_with (arg, ".f") || ends_with (arg, ".F")
               || ends_with (arg, "f90") || ends_with (arg, ".F90"))
        {
          file = arg;
          f77files.push_back (file);
        }
      else if (ends_with (arg, ".o") || ends_with (arg, ".obj"))
        {
          file = arg;
          objfiles += (' ' + quote_path (arg));
        }
      else if (ends_with (arg, ".lib") || ends_with (arg, ".a"))
        {
          file = arg;
          libfiles += (' ' + quote_path (arg));
        }
      else if (arg == "-d" || arg == "-debug" || arg == "--debug"
               || arg == "-v" || arg == "-verbose" ||  arg == "--verbose")
        {
          debug = true;
          if (vars["CC"] == "cc-msvc")
            vars["CC"] += " -d";
          if (vars["CXX"] == "cc-msvc")
            vars["CXX"] += " -d";
          if (vars["DL_LD"] == "cc-msvc")
            vars["DL_LD"] += " -d";
        }
      else if (arg == "-h" || arg == "-?" || arg == "-help" || arg == "--help")
        {
          std::cout << usage_msg << std::endl;
          std::cout << help_msg << std::endl;
          return 0;
        }
      else if (starts_with (arg, "-I"))
        {
          incflags += (' ' + quote_path (arg));
        }
      else if (arg == "-idirafter")
        {
          if (i < argc-1)
            {
              arg = argv[++i];
              incflags += (" -idirafter " + arg);
            }
          else
            std::cerr << "mkoctfile: include directory name missing"
                      << std::endl;
        }
      else if (starts_with (arg, "-D"))
        {
          defs += (' ' + arg);
        }
      else if (arg == "-largeArrayDims" || arg == "-compatibleArrayDims")
        {
          std::cout << "warning: -largeArrayDims and -compatibleArrayDims are accepted for compatibility, but ignored" << std::endl;
        }
      else if (starts_with (arg, "-Wl,") || starts_with (arg, "-l")
               || starts_with (arg, "-L") || starts_with (arg, "-R"))
        {
          ldflags += (' ' + arg);
        }
#if ! defined (OCTAVE_USE_WINDOWS_API)
      else if (arg == "-pthread")
        {
          ldflags += (' ' + arg);
        }
#endif
      else if (arg == "-M" || arg == "-depend" || arg == "--depend")
        {
          depend = true;
        }
      else if (arg == "-o" || arg == "-output" || arg == "--output")
        {
          if (i < argc-1)
            {
              arg = argv[++i];
              outputfile = arg;
            }
          else
            std::cerr << "mkoctfile: output filename missing" << std::endl;
        }
      else if (arg == "-n" || arg == "--dry-run" || arg == "--just-print")
        {
          printonly = true;
        }
      else if (arg == "-p" || arg == "-print" || arg == "--print")
        {
          if (i < argc-1)
            {
              arg = argv[++i];
              std::cout << vars[arg] << std::endl;
              return 0;
            }
          else
            std::cerr << "mkoctfile: --print requires argument" << std::endl;
        }
      else if (arg == "-s" || arg == "-strip" || arg == "--strip")
        {
          if (no_oct_file_strip_on_this_platform)
            std::cerr << "mkoctfile: stripping disabled on this platform"
                      << std::endl;
          else
            strip = true;
        }
      else if (arg == "-c" || arg == "-compile" || arg == "--compile")
        {
          compile_only = true;
        }
      else if (arg == "-g")
        {
          vars["ALL_CFLAGS"] += " -g";
          vars["ALL_CXXFLAGS"] += " -g";
          vars["ALL_FFLAGS"] += " -g";
        }
      else if (arg == "-link-stand-alone" || arg == "--link-stand-alone")
        {
          link_stand_alone = true;
        }
      else if (arg == "-mex" || arg == "--mex")
        {
          incflags += " -I.";
#if defined (_MSC_VER)
          ldflags += " -Wl,-export:mexFunction";
#endif
          output_ext = ".mex";
        }
      else if (starts_with (arg, "-W"))
        {
          pass_on_options += (' ' + arg);
        }
      else if (starts_with (arg, "-O"))
        {
          pass_on_options += (' ' + arg);
        }
      else if (starts_with (arg, "-"))
        {
          // Pass through any unrecognized options.
          pass_on_options += (' ' + arg);
          // Check for an additional argument following the option.
          // However, don't check the final position which is typically a file
          if (i < argc-2)
            {
              arg = argv[i+1];
              if (arg[0] != '-')
                {
                  pass_on_options += (' ' + arg);
                  i++;
                }
            }
        }
      else
        {
          std::cerr << "mkoctfile: unrecognized argument " << arg << std::endl;
          return 1;
        }

