#!/bin/sh

# This is a UNIX shell script that generates a custom "Makefile" file and
# a "config.h" file.
#
# usage: configure [[flags] system]
#
# flags: --with-x[=no]		enable/disable support for X-windows interface
#	 --without-x		disable support for X-windows interface
#	 --with-gcc[=no]	enable/disable use of GCC
#	 --without-gcc		disable use of GCC
#	 --x-includes=DIR	add DIR to path for X-windows include files
#	 --x-libraries=DIR	add DIR to path for X-windows libraries
#        --libs=STRING		define the non-X11 part of the LIBS= line
#	 --bindir=DIR		where to install the executables
#	 --datadir=DIR		where to install the supporting data files
#	 --ioctl=VARIETY	type of tty ioctl to use: termios, termio, sgtty
#	 --verbose		explain each decision
#
# system: *one* of the following...
#	 linux			UNIX clone for IBM clones
#	 sunos			Sun's Ancient SunOS variant of BSD
#	 solaris		Sun's OLDER Solaris systems
#	 solaris2		Sun's NEWER Solaris 2 systems
#	 aix			IBM's variant of POSIX
#	 osf-1			DEC's variant of POSIX
#	 ultrix			DEC's variant of BSD
#	 hp-ux			HP's variant of POSIX
#	 qnx			QNX's POSIXish real-time operating system
#	 irix			SGI's variant of POSIX
#	 xenix			ancient SCO Xenix-386 systems
#	 sco			SCO UNIX or Open Desktop systems
#	 bsd			typical BSD implementations
#	 freebsd		FreeBSD is a specific BSD implementation
#	 openbsd		OpenBSD is a specific BSD implementation
#	 posix			generic POSIX implementations
#	 cygwin			GNU utilities under Windows95/98/NT
#        (anything else)	generic UNIX, including SysV
# If no system is specified, this script will attempt to obtain the system
# type by running the "uname" command.  If it can't recognize the system name
# returned by "uname", then it uses generic UNIX settings.  The script also
# inspects the files on your system to refine those settings, so it'll still
# work okay, usually.

# Set some defaults
XINCPATH="/usr/include /usr/include/X11 /usr/X11/include /usr/local/X11/include /usr/openwin/include /usr/X11R6/include"
XLIBPATH="/lib /usr/lib /usr/X11/lib /usr/local/X11/lib /usr/openwin/lib /usr/X11R6/lib /usr/ucblib /usr/ccs/lib /usr/local/lib "`echo "$LD_LIBRARY_PATH" | tr ':' ' '`
GNUPATH=`echo "$PATH" | tr ':' ' '`
BINDIR=/usr/local/bin
LIBDIR=/usr/local/lib/elvis
SYS=""
DEFAULT_CC="cc -O"
IOCTL=""
WHY=""

# Initialize some variables.  These aren't merely defaults; don't change them!
args=""
XLIBS=""
NLIBS=""

# Ultrix has a broken /bin/sh; it doesn't support shell functions.  Try to be
# clever about running bash instead of /bin/sh there.
if [ "$SYS" = ultrix ]
then
	case "$0" in
	  *configure)
		(echo set - "$@"; cat configure) | bash
		exit 0
		;;
	esac
fi

# This function echoes its arguments, but only if the --verbose flag is given
why()
{
	if [ "$WHY" ]
	then
		echo "$@"
	fi
}

# This function is used to look for a file in a path. $1 is the name of the
# file, and the remaining args are the path.  It write the absolute file file
# to stdout if successful
searchpath()
{
	file=$1
	shift
	for i
	do
		if [ -f $i/$file ]
		then
			echo $i/$file
			return
		fi
	done
}

