dnl
dnl configure.in for Ingar's Sudoku Solver
dnl
dnl see also http://qtnode.net/wiki/Qt_with_autotools
dnl

AC_INIT([Sudoku Solver], [0.1.0], [ingar@osirion.org], [sudoku])

AC_CONFIG_HEADERS(src/config.h)

AM_INIT_AUTOMAKE
AC_PROG_CC
AC_PROG_CXX

dnl
dnl Qt installation prefix
dnl
AC_MSG_CHECKING(Qt installation prefix)
QTDIR=xxx
AC_ARG_WITH([qt-prefix],
             AC_HELP_STRING([--with-qt-prefix=], [to specify the path to the Qt-4.8.0 installation prefix.]),
             [QTPATHS="$withval"],
             [QTPATHS="/usr /usr/qt4 /opt/qt4"])

for x in $QTPATHS; do
    if test -d $x ; then
       QTDIR="$x"
    fi
done
if test $QTDIR = xxx ; then
   AC_MSG_ERROR(Could not locate QT 4.1)
fi
AC_MSG_RESULT($QTDIR)

dnl
dnl Qt includes directory
dnl
AC_MSG_CHECKING(Qt includes directory)

AC_ARG_WITH([qt-includes],
             AC_HELP_STRING([--with-qt-includes=], [to specify the path to directory containing the the Qt-4.8.0 includes.]),
             [QTINCLUDEDIR="$withval"],
             [QTINCLUDEDIR="$QTDIR/include"])
AC_MSG_RESULT($QTINCLUDEDIR)

dnl
dnl libraries directory
dnl             
AC_MSG_CHECKING(Qt libraries directory)
AC_ARG_WITH([qt-libraries],
             AC_HELP_STRING([--with-qt-libraries=], [to specify the path to directory containing the the Qt-4.8.0 libraries.]),
             [QTLIBDIR="$withval"],
             [QTLIBDIR="$QTDIR/lib"])
AC_MSG_RESULT($QTLIBDIR)

host=`uname -a` # AC_CANONICAL_HOST is broken at the time of this writing.
case $host in
  MINGW32*)
    AC_MSG_NOTICE(win32)
    QTLIBS="-L$QTLIBDIR -lgdi32 -luser32 -lmingw32 -lqtmain -lQtGui4 -lQtCore4 -mthreads -Wl,-enable-stdcall-fixup -Wl,-enable-auto-import -Wl,-enable-runtime-pseudo-reloc -Wl,-s -Wl,-s -Wl,-subsystem,windows"
    QTINC="-I$QTINCLUDEDIR -I$QTINCLUDEDIR/QtCore -I$QTINCLUDEDIR/QtGui -DUNICODE -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_NO_DEBUG -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -DQT_NEEDS_QMAIN -frtti -fexceptions"
    QTBIN="$QTDIR/bin"
    ;;
  *)
    AC_MSG_NOTICE(generic UNIX)
    AC_PATH_XTRA
    QTINC="-I$QTINCLUDEDIR -I$QTINCLUDEDIR/QtGui -I$QTINCLUDEDIR/QtCore $X_CFLAGS -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED"
    QTLIBS="-Wl,-rpath,QTLIBDIR -L$QTLIBDIR -lQtGui -lQtCore -lpthread"
    QTBIN="$QTDIR/bin"
    ;;
esac

LIBS="$LIBS $QTLIBS"
INCLUDES="$INCLUDES $QTINC"
PATH="$PATH:$QTBIN"
CXXFLAGS="$CXXFLAGS $QTINC"

# Now we check whether we can actually build a Qt app.
cat > myqt.h << EOF
#include <QObject>
class Test : public QObject
{
Q_OBJECT
public:
  Test() {}
  ~Test() {}
public slots:
  void receive() {}
signals:
  void send();
};
EOF

cat > myqt.cpp << EOF
#include "myqt.h"
#include <QApplication>
int main( int argc, char **argv )
{
  QApplication app( argc, argv );
  Test t;
  QObject::connect( &t, SIGNAL(send()), &t, SLOT(receive()) );
}
EOF

AC_MSG_CHECKING(does moc work)
bnv_try_1="moc myqt.h -o moc_myqt.cpp"
AC_TRY_EVAL(bnv_try_1)
if test x"$ac_status" != x0; then
   AC_MSG_ERROR(moc doesn't work)
fi
AC_MSG_RESULT(yes)
AC_MSG_CHECKING(can I compile moc_myqt.cpp)
bnv_try_2="$CXX -c $CXXFLAGS -o moc_myqt.o moc_myqt.cpp"
AC_TRY_EVAL(bnv_try_2)
if test x"$ac_status" != x0; then
   AC_MSG_ERROR(couldn't compile moc_myqt.cpp)
fi
AC_MSG_RESULT(yes)
AC_MSG_CHECKING(can I compile myqt.cpp)
bnv_try_3="$CXX $QTINC -c $CXXFLAGS -o myqt.o myqt.cpp"
AC_TRY_EVAL(bnv_try_3)
if test x"$ac_status" != x0; then
   AC_MSG_ERROR(couldn't compile myqt.cpp)
fi
AC_MSG_RESULT(yes)
AC_MSG_CHECKING(can I link against QT)
nv_try_4="$CXX $LIBS -o myqt myqt.o moc_myqt.o"
AC_TRY_EVAL(bnv_try_4)
if test x"$ac_status" != x0; then
   AC_MSG_ERROR(couldn't link)
fi
AC_MSG_RESULT(yes)

AC_MSG_CHECKING(for mkoctfile)
AC_TRY_EVAL(mkoctfile)
if test x"$ac_status" != x0; then
   AC_MSG_ERROR(mkoctfile is not in the path)
fi
AC_MSG_RESULT(yes)
rm -f moc_myqt.cpp myqt.h myqt.cpp myqt.o myqt moc_myqt.o

AC_CONFIG_FILES(Makefile src/Makefile)
AC_OUTPUT

AC_MSG_RESULT([

$PACKAGE_STRING

Configuration summary:

platform .................. $host
installation prefix ....... $prefix

includes .................. $INCLUDES
libraries ................. $LIBS
preprocessor flags ........ $CXXFLAGS
compiler flags ............ $CXXFLAGS

])