dnl Process this file with autoconf to produce a configure script.
dnl
dnl The basis for this file was generated by autoscan(1) [pere 1998-03-19]
dnl
AC_INIT(Simulator/Aircraft/aircraft.c)

dnl Initialize the automake stuff
AM_INIT_AUTOMAKE(FlightGear, 0.52)

dnl Checks for programs.

AC_PROG_MAKE_SET
AC_PROG_CC
AC_PROG_CXX
AC_PROG_INSTALL
AC_PROG_LN_S
dnl Initialize libtool
AM_PROG_LIBTOOL

dnl Initialize maintainer mode
AM_MAINTAINER_MODE

dnl This is needed for AC_TRY_COMPILE later
AC_ISC_POSIX

dnl Check to see if this `configure' is being run in the `Cygwin32' environment
dnl AM_CYGWIN32

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

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 Check for external variables daylight and timezone.
AC_EXT_DAYLIGHT
AM_CONDITIONAL(HAVE_DAYLIGHT, test "$have_daylight" = yes )

AC_EXT_TIMEZONE
AM_CONDITIONAL(HAVE_TIMEZONE, test "$have_timezone" = yes )

dnl Check for Linux style audio support
AM_CONDITIONAL(ENABLE_AUDIO_SUPPORT, \
	test -r /usr/include/soundcard.h \
		-o -r /usr/include/linux/soundcard.h \
		-o -r /usr/include/machine/soundcard.h \
		-o "x$ac_cv_header_windows_h" = "xyes" )

AM_CONDITIONAL(ENABLE_WIN32_AUDIO, test "x$ac_cv_header_windows_h" = "xyes")

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

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 Check for X11 (fancy)
AC_PATH_XTRA

dnl Checks for libraries.

AC_CHECK_LIB(m, cos)
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 Solaris OpenGL pain
# AC_CHECK_LIB(eprintf, __eprintf)

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$ac_cv_lib_MesaGL_glNewList" = "xyes" ; then
    AC_CHECK_HEADER(GL/xmesa.h)
    AM_CONDITIONAL(ENABLE_XMESA_FX, test "x$ac_cv_header_GL_xmesa_h" = "xyes")
else
    dnl force a failed check
    AM_CONDITIONAL(ENABLE_XMESA_FX, test "no" = "yes")
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

AC_CHECK_LIB(glut, glutGetModifiers)
	
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.
if test "x$ac_cv_header_windows_h" = "xyes" ; then
    echo Win32 specific hacks...
    AC_DEFINE(WIN32)

    dnl Note, the double square brackets are required becuase single brackets
    dnl seem to get stripped out
    if [[ -f `pwd`/Win32/glut.dll ]]; then
        echo "    found glut.dll, adding -lglut"
        LIBS="$LIBS -lglut"
    else
        echo "    Cannot find glut.dll"
        exit 1
    fi
    if [[ -f `pwd`/Win32/glu.dll ]]; then
        echo "    found glu.dll"
    else
        echo "    Can't find glu.dll, assuming it's someplace"
    fi
    echo "    adding -lglu"
    LIBS="$LIBS -lglu"
    if [[ -f `pwd`/Win32/opengl.dll ]]; then
        echo "    found opengl.dll"
    else
        echo "    Can't find opengl.dll, assuming it's somplace"
    fi
    echo "    adding -lopengl"
    LIBS="$LIBS -lopengl"
    echo "    adding -luser32 -lgdi32"
    LIBS="$LIBS -luser32 -lgdi32"
    ac_cv_lib_glut_glutGetModifiers="yes"
fi

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

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 mktime strstr rand random \
	setitimer getitimer signal GetLocalTime rint )

if test "x$ac_cv_lib_glut_glutGetModifiers" = "xno"; then
    echo 
    echo "Unable to find the necessary GL libraries."
    exit 1
fi

AM_CONFIG_HEADER(Include/config.h)

AC_OUTPUT( \
	Makefile \
	Include/Makefile \
	Lib/Makefile \
	Lib/Audio/Makefile \
	Lib/Audio/src/Makefile \
	Lib/Audio/example/Makefile \
	Lib/Bucket/Makefile \
	Lib/Debug/Makefile \
	Lib/DEM/Makefile \
	Lib/Math/Makefile \
	Lib/PUI/Makefile \
	Lib/XGL/Makefile \
	Lib/zlib/Makefile \
	Simulator/Makefile \
	Simulator/Aircraft/Makefile \
	Simulator/Astro/Makefile \
	Simulator/Autopilot/Makefile \
	Simulator/Cockpit/Makefile \
	Simulator/Controls/Makefile \
	Simulator/Flight/LaRCsim/Makefile \
	Simulator/Flight/Slew/Makefile \
	Simulator/Flight/Makefile \
	Simulator/GUI/Makefile \
	Simulator/Joystick/Makefile \
	Simulator/Main/Makefile \
	Simulator/Main/runfg \
	Simulator/Main/runfg.bat \
	Simulator/Makefile \
	Simulator/Scenery/Makefile \
	Simulator/Time/Makefile \
	Simulator/Weather/Makefile \
	Tools/Makefile \
	Tools/Areas/Makefile \
	Tools/AssemTris/Makefile \
	Tools/Dem2node/Makefile \
	Tools/DemInfo/Makefile \
	Tools/DemRaw2ascii/Makefile \
	Tools/FixNode/Makefile \
	Tools/FixObj/Makefile \
	Tools/SplitTris/Makefile \
	Tools/Stripe_w/Makefile \
	Tools/Tri2obj/Makefile \
	Tools/Triangle/Makefile \
	Tests/Makefile \
)