# This function outputs a usage message, and then exits
usage()
{
	echo "usage: configure [[flags] system]"
	echo "flags: --with-x[=no]      enable/disable support for X-windows interface"
	echo "       --without-x        disable support for X-windows interface"
	echo "       --with-gcc[=no]    enable/disable use of GCC"
	echo "       --without-gcc      disable use of GCC"
	echo "       --x-includes=DIR   add DIR to path for X-windows include files"
	echo "       --x-libraries=DIR  add DIR to path for X-windows libraries"
	echo "       --bindir=DIR       where to install the executables"
	echo "       --datadir=DIR      where to install the supporting data files"
	echo "       --libs=STRING      non-X11 part of the LIBS= string in Makefile"
	echo "       --ioctl=VARIETY    type of tty ioctl to use: termios, termio, or sgtty"
	echo "       --verbose          explain any decisions made during configuration"
	echo "system: linux, sunos, solaris, solaris2, freebsd, openbsd, bsd, posix,"
	echo "        aix, osf-1, hp-ux, ultrix, qnx, irix, cygwin, xenix,"
	echo "        sco (meaning SCO Unix or OpenDesktop)"
	if [ "$*" ]
	then
		echo "$*"
	fi
	exit
}

# Check the arguments
for i
do
	case "$i" in
	  --with-x=no|--without-x)
		GUI_X11=undef
		args="$args --with-x=no"
		;;
	  --with-x*)
		GUI_X11=define
		args="$args --with-x"
		;;
	  --with-gcc=no|--without-gcc)
		gnu=n
		forcegcc=n
		args="$args --with-gcc=no"
		;;
	  --with-gcc*)
		gnu=y
		forcegcc=y
		args="$args --with-gcc"
		;;
	  --x-includes=*)
		XINCPATH=`echo "$i"|sed 's/^--x-includes=//'`" $XINCPATH"
		args="$args $i"
		;;
	  --x-libraries=*)
		XLIBPATH=`echo "$i"|sed 's/^--x-libraries=//'`" $XLIBPATH"
		args="$args $i"
		;;
	  --bindir=*)
		BINDIR=`echo "$i"|sed 's/^--bindir=//'`
		args="$args $i"
		;;
	  --datadir=*)
		LIBDIR=`echo "$i"|sed 's/^--datadir=//'`
		args="$args $i"
		;;
	  --libs=*)
		LIBS=`echo "$i"|sed 's/^--libs=//'`
		# added to args later
		;;
	  --ioctl=termios|--ioctl=termio|--ioctl=sgtty)
		IOCTL=`echo "$i"|sed 's/^--ioctl=//'`
		args="$args $i"
		;;
	  --ioctl=*)
		usage "bad --ioctl value; must be termios, termio, or sgtty"
		;;
	  --verbose)
		WHY=y
		;;
	  --help|-\?)
		usage
		;;
	  --version)
		sed -n 's/.*VERSION.*"\(.*\)\"/configure (elvis) \1/p' version.h
		sed -n 's/.*COPY1.*"\(.*\)\"/\1/p' version.h
		exit 0
		;;
	  --*)
		# Ignore other --symbol flags
		;;
	  -*)
		usage invalid option $i
		;;
	  *)
		SYS="$i"
		;;
	esac
done

# If no system specified, then guess by examining output of uname
if [ "$SYS" = "" ]
then
	why "No system type was specified, so I'm running uname(1) to guess it..."
	SYS=`uname | tr '[A-Z]' '[a-z]'`
	why "   Apparently this is '$SYS'"

	case "$SYS" in
	  sunos)
		# Solaris 2 masquerades as SunOS.  Check for that, by examining
		# the release number.
		why "   I know '$SYS'"
		why "   Solaris claims to be SunOS, but it requires a different configuration."
		why "   I'm checking the release number to distinguish between them..."
		case `uname -r` in
		  [5-9]*)	SYS=solaris2	;;
		esac
		why "   This is really '$SYS'"
		;;

	  linux|solaris|solaris2|aix|osf-1|ultrix|hp-ux|qnx|irix*|xenix|sco|bsd|freebsd|openbsd|posix|cygwin*)
		why "   I know '$SYS' -- This should be easy!"
		;;

