################################################################################
# Check for GNU Make (sulphur).
################################################################################
AC_DEFUN([AC_PROG_GNU_MAKE],
[
  AC_CACHE_CHECK(for GNU make,_cv_gnu_make_command,
    [
      _cv_gnu_make_command='echo GNU make is missing.'
      for a in "$MAKE" make gmake gnumake ; do
        if ($a --version 2> /dev/null | grep -s GNU 2>/dev/null 1>/dev/null);  then
           _cv_gnu_make_command=`which $a`;
           break;
        fi
      done ;
    ])
  GNU_MAKE_CMD=$_cv_gnu_make_command
  AC_SUBST(GNU_MAKE_CMD)
])
################################################################################
# Check for Qt (sulphur).
# Outputs: QT_INC_FLAGS, QT_LIB_FLAGS,
#          QT_QMAKE, QT_MOC, QT_UIC, QT_LUPDATE, QT_LRELEASE
#	   QT_VERSION, HAVE_QT
# Prefers newer versions.
################################################################################
AC_DEFUN([AC_PATH_QT],
[
  ########################################
  # Initialize local variables.
  ########################################
  # General variables.
  qt_mission_impossible=false
  # Variables for includes.
  qt_inc_dir=false
  qt_inc_version=false
  qt_test_header=qglobal.h
  qt_inc_path="`ls -d /usr/lib/qt-3*/include 2>/dev/null`
	       `ls -d /usr/lib/qt3*/include 2>/dev/null`
	       `ls -d /usr/local/lib/qt-3*/include 2>/dev/null`
	       `ls -d /usr/local/lib/qt3*/include 2>/dev/null`
	       `ls -d /usr/local/qt-3*/include 2>/dev/null`
	       `ls -d /usr/local/qt3*/include 2>/dev/null`
	       `ls -d /opt/qt-3*/include 2>/dev/null`
	       `ls -d /opt/qt3*/include 2>/dev/null`
	       `ls -d /usr/lib/qt-2*/include 2>/dev/null`
	       `ls -d /usr/lib/qt2*/include 2>/dev/null`
	       `ls -d /usr/local/lib/qt-2*/include 2>/dev/null`
	       `ls -d /usr/local/lib/qt2*/include 2>/dev/null`
	       `ls -d /usr/local/qt-2*/include 2>/dev/null`
	       `ls -d /usr/local/qt2*/include 2>/dev/null`
	       `ls -d /opt/qt-2*/include 2>/dev/null`
	       `ls -d /opt/qt2*/include 2>/dev/null`
	       `ls -d /usr/lib/qt-1*/include 2>/dev/null`
	       `ls -d /usr/lib/qt1*/include 2>/dev/null`
	       `ls -d /usr/local/lib/qt-1*/include 2>/dev/null`
	       `ls -d /usr/local/lib/qt1*/include 2>/dev/null`
	       `ls -d /usr/local/qt-1*/include 2>/dev/null`
	       `ls -d /usr/local/qt1*/include 2>/dev/null`
	       `ls -d /opt/qt-1*/include 2>/dev/null`
	       `ls -d /opt/qt1*/include 2>/dev/null`
	       /usr/lib/qt/include
	       /usr/local/lib/qt/include
	       /usr/local/qt/include
	       /opt/qt/include
	       /usr/KDE/include" # TU Berlin, FB Informatik
  # Variables for libraries.
  qt_lib_dir=false
  qt_lib_version=false
  qt_test_lib=libqt.so
  qt_test_lib_mt=libqt-mt.so
  qt_version_three_lib=libqt.so.3
  qt_version_three_lib_mt=libqt-mt.so.3
  qt_version_two_lib=libqt.so.2
  qt_version_two_lib_mt=libqt-mt.so.2
  qt_link_name=-lqt

