dnl Process this file with autoconf to produce a configure script.
AC_INIT(lcd4linux.c)
AM_INIT_AUTOMAKE(lcd4linux, 0.98)

dnl Checks for programs.
AC_PROG_AWK
AC_PROG_CC
AC_PROG_INSTALL
AC_PROG_LN_S

dnl Checks for libraries.
AC_CHECK_LIB(m, log)

dnl Checks for X11
AC_PATH_XTRA

dnl drivers
AC_ARG_WITH(
  drivers, 
  [  --with-drivers=<list>   compile driver for displays in <list>,]
  [                        drivers may be separated with commas,]	
  [                        'all' (default) compiles all available drivers.]	
  [                        possible drivers are:]	
  [                        BeckmannEgle, CrystalFontz, HD44780,]
  [                        MatrixOrbital, PalmPilot, PNG, PPM, X11, Text],
  drivers=$withval, 
  drivers=all
)
if test "$drivers" = "all"; then
drivers=[BeckmannEgle,CrystalFontz,HD44780,MatrixOrbital,PalmPilot,PNG,PPM,X11,Text]
fi

RASTER=0
drivers=`echo $drivers|sed 's/,/ /g'`

for driver in $drivers; do
   case "$driver" in
      BeckmannEgle)
         DRIVERS="$DRIVERS BeckmannEgle.o"
         AC_DEFINE(WITH_BECKMANNEGLE)
         ;;
      CrystalFontz)
         DRIVERS="$DRIVERS Crystalfontz.o"
         AC_DEFINE(WITH_CRYSTALFONTZ)
         ;;
      HD44780)
         DRIVERS="$DRIVERS HD44780.o"
         AC_DEFINE(WITH_HD44780)
         ;;
      MatrixOrbital)
         DRIVERS="$DRIVERS MatrixOrbital.o"
         AC_DEFINE(WITH_MATRIXORBITAL)
         ;;
      PalmPilot)
         DRIVERS="$DRIVERS PalmPilot.o"
         AC_DEFINE(WITH_PALMPILOT)
         ;;
      PNG)
         RASTER=$(($RASTER + 1))
         AC_DEFINE(WITH_PNG)
	 DRVLIBS="$DRVLIBS -lgd -lpng -lz"
         ;;
      PPM)
         RASTER=$(($RASTER + 1))
         AC_DEFINE(WITH_PPM)
         ;;
      SIN)
         DRIVERS="$DRIVERS SIN.o"
         AC_DEFINE(WITH_SIN)
         ;;
      Skeleton)
         DRIVERS="$DRIVERS Skeleton.o"
         AC_DEFINE(WITH_Skeleton)
         ;;
      X11)
         DRIVERS="$DRIVERS XWindow.o"
	 DRVLIBS="$DRVLIBS -lX11"
         AC_DEFINE(WITH_X11)
         ;;
      Text)
         DRIVERS="$DRIVERS Text.o"
	 DRVLIBS="$DRVLIBS -lncurses"
         AC_DEFINE(WITH_Text)
         ;;
      *) 	
         AC_MSG_ERROR([Unknown driver '$driver'])
         ;;
   esac
done

dnl delete drivers, mainly if all wa chosen above

AC_ARG_WITH(
  notdrivers, 
  [  --with-notdrivers=<list> do not compile driver for displays in <list>,]
  [                        drivers may be separated with commas,]	
  [                        mainly useful if above all drivers were selected.]	
  [                        possible drivers are:]	
  [                        BeckmannEgle, CrystalFontz, HD44780,]
  [                        MatrixOrbital, PalmPilot, PNG, PPM, X11, Text],
  notdrivers=$withval, 
  notdrivers="no"
)

AC_DEFUN(AC_UNDEFINE,
mv confdefs.h confdefs.h~
grep -v $1 < confdefs.h~ > confdefs.h
)

notdrivers=`echo $notdrivers|sed 's/,/ /g'`
for driver in $notdrivers; do
   case "$driver" in
      BeckmannEgle)
         DRIVERS=${DRIVERS/ BeckmannEgle.o/}
         AC_UNDEFINE(WITH_BECKMANNEGLE)
         ;;
      CrystalFontz)
         DRIVERS=${DRIVERS/ Crystalfontz.o/}
         AC_UNDEFINE(WITH_CRYSTALFONTZ)
         ;;
      HD44780)
         DRIVERS=${DRIVERS/ HD44780.o/}
         AC_UNDEFINE(WITH_HD44780)
         ;;
      MatrixOrbital)
         DRIVERS=${DRIVERS/ MatrixOrbital/}
         AC_UNDEFINE(WITH_MATRIXORBITAL)
         ;;
      PalmPilot)
         DRIVERS=${DRIVERS/ PalmPilot/}
         AC_UNDEFINE(WITH_PALMPILOT)
         ;;
      PNG)
         RASTER=$(($RASTER - 1))
         AC_UNDEFINE(WITH_PNG)
	 DRVLIBS=${DRVLIBS/ -lgd -lpng -lz/}
         ;;
      PPM)
         RASTER=$(($RASTER - 1))
         AC_UNDEFINE(WITH_PPM)
         ;;
      SIN)
         DRIVERS=${DRIVERS/ SIN.o/}
         AC_UNDEFINE(WITH_SIN)
         ;;
      Skeleton)
         DRIVERS=${DRIVERS/ Skeleton.o/}
         AC_UNDEFINE(WITH_Skeleton)
         ;;
      X11)
         DRIVERS=${DRIVERS/ XWindow.o/}
	 DRVLIBS=${DRVLIBS/ -lX11/}
         AC_UNDEFINE(WITH_X11)
         ;;
      Text)
         DRIVERS=${DRIVERS/ Text.o/}
	 DRVLIBS=${DRVLIBS/ -lncurses/}
         AC_UNDEFINE(WITH_Text)
         ;;
      no)
         ;;
      *) 	
         AC_MSG_ERROR([Unknown driver '$driver'])
         ;;
   esac
done

test $RASTER -gt 0 && RASTERDRIVER="Raster.o"

DRIVERS="$DRIVERS $RASTERDRIVER"

AC_SUBST(DRIVERS)
AC_SUBST(DRVLIBS)

dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_DIRENT
AC_HEADER_SYS_WAIT
AC_CHECK_HEADERS(fcntl.h limits.h strings.h sys/ioctl.h sys/time.h syslog.h unistd.h)
AC_CHECK_HEADERS(sys/io.h asm/io.h)
AC_CHECK_HEADERS(gd/gd.h gd.h)
AC_CHECK_HEADERS(net/if_ppp.h)

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

dnl Checks for library functions.
AC_PROG_GCC_TRADITIONAL
AC_FUNC_MEMCMP
AC_TYPE_SIGNAL
AC_CHECK_FUNCS(gettimeofday select socket strdup strerror strstr strtol uname)

AC_OUTPUT(Makefile)