	  *)
		# SCO likes to change the OS name to match the system name.
		# Inspect the files to guess whether that's the case here.
		if [ -f /etc/hwconfig ]
		then
			if [ -f /unix ]
			then
				sys2=sco
			else
				sys2=xenix
			fi
			why "   I don't know '$SYS' but I know '$sys2' and this looks like '$sys2' to me"
			SYS=$sys2
		else
			why "   I don't know '$SYS' so I'll treat this like generic Unix"
		fi
	esac
fi

# Try to locate some files
why "Looking for some compiler files..."
inet=`searchpath netinet/in.h $XINCPATH`
case "$inet" in
	"") why "   Internet headers not found - maybe need '--x-includes=...' argument?" ;;
	*) why "   Internet headers found" ;;
esac
case "$GUI_X11" in
  undef)
	why "   Skipping X11 tests since you specified --with-x=no"
	;;

  *)
	xinc=`searchpath X11/Xresource.h $XINCPATH`
	case "$xinc" in
		"") why "   X11 headers not found - maybe need '--x-includes=...' argument?" ;;
		*) why "   X11 headers found" ;;
	esac
	xlib=`searchpath libX11.a $XLIBPATH`
	if [ "$xlib" = "" ]
	then
		xlib=`searchpath libX11.so $XLIBPATH`
	fi
	case "$xlib" in
		"") why "   X11 libraries not found - maybe need '--x-libraries=...' argument?" ;;
		*) why "   X11 libraries found" ;;
	esac
	;;
esac
case "$CC" in
  "")	CC="$DEFAULT_CC"
	case "$gnu" in
	  y|"")
		gnu=`searchpath gcc $GNUPATH`
		case "$inet" in
			"") why "   GCC not found" ;;
			*) why "   GCC found" ;;
		esac
		;;
	  *)
		why "   GCC not searched for because of --gcc=$gcc argument"
		;;
	esac
	;;
esac
case "$gnu" in
 y|n)	gnu="" ;;
esac

# If X-windows is unspecified, and the X files are present, then assume with-x
if [ "$GUI_X11" = "" -a "$xinc" ]
then
	why "Assuming --with-x because X11 headers were found"
	GUI_X11=define
	args="$args --with-x"
elif [ "$GUI_X11" = "" ]
then
	why "Assuming --with-x=no because X11 headers were not found"
	GUI_X11=undef
	args="$args --with-x=no"
fi

# if network protocols are unspecified, and the network header files are
# present, then assume they should be used.
if [ "$PROTOCOL_HTTP" = "" -a "$inet" ]
then
	why "Assuming HTTP should be supported because Internet headers were found"
	PROTOCOL_HTTP=define
elif [ "$PROTOCOL_HTTP" = "" ]
then
	why "Assuming HTTP should not be supported because Internet headers were not found"
	PROTOCOL_HTTP=undef
fi
if [ "$PROTOCOL_FTP" = "" -a "$inet" ]
then
	why "Assuming FTP should be supported because Internet headers were found"
	PROTOCOL_FTP=define
elif [ "$PROTOCOL_FTP" = "" ]
then
	why "Assuming FTP should not be supported because Internet headers were not found"
	PROTOCOL_FTP=undef
fi