  qt_lib_path="`ls -d /usr/lib/qt-3*/lib 2>/dev/null`
	       `ls -d /usr/lib/qt3*/lib 2>/dev/null`
	       `ls -d /usr/local/lib/qt-3*/lib 2>/dev/null`
	       `ls -d /usr/local/lib/qt3*/lib 2>/dev/null`
	       `ls -d /usr/local/qt-3*/lib 2>/dev/null`
	       `ls -d /usr/local/qt3*/lib 2>/dev/null`
	       `ls -d /opt/qt-3*/lib 2>/dev/null`
	       `ls -d /opt/qt3*/lib 2>/dev/null`
	       `ls -d /usr/lib/qt-2*/lib 2>/dev/null`
	       `ls -d /usr/lib/qt2*/lib 2>/dev/null`
	       `ls -d /usr/local/lib/qt-2*/lib 2>/dev/null`
	       `ls -d /usr/local/lib/qt2*/lib 2>/dev/null`
	       `ls -d /usr/local/qt-2*/lib 2>/dev/null`
	       `ls -d /usr/local/qt2*/lib 2>/dev/null`
	       `ls -d /opt/qt-2*/lib 2>/dev/null`
	       `ls -d /opt/qt2*/lib 2>/dev/null`
	       `ls -d /usr/lib/qt-1*/lib 2>/dev/null`
	       `ls -d /usr/lib/qt1*/lib 2>/dev/null`
	       `ls -d /usr/local/lib/qt-1*/lib 2>/dev/null`
	       `ls -d /usr/local/lib/qt1*/lib 2>/dev/null`
	       `ls -d /usr/local/qt-1*/lib 2>/dev/null`
	       `ls -d /usr/local/qt1*/lib 2>/dev/null`
	       `ls -d /opt/qt-1*/lib 2>/dev/null`
	       `ls -d /opt/qt1*/lib 2>/dev/null`
	       /usr/lib/qt/lib
	       /usr/local/lib/qt/lib
	       /usr/local/qt/lib
	       /opt/qt/lib
	       /usr/KDE/lib" # TU Berlin, FB Informatik
  # Variables for programs.
  qt_bin_dir=false
  qt_bin_version=false
  qt_test_bin=moc
  qt_version_three_bin=linguist # XXX Fix me! Linguist is not needed for installation of Tipo.
  qt_version_two_bin=designer
  qt_bin_path="`ls -d /usr/lib/qt-3*/bin 2>/dev/null`
	       `ls -d /usr/lib/qt3*/bin 2>/dev/null`
	       `ls -d /usr/local/lib/qt-3*/bin 2>/dev/null`
	       `ls -d /usr/local/lib/qt3*/bin 2>/dev/null`
	       `ls -d /usr/local/qt-3*/bin 2>/dev/null`
	       `ls -d /usr/local/qt3*/bin 2>/dev/null`
	       `ls -d /opt/qt-3*/bin 2>/dev/null`
	       `ls -d /opt/qt3*/bin 2>/dev/null`
	       `ls -d /usr/lib/qt-2*/bin 2>/dev/null`
	       `ls -d /usr/lib/qt2*/bin 2>/dev/null`
	       `ls -d /usr/local/lib/qt-2*/bin 2>/dev/null`
	       `ls -d /usr/local/lib/qt2*/bin 2>/dev/null`
	       `ls -d /usr/local/qt-2*/bin 2>/dev/null`
	       `ls -d /usr/local/qt2*/bin 2>/dev/null`
	       `ls -d /opt/qt-2*/bin 2>/dev/null`
	       `ls -d /opt/qt2*/bin 2>/dev/null`
	       `ls -d /usr/lib/qt-1*/bin 2>/dev/null`
	       `ls -d /usr/lib/qt1*/bin 2>/dev/null`
	       `ls -d /usr/local/lib/qt-1*/bin 2>/dev/null`
	       `ls -d /usr/local/lib/qt1*/bin 2>/dev/null`
	       `ls -d /usr/local/qt-1*/bin 2>/dev/null`
	       `ls -d /usr/local/qt1*/bin 2>/dev/null`
	       `ls -d /opt/qt-1*/bin 2>/dev/null`
	       `ls -d /opt/qt1*/bin 2>/dev/null`
	       /usr/lib/qt/bin
	       /usr/local/lib/qt/bin
	       /usr/local/qt/bin
	       /opt/qt/bin
	       /usr/KDE/bin
	       /usr/bin
               /usr/local/bin" # /usr/KDE/bin applies to TU Berlin, FB Informatik

