dnl Process this file with aclocal ; automake -a ; autoconf to produce a 
dnl working configure script.
dnl
dnl $Id$

AC_INIT(simgear/bucket/newbucket.cxx)

dnl Initialize the automake stuff
AM_INIT_AUTOMAKE(SimGear, 0.0.15)

dnl Specify KAI C++ compiler and flags.
dnl Borrowed with slight modification from blitz distribution.
AC_ARG_WITH(cxx,
  [  --with-cxx=COMPILER[:name-flags] set options for COMPILER (KCC)],
  [case "$withval" in
    KCC*)    # KAI C++ http://www.kai.com/
      echo "Configuring for KAI C++"
      AC_SG_SET_COMPILER($withval,"KCC","--restrict --strict_warnings")
      CXX_OPTIMIZE_FLAGS=="+K3 -O3"
      CXX_DEBUG_FLAGS="-g +K0"
    ;;
  esac
])

echo CXX = $CXX
echo CC = $CC

dnl Checks for programs.
AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CPP
AC_PROG_CXX
AC_PROG_RANLIB
AC_PROG_INSTALL
AC_PROG_LN_S

AR="ar"
OS=`uname -s`
if test "$OS" = "IRIX" -o "$OS" = "IRIX64"; then
    if test "$CXX" = "CC"; then
        AR="CC -ar"
        AC_SUBST(AR)
    fi
fi

if echo $includedir | egrep "simgear$" > /dev/null; then
    echo "includedir is" $includedir "libdir is" $libdir
else
    includedir="${includedir}/simgear"
    echo "includedir changed to" $includedir "libdir is" $libdir
fi


# set logging default value
# with_logging=yes
AC_ARG_WITH(logging, [  --with-logging          Include logging output (default)])
if test "x$with_logging" = "xno" ; then
    AC_DEFINE(FG_NDEBUG)
fi

dnl specify if we are building with "checker"
AC_ARG_WITH(efence, [  --with-efence           Specify if we are building with "electric-fence"])

if test "x$with_efence" = "xyes" ; then
    echo "Building with efence"
    LIBS="$LIBS -lefence"
fi

dnl Check for MS Windows environment
AC_CHECK_HEADER(windows.h)

dnl extra library and include directories
EXTRA_DIRS="/usr/local /usr/local/plib /usr/X11R6"

if test -d /opt/X11R6 ; then
     EXTRA_DIRS="$EXTRA_DIRS /opt/X11R6"
fi

if test "x$ac_cv_header_windows_h" = "xyes" ; then
    EXTRA_DIRS="${EXTRA_DIRS} `pwd`/Win32"
# elif test `uname -s` = "SunOS" ; then
#   EXTRA_DIRS="${EXTRA_DIRS} `pwd`/SunOS"
fi
wi_EXTRA_DIRS(no, ${EXTRA_DIRS})

dnl Using AM_CONDITIONAL is a step out of the protected little 
dnl automake fold so it is potentially dangerous.  But, we are
dnl beginning to run into cases where the standard checks are not
dnl enough.  AM_CONDITIONALS are then referenced to conditionally
dnl build a Makefile.in from a Makefile.am which lets us define custom
dnl includes, compile alternative source files, etc.

dnl Enable serial support on Unix type systems
AM_CONDITIONAL(ENABLE_UNIX_SERIAL, true)

dnl Check for X11 (fancy)
AC_PATH_XTRA

dnl Checks for libraries.

null_LIBS="$LIBS"

AC_CHECK_LIB(m, cos)

base_LIBS="$LIBS"

dnl Thread related checks
AC_CHECK_LIB(pthread, pthread_exit)
AC_CHECK_HEADER(pthread.h)
if test "x$ac_cv_lib_pthread_pthread_exit" = "xyes" -a "x$ac_cv_header_pthread_h" = "xyes"; then
    CXXFLAGS="$CXXFLAGS -D_REENTRANT"
    CFLAGS="$CFLAGS -D_REENTRANT"
fi
AM_CONDITIONAL(HAVE_THREADS, test "x$ac_cv_lib_pthread_pthread_exit" = "xyes" -a "x$ac_cv_header_pthread_h" = "xyes")