################################################################################


# Check for some known system quirks
if [ -f /usr/include/sys/ptem.h ]
then
	why "This system has a <sys/ptem.h> file so I assume elvis needs it" 
	NEED_WINSIZE=define
else
	why "This system has no <sys/ptem.h> file so I assume elvis doesn't need it"
fi
if [ -f /usr/include/termcap.h ]
then
	why "This system has a <termcap.h> file so I assume elvis needs it" 
	NEED_SPEED_T=define
else
	why "This system has no <termcap.h> file so I assume elvis doesn't need it"
fi
if [ -f /usr/include/sys/wait.h ]
then
	why "This system has a <sys/wait.h> file so I assume elvis needs it" 
	NEED_WAIT_H=define
else
	why "This system has no <sys/wait.h> file so I assume elvis doesn't need it"
fi
#if [ -f /usr/include/sys/select.h ]
#then
#	why "This system has a <sys/select.h> file so I assume elvis needs it" 
#	NEED_SELECT_H=define
#else
#	why "This system has no <sys/select.h> file so I assume elvis doesn't need it"
#fi
if [ -f /usr/include/sys/ioctl.h ]
then
	why "This system has a <sys/ioctl.h> file so I assume elvis needs it" 
	NEED_IOCTL_H=define
else
	why "This system has no <sys/ioctl.h> file so I assume elvis doesn't need it"
fi
if [ -f /usr/include/netinet/in.h ]
then
	why "This system has a <netinet/in.h> file so I assume elvis needs it" 
	NEED_IN_H=define
else
	why "This system has no <netinet/in.h> file so I assume elvis doesn't need it"
fi
if [ -f /usr/include/sys/socket.h ]
then
	why "This system has a <sys/socket.h> file so I assume elvis needs it" 
	NEED_SOCKET_H=define
else
	why "This system has no <sys/socket.h> file so I assume elvis doesn't need it"
fi
if [ X"$xinc" != X ]
then
	if [ -f `dirname $xinc`/Xos.h ]
	then
		why "This system has a <X11/Xos.h> file so I assume elvis needs it" 
		NEED_XOS_H=define
	else
		why "This system has no <X11/Xos.h> file so I assume elvis doesn't need it"
	fi
fi
why "Does this system support setpgid()?"
if fgrep setpgid /usr/include/unistd.h >/dev/null 2>/dev/null
then
	why "   Assuming yes, because it is declared in <unistd.h>"
	NEED_SETPGID=undef
else
	why "   Assuming no, because it isn't declared in <unistd.h>"
	NEED_SETPGID=define
fi
if [ -s "$xinc" ]
then 
	why "Does this system support XrmCombineFileDatabase()?"
	if fgrep XrmCombineFileDatabase $xinc </dev/null >/dev/null
	then
		why "   Assuming yes, because it is declared in <X11/Xresource.h>"
		NEED_XRMCOMBINEFILEDATABASE=undef
	else
		why "   Assuming no, because it isn't declared in <X11/Xresource.h>"
		NEED_XRMCOMBINEFILEDATABASE=define
	fi
fi
if [ $PROTOCOL_HTTP = define -o $PROTOCOL_FTP = define ]
then
	why "Does this system support inet_aton()?"
	if [ "$SYS" = sunos -o "$SYS" = solaris -o "$SYS" = solaris2 ]
	then
		why "   Assuming no, because this is a Sun system."
		NEED_INET_ATON=define
	elif fgrep inet_aton /usr/include/arpa/inet.h </dev/null >/dev/null
	then
		why "   Assuming yes, because it is declared in <arpa/inet.h>"
		NEED_INET_ATON=undef
	else
		why "   Assuming no, because it isn't declared in <arpa/inet.h>"