  ########################################
  # Initialize outputs.
  ########################################
  QT_INC_FLAGS=false QT_LIB_FLAGS=false 
  QT_QMAKE=false QT_MOC=false QT_UIC=false QT_LUPDATE=false QT_LRELEASE=false 
  QT_VERSION=false HAVE_QT=no

  ########################################
  # Setup.
  ########################################
  # Require C preprocessor.
  AC_REQUIRE([AC_PROG_CXX])
  # Require X libs and extra X libs.
  AC_REQUIRE([AC_PATH_XTRA])
  # Output message.
  echo "------------------------------------------------------------"
  AC_MSG_CHECKING(for Qt)
  echo ""
  echo ""
  # Configure options.
  AC_ARG_WITH([qt-inc],
    [  --with-qt-inc=DIR       Qt include files are in DIR])
  AC_ARG_WITH([qt-lib],
    [  --with-qt-lib=DIR       Qt library files are in DIR])
  AC_ARG_WITH([qt-bin],
    [  --with-qt-bin=DIR       Qt program files are in DIR])
  AC_ARG_WITH([qt-dir],
    [  --with-qt-dir=DIR       Qt home dir, incs in DIR/include, libs in DIR/lib, bins in DIR/bin, overrides other options])

  ########################################
  # Stage 1: Find Qt includes.
  ########################################
  echo "         Starting stage 1: finding includes."
  # Check user specified values.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_inc_dir" = false; then
      if test "x$with_qt_inc" != x; then
        if test -r $with_qt_inc/$qt_test_header; then
          qt_inc_dir="$with_qt_inc"
        fi
      fi
    fi
  fi
  if test "$qt_mission_impossible" = false; then
    if test "$qt_inc_dir" = false; then
      if test "x$with_qt_dir" != x; then
        if test -r $with_qt_dir/include/$qt_test_header; then
          qt_inc_dir="$with_qt_dir/include"
        fi
      fi
    fi
  fi
  # Look for includes in some well known dirs.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_inc_dir" = false; then
      for d in $qt_inc_path; do
        if test -r "$d/$qt_test_header"; then
          qt_inc_dir="$d"
          break;
        fi
      done
    fi
  fi
  # If we have not found Qt includes yet, our glorious quest for Qt is in vain...
  if test "$qt_mission_impossible" = false; then
    if test "$qt_inc_dir" = false; then
      qt_mission_impossible=true
      echo "         Mission impossible: Qt includes not found."
      echo "         Try one of the following commands to tell"
      echo "         configure where to find the Qt files."
      echo "         ./configure --with-qt-dir=DIR"
      echo "         ./configure --with-qt-inc=DIR --with-qt-lib=DIR --with-qt-bin=DIR"
    fi
  fi

  ########################################
  # Figure out version of header files.
  ########################################
  if test "$qt_mission_impossible" = false; then
	  headerline=`cat $qt_inc_dir/$qt_test_header | grep '^#define *QT_VERSION_STR'` ;
	  # Look for version 3.xx.
	  for headerword in $headerline; do
		versionnumber=`echo $headerword | grep '"3'` ;
		if test "x$versionnumber" != x; then
			qt_inc_version="3"
		fi
	  done ;
	  # Look for version 2.xx.
	  for headerword in $headerline; do
		versionnumber=`echo $headerword | grep '"2'` ;
		if test "x$versionnumber" != x; then
			qt_inc_version="2"
		fi
	  done ;
	  # Look for version 1.xx.
	  for headerword in $headerline; do
		versionnumber=`echo $headerword | grep '"1'` ;
		if test "x$versionnumber" != x; then
			qt_inc_version="1"
		fi
	  done ;
  fi

  # Output results for includes.
  if test "$qt_mission_impossible" = false; then
    echo "         Qt includes found in dir: $qt_inc_dir"
    echo "         Qt includes version found: $qt_inc_version"
  fi

