dnl
dnl ACQGL_TRYLINK_QT(cxxflags, libs [, ACTION-IF-OK [, ACTION-IF-NOT-OK ]])
dnl
AC_DEFUN(ACQGL_TRYLINK_QT,
[
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
saved_cxxflags=$CXXFLAGS
saved_libs=$LIBS
CXXFLAGS="$CXXFLAGS $1"
LIBS="$LIBS $2"
AC_TRY_LINK([
#include <qapplication.h>
#include <qpushbutton.h>
#include <qgl.h>
],
[
	int i;
	char **c = NULL;
	QGLWidget glw(); /* we need qgl support */
	QApplication a(i, c); /* autoconfs main() is broken */
	QPushButton hello("Hello world", 0);
	hello.resize(100, 30);
	a.setMainWidget(&hello);
	a.exec();
],
[ ifelse([$3], , :, [$3]) ],
[ ifelse([$4], , :, [$4]) ])
CXXFLAGS=$saved_cxxflags
LIBS=$saved_libs
AC_LANG_RESTORE
])

dnl
dnl ACQGL_PATH_QT(MINIMUM-VERSION, [ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]])
dnl
AC_DEFUN(ACQGL_PATH_QT,
[
AC_LANG_SAVE
AC_LANG_CPLUSPLUS
AC_ARG_WITH(qt,[  --with-qt=DIR Directory where QT is installed ],
	    acqgl_qt_dir="$withval", acqgl_qt_dir="$QTDIR")

dnl have a QTDIR? check linking with -lqt-mt or -lqt
if test ! x$acqgl_qt_dir = x; then
  AC_MSG_CHECKING(for Qt)
  ACQGL_TRYLINK_QT(
  [-I$acqgl_qt_dir/include],
  [-L$acqgl_qt_dir/lib -lqt],
  [
    acqgl_qt_cflags="-I$acqgl_qt_dir/include"
    acqgl_qt_libs="-L$acqgl_qt_dir/lib -lqt"
    acqgl_qt_moc="$acqgl_qt_dir/bin/moc"
    acqgl_qt_uic="$acqgl_qt_dir/bin/uic"
    acqgl_qt_found="yes"
  ],
    [ acqgl_qt_found="no" ]
  )


  
    ACQGL_TRYLINK_QT(
    [-I$acqgl_qt_dir/include],
    [-L$acqgl_qt_dir/lib -lqt-mt],
    [
      acqgl_qt_cflags="-I$acqgl_qt_dir/include"
      acqgl_qt_libs="-L$acqgl_qt_dir/lib -lqt-mt"
      acqgl_qt_moc="$acqgl_qt_dir/bin/moc"
      acqgl_qt_uic="$acqgl_qt_dir/bin/uic"
      acqgl_qt_found="yes"
    ],
    [ acqgl_qt_found="no" ]
    )


dnl dont have QTDIR, try with system defaults then
else
  AC_PATH_PROG(acqgl_qt_moc, moc, FAILED, $PATH)
  AC_PATH_PROG(acqgl_qt_uic, uic, FAILED, $PATH)
  if test x$acqgl_qt_moc = xFAILED -o x$acqgl_qt_uic = xFAILED; then
    acqgl_qt_found="no"
  else
    AC_MSG_CHECKING(for Qt)
    ACQGL_TRYLINK_QT(
    [-I/usr/include/qt],
    [-lqt],
    [
      acqgl_qt_cflags="-I/usr/include/qt"
      acqgl_qt_libs="-lqt"
      acqgl_qt_found="yes"
    ],
    [
      ACQGL_TRYLINK_QT(
      [-I/usr/include/qt],
      [-lqt-mt],
      [
        acqgl_qt_cflags="-I/usr/include/qt"
        acqgl_qt_libs="-lqt-mt"
        acqgl_qt_found="yes"
      ],
      [ acqgl_qt_found="no" ]
      )
    ])
  fi
fi

if test x$acqgl_qt_found = xyes; then
  AC_MSG_RESULT([yes])
  ifelse([$2], , :, [$2])
else
  AC_MSG_RESULT([no])
  ifelse([$3], , :, [$3])
fi
])