      if (! file.empty () && octfile.empty ())
        octfile = file;
    }

  if (output_ext ==  ".mex"
      && vars["ALL_CFLAGS"].find ("-g") != std::string::npos)
    {
      defs += " -DMEX_DEBUG";
    }

  if (compile_only
      && (cfiles.size () + ccfiles.size () + f77files.size ()) > 1)
    {
      std::cerr << "mkoctfile: may not use -c and -o with multiple source files"
                << std::endl;
      return 1;
    }

  std::string output_option;

  if (link_stand_alone)
    {
      if (! outputfile.empty ())
        output_option = "-o " + outputfile;
    }
  else
    {
      if (! outputfile.empty ())
        {
          octfile = outputfile;
          size_t len = octfile.length ();
          size_t len_ext = output_ext.length ();
          if (octfile.substr (len-len_ext) != output_ext)
            octfile += output_ext;
        }
      else
        octfile = basename (octfile, true) + output_ext;
    }

  if (depend)
    {
      for (const auto& f : cfiles)
        {
          std::string dfile = basename (f, true) + ".d", line;

          octave_unlink_wrapper (dfile.c_str ());

          std::string cmd
            = (vars["CC"] + ' ' + vars["DEPEND_FLAGS"] + ' '
               + vars["CPPFLAGS"] + ' ' + vars["ALL_CFLAGS"] + ' '
               + incflags  + ' ' + defs + ' ' + quote_path (f));

          FILE *fd = popen (cmd.c_str (), "r");
          std::ofstream fo (dfile.c_str ());
          size_t pos;
          while (! feof (fd))
            {
              line = get_line (fd);
              if ((pos = line.rfind (".o:")) != std::string::npos)
                {
                  size_t spos = line.rfind ('/', pos);
                  std::string ofile =
                    (spos == std::string::npos
                     ? line.substr (0, pos+2)
                     : line.substr (spos+1, pos-spos+1));
                  fo << "pic/" << ofile << ' ' << ofile << ' '
                     << dfile << line.substr (pos) << std::endl;
                }
              else
                fo << line << std::endl;
            }
          pclose (fd);
          fo.close ();
        }

      for (const auto& f : ccfiles)
        {
          std::string dfile = basename (f, true) + ".d", line;

          octave_unlink_wrapper (dfile.c_str ());

          std::string cmd
            = (vars["CXX"] + ' ' + vars["DEPEND_FLAGS"] + ' '
               + vars["CPPFLAGS"] + ' ' + vars["ALL_CXXFLAGS"] + ' '
               + incflags  + ' ' + defs + ' ' + quote_path (f));

          FILE *fd = popen (cmd.c_str (), "r");
          std::ofstream fo (dfile.c_str ());
          size_t pos;
          while (! feof (fd))
            {
              line = get_line (fd);
              if ((pos = line.rfind (".o:")) != std::string::npos)
                {
                  size_t spos = line.rfind ('/', pos);
                  std::string ofile =
                    (spos == std::string::npos
                     ? line.substr (0, pos+2)
                     : line.substr (spos+1, pos-spos+1));
                  fo << "pic/" << ofile << ' ' << ofile << ' '
                     << dfile << line.substr (pos+2) << std::endl;
                }
              else
                fo << line << std::endl;
            }
          pclose (fd);
          fo.close ();
        }

      return 0;
    }

  for (const auto& f : f77files)
    {
      if (! vars["F77"].empty ())
        {
          std::string b = basename (f, true);
          std::string o;
          if (compile_only)
            {
              // There will be only one source file, so we are done
              // after executing the command below and we don't need to
              // keep track of the object file name.