		NEED_INET_ATON=define
	fi
fi
if [ $NEED_INET_ATON = undef ]
then
	why "Does this system require -lresolv to use inet_aton()?"
	if [ "`searchpath libresolv.a $XLIBPATH`" = "" ]
	then
		why "   Assuming no, because I couldn't find libresolv.a"
	else
		why "   Assuming yes, because I found libresolv.a"
		NLIBS="$NLIBS -lresolv"
	fi
fi
why "Does this system support memmove()?"
if fgrep memmove /usr/include/string*.h </dev/null >/dev/null
then
	why "   Assuming yes, because it is declared in <string.h> or <strings.h>"
	NEED_MEMMOVE=undef
else
	why "   Assuming no, because it isn't declared in <string.h> or <strings.h>"
	NEED_MEMMOVE=define
fi
case "$IOCTL" in
  termios)	USE=			;;
  termio)	USE=" -DUSE_TERMIO"	;;
  sgtty)	USE=" -DUSE_SGTTY"	;;
  *)
	why "Choosing a type of ioctl() calls, since no --ioctl=... argument was given"
	if [ -f /usr/include/termios.h ]
	then
		USE=
		args="$args --ioctl=termios"
		why "   Assuming --ioctl=termios because <termios.h> exists"
	else
		if [ -f /usr/include/termio.h ]
		then
			USE=" -DUSE_TERMIO"
			args="$args --ioctl=termio"
			why "   Assuming --ioctl=termio because <termio.h> exists"
		else
			USE=" -DUSE_SGTTY"
			args="$args --ioctl=sgtty"
			why "   Assuming --ioctl=sgtty because neither <termio.h> nor <termios.h> exists"
		fi
	fi
	;;
esac
case "$SYS" in
  *aix*)
	why "AIX always uses curses because the termcap database has no entry for xterm"
	TLIBS="-lcurses"
	;;
  *linux*)
	if [ ! -f /usr/lib/libtermcap.a -a ! -f /lib/libtermcap.a ]
	then
		if [ -f /usr/lib/libncurses.a -o -f /usr/lib/ncurses.a ]
		then
			why "For Linux, we're using ncurses because there is no termcap library"
			TLIBS="-lncurses"
		else
			why "For Linux, we're using curses because there is no termcap library"
			TLIBS="-lcurses"
		fi
	else
		why "For Linux, we're using termcap because I prefer it over curses/terminfo"
	fi
	if [ "$NEED_SELECT_H" = "define" ]
	then
		why "For Linux, elvis never needs <sys/select.h> so I'm ignoring it on your system"
		NEED_SELECT_H=undef
	fi
	;;
  *osf*)
	why "OSF is configured to use the bogus 'tinytcap.c' file instead of a real termcap"
	why "    or terminfo library.  I don't know why.   It also tries to use -ltermcap"
	why "    which doesn't make much sense here either.  You may want to change this."
	NEED_TGETENT=define
	#TLIBS="-lucb -lcurses"
	TLIBS="-ltermcap"
	;;
  *ultrix*)
	why "Ultrix needs -ldnet to support X11.  Also, it uses both -lcurses and -ltermcap"
	why "   though I can't imagine why it would need both; elvis doesn't use any fancy"
	why "   curses functions.  You may want to change this."
	CC="cc -std"
	NEED_STRDUP=define
	TLIBS="-lcurses -ltermcap"
	if [ "$GUI_X11" = "define" ]
	then
		XLIBS=" -ldnet"
	fi
	;;
  *hp-ux*)
	why "HP-UX must use its own compiler even if GCC is available, apparently because"
	why "   GCC doesn't support shared libraries.  Also, it uses both -lcurses and"
	why "   -ltermcap, though I can't imagine why it would need both."
	if [ X$forcegcc = Xy ]
	then