AC_CHECK_LIB(socket, socket)
AC_CHECK_LIB(X11, XCreateWindow)
AC_CHECK_LIB(Xext, XShmCreateImage)
AC_CHECK_LIB(Xi, XGetExtensionVersion)
AC_CHECK_LIB(ICE, IceOpenConnection)
AC_CHECK_LIB(SM, SmcOpenConnection)
AC_CHECK_LIB(Xt, XtMalloc)
AC_CHECK_LIB(Xmu, XmuLookupStandardColormap)

dnl check for OpenGL related libraries

if test "x$ac_cv_header_windows_h" != "xyes" ; then
    dnl Reasonable stuff for non-windoze variants ... :-)

    AC_CHECK_LIB(GLcore, glNewList)
    if test "x$ac_cv_lib_GLcore_glNewList" = "xno" ; then
	dnl if no GLcore, check for GL
	AC_CHECK_LIB(GL, glNewList)
	if test "x$ac_cv_lib_GL_glNewList" = "xno" ; then
	    dnl if no GL, check for MesaGL
	    AC_CHECK_LIB(MesaGL, glNewList)
	fi
    else
	dnl if GLcore found, then also check for GL
	AC_CHECK_LIB(GL, glXCreateContext)
    fi

    dnl if using mesa, check for xmesa.h
    if test "x$ac_cv_lib_MesaGL_glNewList" = "xyes" ; then
	AC_CHECK_HEADER(GL/xmesa.h)
	if test "x$ac_cv_header_GL_xmesa_h" = "xyes"; then
	    AC_DEFINE( XMESA )
            AC_DEFINE( FX )
        fi
    fi

    AC_CHECK_LIB(GLU, gluLookAt)
    if test "x$ac_cv_lib_GLU_gluLookAt" = "xno" ; then
	dnl if no GLU, check for MesaGLU
	AC_CHECK_LIB(MesaGLU, gluLookAt)
    fi

    dnl check for glut
    AC_CHECK_LIB(glut, glutGetModifiers)

    dnl test for glutGameModeString, but avoid adding glut a second time into
    dnl the list of libraries
    save_LIBS="$LIBS"
    AC_CHECK_LIB(glut, glutGameModeString)
    LIBS="$save_LIBS"
else
    dnl Win32 is a little wierd because it has to try to handle the various
    dnl winbloze-isms.  We'll just do this manually for now.

    echo Win32 specific hacks...
    AC_DEFINE(WIN32)

    dnl force a failed check since we will be building under windoze
    AM_CONDITIONAL(ENABLE_XMESA_FX, test "no" = "yes")

    dnl just define these to true and hope for the best
    ac_cv_lib_glut_glutGetModifiers="yes"
    ac_cv_lib_glut_glutGameModeString="yes"

    if test "x$with_sgi_opengl" = "xyes" ; then
        echo "Building with glut.dll, glu.dll, and opengl.dll"
	WIN32_GLUT=glut
	WIN32_GLU=glu
	WIN32_OPENGL=opengl
    else 
	echo "Building with glut32.dll, glu32.dll, and opengl32.dll"
	WIN32_GLUT=glut32
	WIN32_GLU=glu32
	WIN32_OPENGL=opengl32
    fi

    LIBS="$LIBS -l${WIN32_GLUT} -l${WIN32_GLU} -l${WIN32_OPENGL}"
    LIBS="$LIBS -luser32 -lgdi32"
    echo "Will link apps with $LIBS"
fi

if test "x$ac_cv_lib_glut_glutGetModifiers" = "xno"; then
    echo 
    echo "Unable to find the necessary OpenGL or GLUT libraries."
    echo "See config.log for automated test details and results ..."
    exit 1
fi

if test "x$ac_cv_lib_glut_glutGameModeString" = "xno"; then
    echo
    echo "Your version of glut doesn't support game mode."
    echo "You need to fetch and install the latest version of glut from:"
    echo
    echo "    http://reality.sgi.com/opengl/glut3/glut3.html"
    exit 1
fi

opengl_LIBS="$LIBS"
LIBS="$base_LIBS"

AC_SUBST(base_LIBS)
AC_SUBST(opengl_LIBS)

AM_CONDITIONAL(HAVE_XWINDOWS, test "x$ac_cv_lib_X11_XCreateWindow" = "xyes" )

dnl Check for "plib" without which we cannot go on
AC_CHECK_HEADER(plib/pu.h)
if test "x$ac_cv_header_plib_pu_h" != "xyes"; then
    echo
    echo "You *must* have the plib library installed on your system to build"
    echo "the FGFS simulator!"
    echo
    echo "Please see README.plib for more details."
    echo
    echo "configure aborted."
    exit
fi