  ########################################
  # Stage 2: Find Qt libraries
  ########################################
  echo "         Starting stage 2: finding libraries."
  # Check user specified values.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_dir" = false; then
      if test "x$with_qt_lib" != x; then
        if test -r $with_qt_lib/$qt_test_lib; then
          qt_lib_dir="$with_qt_lib"
	  qt_link_name="-lqt"
        fi
        if test -r $with_qt_lib/$qt_test_lib_mt; then
          qt_lib_dir="$with_qt_lib"
	  qt_link_name="-lqt-mt"
        fi
      fi
    fi
  fi
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_dir" = false; then
      if test "x$with_qt_dir" != x; then
        if test -r $with_qt_dir/lib/$qt_test_lib; then
          qt_lib_dir="$with_qt_dir/lib"
	  qt_link_name="-lqt"
        fi
        if test -r $with_qt_dir/lib/$qt_test_lib_mt; then
          qt_lib_dir="$with_qt_dir/lib"
	  qt_link_name="-lqt-mt"
        fi
      fi
    fi
  fi
  # Look for libraries in some well known dirs.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_dir" = false; then
      for d in $qt_lib_path; do
        if test -r "$d/$qt_test_lib"; then
          qt_lib_dir="$d"
	  qt_link_name="-lqt"
          break;
        fi
        if test -r "$d/$qt_test_lib_mt"; then
          qt_lib_dir="$d"
	  qt_link_name="-lqt-mt"
          break;
        fi
      done
    fi
  fi
  # If we have not found Qt libraries yet, our glorious quest for Qt is in vain...
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_dir" = false; then
      qt_mission_impossible=true
      echo "         Mission impossible: Qt libraries not found."
      echo "         Try one of the following commands to tell"
      echo "         configure where to find the Qt files."
      echo "         ./configure --with-qt-dir=DIR"
      echo "         ./configure --with-qt-inc=DIR --with-qt-lib=DIR --with-qt-bin=DIR"
    fi
  fi

  ########################################
  # Figure out version of library files.
  ########################################
  # Look for version 3.xx.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_version" = false; then
      if test -r "$qt_lib_dir/$qt_version_three_lib"; then
	qt_lib_version="3"
      fi
      if test -r "$qt_lib_dir/$qt_version_three_lib_mt"; then
	qt_lib_version="3"
      fi
    fi
  fi
  # Look for version 2.xx.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_version" = false; then
      if test -r "$qt_lib_dir/$qt_version_two_lib"; then
	qt_lib_version="2"
      fi
      if test -r "$qt_lib_dir/$qt_version_two_lib_mt"; then
	qt_lib_version="2"
      fi
    fi
  fi
  # Otherwise this must be version 1.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_version" = false; then
      qt_lib_version="1"
    fi
  fi
  
  # Output results for libraries.
  if test "$qt_mission_impossible" = false; then
    echo "         Qt libraries found in dir: $qt_lib_dir"
    echo "         Qt libraries version found: $qt_lib_version"
  fi

  ########################################
  # Compare versions of headers and libraries.
  # Further checks make no sense if they are not the same.
  ########################################
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_version" != "$qt_inc_version"; then
      qt_mission_impossible=true
      echo "         Mission impossible: Qt libraries version does not match Qt includes version."
      echo "         Try one of the following commands to tell"
      echo "         configure where to find the Qt files."
      echo "         ./configure --with-qt-dir=DIR"
      echo "         ./configure --with-qt-inc=DIR --with-qt-lib=DIR --with-qt-bin=DIR"
    fi
  fi

  ########################################
  # Stage 3: Find Qt programs.
  ########################################
  echo "         Starting stage 3: finding programs."
  # Check user specified values.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_bin_dir" = false; then
      if test "x$with_qt_bin" != x; then
        if test -x $with_qt_bin/$qt_test_bin; then
          qt_bin_dir="$with_qt_bin"
        fi
      fi
    fi
  fi
  if test "$qt_mission_impossible" = false; then
    if test "$qt_bin_dir" = false; then
      if test "x$with_qt_dir" != x; then
        if test -x $with_qt_dir/bin/$qt_test_bin; then
          qt_bin_dir="$with_qt_dir/bin"
        fi
      fi
    fi
  fi
  # Look for libraries in some well known dirs.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_bin_dir" = false; then
      for d in $qt_bin_path; do
        if test -x "$d/$qt_test_bin"; then
          qt_bin_dir="$d"
          break;
        fi
      done
    fi
  fi
  # If we have not found Qt programs yet, our glorious quest for Qt is in vain...
  if test "$qt_mission_impossible" = false; then
    if test "$qt_bin_dir" = false; then
      qt_mission_impossible=true
    fi
  fi