		why "... but since you used an explicit -with-gcc flag, I'll do that"
	else
		CC="cc -Ae"
		gnu=""
	fi
	NEED_OSPEED=define
	TLIBS="-lcurses -ltermcap"
	;;
  *solaris2*)
	why "For Solaris2, the standard system C compiler chokes on some standard system"
	why "   header files because of an unchecked 'const' keyword, so we add '-Dconst='"
	why "   to ensure that 'const' is ignored.  Also, if X11 is to be supported then"
	why "   we also need -lsocket -lnsl.  A -R flag may also be added so the X11"
	why "   shared libraries can be found at run time."
	CC="cc -O -Dconst="
	TLIBS="-lcurses"
	if [ "$GUI_X11" = "define" ]
	then
		XLIBS=" -lsocket -lnsl"
		xlibdir=`dirname "$xlib"`
		XLIBS=" -R$xlibdir$XLIBS"
	fi
	if [ -f /usr/ccs/lib/libtermcap.a ]
	then
		why "For Solaris2, -ltermcap is usually not necessary but since you have one and"
		why "   it is harmless, I'll add it."
		TLIBS="$TLIBS -ltermcap"
	fi
	;;
  *solaris*)
	why "For Solaris 1, no really wacky tricks are needed.  A -Dconst= flag is added"
	why "   to the compiler command to allow it to work around a `const' keyword in a"
	why "   standard system header."
	CC="cc -O -Dconst="
	TLIBS="-L/usr/ucblib -lucb -lcurses -ltermcap"
	;;
  *sunos*)
	why "For ancient SunOS, no really wacky tricks are needed.  A -Dconst= flag is added"
	why "   to the compiler command to allow it to work around a `const' keyword in a"
	why "   standard system header."
	CC="cc -O -Dconst="
	TLIBS="-ltermcap"
	;;
  *sco*)
	TLIBS="-lx -ltermcap"
	tmp=`searchpath icc $GNUPATH`
	if [ "$tmp" ]
	then
		why "For SCO, I like the icc compiler (unless gcc is available)."
		CC="icc"
		# but it may be overridden by gcc
	fi
	if [ "$GUI_X11" = "define" ]
	then
		why "For SCO, X11 requires -lsocket"
		XLIBS=" -lsocket"
		why "SCO has an <X11/Xos.h>, but it clashes with <times.h> so we leave it out"
		NEED_XOS_H="undef"
	elif [ X"$inet" != X ]
	then
		why "For SCO, any network access needs -lsocket"
		TLIBS="$TLIBS -lsocket"
	fi
	;;
  *xenix*)
	TLIBS="-lx -ltermcap"
	if [ "$GUI_X11" = "define" ]
	then
		why "For SCO Xenix, X11 requires -lsocket"
		XLIBS=" -lsocket"
	fi
	;;
  *freebsd*)
	why "For FreeBSD, we ignore the <sys/select.h> file"
	NEED_SELECT_H="undef"
	;;
  *openbsd*)
	why "For OpenBSD, we ignore the <sys/select.h> file"
	NEED_SELECT_H="undef"
	TLIBS="-lcurses"
	;;
  *bsd*)
	why "For BSD we like to use shlicc2 because it supports shared libraries"
	tmp=`searchpath shlicc2 $GNUPATH`
	if [ "$tmp" ]
	then
		CC="shlicc2"
		gnu=""
		why "   Using shlicc2, even in preference to GCC"
	else
		why "   Apparently shlicc2 doesn't exist on this system"
	fi
	if [ "$GUI_X11" = "define" ]
	then
		why "   To support X11, it also requires -lipc"
		XLIBS=" -lipc"
		why "FreeBSD requires -I/usr/X11R6/include.  Should be harmless for other BSDs"
		CC="$CC -I/usr/X11R6/include"
	fi
	;;
  *irix*)
  	# If "cc" in installed, use it in preference to "gcc"
	why "For IRIX, the standard CC is preferable to GCC"
	tmp=`searchpath cc $GNUPATH`
	if [ "$tmp" ]
	then
		CC="cc"
		gnu=""
	fi
	;;