              if (! outputfile.empty ())
                o = outputfile;
              else
                o = b + ".o";
            }
          else
            {
              o = b + ".o";
              objfiles += (' ' + o);
            }

          std::string cmd
            = (vars["F77"] + " -c " + vars["FPICFLAG"] + ' '
               + vars["ALL_FFLAGS"] + ' ' + incflags + ' ' + defs + ' '
               + pass_on_options + ' ' + f + " -o " + o);

          int status = run_command (cmd, printonly);

          if (compile_only || status)
            return status;
        }
      else
        {
          std::cerr << "mkoctfile: no way to compile Fortran file " << f
                    << std::endl;
          return 1;
        }
    }

  for (const auto& f : cfiles)
    {
      if (! vars["CC"].empty ())
        {
          std::string b = basename (f, true);
          std::string o;
          if (compile_only)
            {
              // There will be only one source file, so we are done
              // after executing the command below and we don't need to
              // keep track of the object file name.

              if (! outputfile.empty ())
                o = outputfile;
              else
                o = b + ".o";
            }
          else
            {
              o = b + ".o";
              objfiles += (' ' + o);
            }

          std::string cmd
            = (vars["CC"] + " -c " + vars["CPPFLAGS"] + ' '
               + vars["CPICFLAG"] + ' ' + vars["ALL_CFLAGS"] + ' '
               + pass_on_options + ' ' + incflags + ' ' + defs + ' '
               + quote_path (f) + " -o " + quote_path (o));

          int status = run_command (cmd, printonly);

          if (compile_only || status)
            return status;
        }
      else
        {
          std::cerr << "mkoctfile: no way to compile C file " << f
                    << std::endl;
          return 1;
        }
    }

  for (const auto& f : ccfiles)
    {
      if (! vars["CXX"].empty ())
        {
          std::string b = basename (f, true);
          std::string o;
          if (compile_only)
            {
              // There will be only one source file, so we are done
              // after executing the command below and we don't need to
              // keep track of the object file name.

              if (! outputfile.empty ())
                o = outputfile;
              else
                o = b + ".o";
            }
          else
            {
              o = b + ".o";
              objfiles += (' ' + o);
            }

          std::string cmd
            = (vars["CXX"] + " -c " + vars["CPPFLAGS"] + ' '
               + vars["CXXPICFLAG"] + ' ' + vars["ALL_CXXFLAGS"] + ' '
               + pass_on_options + ' ' + incflags + ' ' + defs + ' '
               + quote_path (f) + " -o " + quote_path (o));

          int status = run_command (cmd, printonly);

          if (compile_only || status)
            return status;
        }
      else
        {
          std::cerr << "mkoctfile: no way to compile C++ file " << f
                    << std::endl;
          return 1;
        }
    }

  if (objfiles.empty ())
    {
      std::cerr << "mkoctfile: no objects to link" << std::endl;
      return 1;
    }

  std::string octave_libs;
#if defined (OCTAVE_USE_WINDOWS_API) || defined(CROSS)
  octave_libs = "-loctinterp -loctave";
#endif

  if (link_stand_alone)
    {
      if (! vars["LD_CXX"].empty ())
        {
          std::string cmd
            = (vars["LD_CXX"] + ' ' + vars["CPPFLAGS"] + ' '
               + vars["ALL_CXXFLAGS"] + ' ' + vars["RDYNAMIC_FLAG"] + ' '
               + vars["ALL_LDFLAGS"] + ' ' + pass_on_options + ' '
               + output_option + ' ' + objfiles + ' ' + libfiles + ' '
               + ldflags + ' ' + vars["LFLAGS"] + ' ' + octave_libs + ' '
               + vars["OCTAVE_LINK_OPTS"] + ' ' + vars["OCTAVE_LINK_DEPS"]);

          int status = run_command (cmd, printonly);

          if (status)
            return status;
        }
      else
        {
          std::cerr
            << "mkoctfile: no way to link stand-alone executable file"
            << std::endl;
          return 1;
        }
    }
  else
    {
      std::string cmd
        = (vars["DL_LD"] + ' ' + vars["ALL_CXXFLAGS"] + ' '
           + vars["DL_LDFLAGS"] + ' ' + pass_on_options
           + " -o " + octfile + ' ' + objfiles + ' ' + libfiles + ' '
           + ldflags + ' ' + vars["LFLAGS"] + ' ' + octave_libs + ' '
           + vars["OCT_LINK_OPTS"] + ' ' + vars["OCT_LINK_DEPS"]);

      int status = run_command (cmd, printonly);

      if (status)
        return status;
    }

  if (strip)
    {
      std::string cmd = "strip " + octfile;

      int status = run_command (cmd, printonly);

      if (status)
        return status;
    }

  return 0;
}