  ########################################
  # Figure out version of program files.
  ########################################
  # Look for version 3.xx.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_bin_version" = false; then
      if test -r "$qt_bin_dir/$qt_version_three_bin"; then
	qt_bin_version="3"
      fi
    fi
  fi
  # Look for version 2.xx.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_bin_version" = false; then
      if test -r "$qt_bin_dir/$qt_version_two_bin"; then
	qt_bin_version="2"
      fi
    fi
  fi
  # Otherwise this must be version 1.
  if test "$qt_mission_impossible" = false; then
    if test "$qt_bin_version" = false; then
      qt_bin_version="1"
    fi
  fi
  # Output results for programs.
  if test "$qt_mission_impossible" = false; then
    echo "         Qt programs found in dir: $qt_bin_dir"
    echo "         Qt programs version found: $qt_bin_version"
  fi

  ########################################
  # Compare versions of libraries and programs.
  # Further checks make no sense if they are not the same.
  ########################################
  if test "$qt_mission_impossible" = false; then
    if test "$qt_lib_version" != "$qt_bin_version"; then
      qt_mission_impossible=true
      echo "         Mission impossible: Qt libraries version does not match Qt programs version."
      echo "         Try one of the following commands to tell"
      echo "         configure where to find the Qt files."
      echo "         ./configure --with-qt-dir=DIR"
      echo "         ./configure --with-qt-inc=DIR --with-qt-lib=DIR --with-qt-bin=DIR"
    fi
  fi

  ########################################
  # Prepare for take off...
  ########################################
  if test "$qt_mission_impossible" = false; then
    QT_INC_FLAGS="-I$qt_inc_dir"
    QT_LIB_FLAGS="-L$qt_lib_dir $X_LIBS $qt_link_name $X_PRE_LIBS -lX11 -lXext $X_EXTRA_LIBS"
    if test "$qt_bin_version" = "1"; then
      QT_MOC=$qt_bin_dir/moc
      QT_QMAKE=/bin/false
      QT_UIC=/bin/false
      QT_LUPDATE=/bin/false
      QT_LRELEASE=/bin/false
    fi
    if test "$qt_bin_version" = "2"; then
      QT_MOC=$qt_bin_dir/moc
      QT_QMAKE=/bin/false
      QT_UIC=$qt_bin_dir/uic
      QT_LUPDATE=/bin/false
      QT_LRELEASE=/bin/false
    fi
    if test "$qt_bin_version" = "3"; then
      QT_MOC=$qt_bin_dir/moc
      QT_QMAKE=$qt_bin_dir/qmake
      QT_UIC=$qt_bin_dir/uic
      QT_LUPDATE=$qt_bin_dir/lupdate
      QT_LRELEASE=$qt_bin_dir/lrelease
    fi
    QT_VERSION=$qt_bin_version
    HAVE_QT=yes
  fi
  # Output all variables.
  echo ""
  echo "         QT_INC_FLAGS = $QT_INC_FLAGS"
  echo "         QT_LIB_FLAGS = $QT_LIB_FLAGS"
  echo "         QT_QMAKE     = $QT_QMAKE"
  echo "         QT_MOC       = $QT_MOC"
  echo "         QT_UIC       = $QT_UIC"
  echo "         QT_LUPDATE   = $QT_LUPDATE"
  echo "         QT_LRELEASE  = $QT_LRELEASE"
  echo "         QT_VERSION   = $QT_VERSION"
  echo "         HAVE_QT      = $HAVE_QT"
  echo ""
  echo "------------------------------------------------------------"
  # Output variables.
  AC_SUBST(QT_INC_FLAGS) AC_SUBST(QT_LIB_FLAGS) AC_SUBST(QT_DIR)
  AC_SUBST(QT_QMAKE) AC_SUBST(QT_MOC) AC_SUBST(QT_UIC) AC_SUBST(QT_LUPDATE) AC_SUBST(QT_LRELEASE) 
  AC_SUBST(QT_VERSION) AC_SUBST(HAVE_QT)

])