  *cygwin*)
	why "Cygwin has no inet_aton() function even though one is declared in the headers"
	NEED_INET_ATON=define
	;;
esac
if [ -f /usr/bin/lp ]
then
	why "Assuming lpout=\"!lp -s\" because /usr/bin/lp exists"
	LPOUT="!lp -s"
else
	why "Assuming lpout=\"!lpr\" because /usr/bin/lp doesn't exist"
fi

# Add non-X11 libraries to args via the --libs=... flag
if [ "$TLIBS" ]
then
	args="$args --libs='$TLIBS'"
fi

# If "gcc" is available, and CC didn't come from environment variables, then
# use "gcc" instead of plain old "cc"
if [ "$gnu" ]
then
	why "Assuming GCC should be used because it exists and the $SYS-specific"
	why "   tweaks didn't indicate that the standard CC is better."
	CC="gcc -O2"
fi

################################################################################

# Save these arguments in a "config.stat" script
echo exec configure $args $SYS >config.stat

# Tell the user what we discovered
echo "System:   $SYS"
echo "Options: $args"
echo "Compiler: $CC"

################################################################################

#Set some options that'll be used in the here-files below
CC="$CC$USE"
if [ "$GUI_X11" = "define" ]
then
	case "$xlib" in
	  /lib/libX11.*|/usr/lib/libX11.*|"")
		XLIBS="-lX11$XLIBS"
		;;
	  *)
		XLIBS="-L`dirname $xlib` -lX11$XLIBS"
		;;
	esac
	case "$xinc" in
	  /usr/include/X11/Xresource.h)
		;;
	  *)
		x11subdir=`dirname $xinc`
		CC="$CC -I"`dirname $x11subdir`
		;;
	esac
fi
if [ "$LIBS" = "" ]
then
	LIBS="${TLIBS:--ltermcap} $NLIBS"
fi
case "$LIBS" in
  *ncurses*) NEED_BC=undef;;
  *)	     NEED_BC=define;;
esac


################################################################################


# Generate the "config.h" file
cat >config.h <<eof-config
/* config.h */

/* Originally, this file was automatically generated by the "configure"
 * shell script.
 *
 * This file contains C macro definitions which indicate which features
 * are to be supported, and which library functions are to be emulated.
 * In general, #define enables the feature or emulating function, and
 * #undef disables the feature or causes the library function to be used.
 */


/* The following determine which user interfaces are to be supported */
#${GUI_X11:-undef}	GUI_X11		/* simple X-windows interface */
#undef	GUI_CURSES	/* curses interface */
#define	GUI_TERMCAP	/* termcap interface */
#define	GUI_OPEN	/* open-mode only, does nothing fancy */


/* These allow you to selectively disable the display modes, network protocols,
 * and other optional features.  If you disable the markup display modes then
 * the :help command is disabled because it depends on the "html" markup display
 * mode.  #define to enable the mode, #undef to exclude it.
 */
#define	DISPLAY_HEX	/* hex		interactive hex dump */
#define	DISPLAY_HTML	/* html		formatted text */
#define	DISPLAY_MAN	/* man		formatted text */
#define	DISPLAY_TEX	/* tex		formatted text */
#define	DISPLAY_SYNTAX	/* syntax	generic syntax coloring */
#${PROTOCOL_HTTP}	PROTOCOL_HTTP	/* define to enable HTTP; undef to disable */
#${PROTOCOL_FTP}	PROTOCOL_FTP	/* define to enable FTP; undef to disable */
#define	FEATURE_SHOWTAG	/* the showtag option */
#define	FEATURE_LPR	/* the :lpr command */
#define	FEATURE_ALIAS	/* the :alias command */
#define	FEATURE_MKEXRC	/* the :mkexrc command */
#define	FEATURE_COMPLETE /* filename completion */
#define	FEATURE_LITRE	/* accelerate searches for literal strings */
#undef	FEATURE_RAM	/* store edit buffer in RAM if "-f ram" */
#define	FEATURE_BACKTICK /* the \`program\` notation in file names */