# dnl Check for system installed gdbm
# AC_CHECK_HEADER(gdbm.h)
# if test "x$ac_cv_header_gdbm_h" = "xyes"; then
#     AC_DEFINE( HAVE_GDBM )
# else
#     echo "no gdbm found, configuring and building."
# fi
# AM_CONDITIONAL(HAVE_GDBM, test "x$ac_cv_header_gdbm_h" = "xyes" )

dnl Check for system installed metakit
AC_CHECK_HEADER(mk4.h)
if test "x$ac_cv_header_mk4_h" != "xyes"; then
    echo "no metakit found, configuring and building."
    # Run configure in the metakit subdir
    AC_CONFIG_SUBDIRS( simgear/metakit/unix )
fi
AM_CONDITIONAL(HAVE_METAKIT, test "x$ac_cv_header_mk4_h" = "xyes" )


dnl Specify if we want logging (testing build) or not (release build)

dnl Check for system installed zlib
AC_CHECK_HEADER(zlib.h)
if test "x$ac_cv_header_zlib_h" = "xyes"; then
    AC_DEFINE( HAVE_ZLIB )
else
    echo "no zlib found, building."
fi
AM_CONDITIONAL(HAVE_ZLIB, test "x$ac_cv_header_zlib_h" = "xyes" )

dnl Checks for header files.
AC_HEADER_STDC
AC_CHECK_HEADERS( \
	fcntl.h getopt.h malloc.h memory.h stdint.h stdlib.h sys/param.h \
	sys/stat.h sys/time.h sys/timeb.h unistd.h windows.h winbase.h values.h )

if test "x$ac_cv_header_stdint_h" = "xyes"; then
    AC_DEFINE( HAVE_STDINT_H )
fi

dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_TYPE_SIZE_T
AC_HEADER_TIME
AC_STRUCT_TM

dnl Checks for library functions.
AC_TYPE_SIGNAL
AC_FUNC_VPRINTF
AC_CHECK_FUNCS( ftime gettimeofday timegm memcpy bcopy mktime strstr rand \
	random setitimer getitimer signal GetLocalTime rint getrusage )

AM_CONFIG_HEADER(simgear/simgear_config.h)

AC_OUTPUT( \
	Makefile \
	SimGear.spec \
	simgear/Makefile \
	simgear/version.h \
	simgear/bucket/Makefile \
	simgear/debug/Makefile \
	simgear/ephemeris/Makefile \
	simgear/io/Makefile \
	simgear/magvar/Makefile \
	simgear/math/Makefile \
	simgear/metar/Makefile \
	simgear/misc/Makefile \
	simgear/route/Makefile \
	simgear/screen/Makefile \
	simgear/serial/Makefile \
	simgear/sky/Makefile \
	simgear/threads/Makefile \
	simgear/timing/Makefile \
	simgear/xgl/Makefile \
	simgear/xml/Makefile \
	simgear/zlib/Makefile \
)

AC_OUTPUT_COMMANDS([
#	if test "x$ac_cv_header_windows_h" = "xyes" ; then
#		cp simgear/gdbm/autoconf.h.cygwin32 simgear/gdbm/autoconf.h
#	fi
])

echo ""
echo "Configure Summary"
echo "================="

echo "Prefix: $prefix"

if test "x$with_logging" != "x"; then
    echo "Debug messages: $with_logging"
else
    echo "Debug messages: yes"
fi

if test "x$with_efence" != "x"; then
    echo "Electric fence: $with_efence"
else
    echo "Electric fence: no"
fi

# if test "x$ac_cv_header_gdbm_h" != "xyes"; then
#    echo "Building gdbm"
# fi

if test "x$ac_cv_header_mk4_h" != "xyes"; then
   echo "Building metakit"
fi

if test "x$ac_cv_header_zlib_h" != "xyes"; then
   echo "Building zlib"
fi

if test "x$ac_cv_lib_pthread_pthread_exit" = "xyes" -a "x$ac_cv_header_pthread_h" = "xyes"; then
   echo "Threads: pthread lib found."
else
   echo "Threads: no threads (pthread lib not found.)"
fi