/* The following provide custom implementation of some common functions which
 * are either missing or poorly implemented on some systems.
 */
#undef	NEED_ABORT	/* replaces abort() with a simpler macro */
#undef	NEED_ASSERT	/* defines a custom assert() macro */
#${NEED_TGETENT:-undef}	NEED_TGETENT	/* causes tinytcap.c to be used instead of library */
#${NEED_WINSIZE:-undef}	NEED_WINSIZE	/* includes <ptem.h> -- required by SCO */
#${NEED_SPEED_T:-undef}	NEED_SPEED_T	/* includes <termcap.h> -- common on POSIX systems */
#${NEED_STRDUP:-undef}	NEED_STRDUP	/* uses a custom version of strdup() */
#${NEED_MEMMOVE:-undef}	NEED_MEMMOVE	/* uses a custom version of memmove() */
#${NEED_OSPEED:-undef}	NEED_OSPEED	/* causes guitcap.c to supply an ospeed variable */
#${NEED_BC:-undef}	NEED_BC		/* causes guitcap.c to supply a BC variable */
#${NEED_SETPGID:-undef}	NEED_SETPGID	/* use setpgrp() instead of setpgid() */
#define	NEED_CTYPE	/* uses a custom <ctype.h>, driven by :digraph */
#${NEED_WAIT_H:-undef}	NEED_WAIT_H	/* must include <sys/wait.h> */
#${NEED_SELECT_H:-undef}	NEED_SELECT_H	/* must include <sys/select.h> */
#${NEED_IOCTL_H:-undef}	NEED_IOCTL_H	/* must include <sys/ioctl.h> */
#${NEED_XOS_H:-undef}	NEED_XOS_H	/* must include <X11/Xos.h> */
#${NEED_IN_H:-undef}	NEED_IN_H	/* must include <netinet/in.h> */
#${NEED_SOCKET_H:-undef}	NEED_SOCKET_H	/* must include <sys/socket.h> */
#${NEED_XRMCOMBINEFILEDATABASE:-undef}	NEED_XRMCOMBINEFILEDATABASE	/* X11R4 needs this */
#${NEED_INET_ATON:-undef}	NEED_INET_ATON	/* SunOS, Solaris, and Cygwin need this */

/* The following control debugging features.  NDEBUG slows elvis down a lot,
 * and the others tend to make it output some confusing messages, so these
 * are all disabled by default.  (Note that NDEBUG is #define'd to disable it)
 */
#define	NDEBUG		/* undef to enable assert() calls */
#undef	DEBUG_ALLOC	/* define to debug memory allocations */
#undef	DEBUG_SCAN	/* define to debug character scans */
#undef	DEBUG_SESSION	/* define to debug the block cache */
#undef	DEBUG_EVENT	/* define to trace events */
#undef	DEBUG_MARKUP	/* define to debug markup display modes */



/* The following macros, and their values, are mostly used to determine the
 * default values of some options.
 */
#define	OSLPOUT	"${LPOUT:-!lpr}"	/* default value of lpout option */
#define OSLIBPATH "~/.elvislib:/etc/elvis:${LIBDIR}:/usr/share/doc/elvis"	/* default elvispath */
eof-config


################################################################################


# Generate a sed script for converting "Makefile.in" to "Makefile"
tmp=mfsed.$$
case "$SYS" in

*sunos*)
cat >$tmp <<eof-sunos
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC -DUSE_SGTTY!
eof-sunos
;;

*solaris*)
cat >$tmp <<eof-solaris
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-solaris
;;

*osf*)
cat >$tmp <<eof-osf
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-osf
;;

*ultrix*)
cat >$tmp <<eof-ultrix
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-ultrix
;;

*hp-ux*)
cat >$tmp <<eof-hp-ux
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-hp-ux
;;

*linux*)
cat >$tmp <<eof-linux
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-linux
;;

*sco*)
cat >$tmp <<eof-sco
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-sco
;;

*xenix*)
cat >$tmp <<eof-xenix
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-xenix
;;

*bsd*)
cat >$tmp <<eof-bsd
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC!
eof-bsd
;;

*qnx*)
cat >$tmp <<eof-qnx
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC -D_POSIX_SOURCE!
eof-qnx
;;

*aix*)
cat >$tmp <<eof-aix
s!^# Makefile.in\$!# Makefile - configured for $SYS!
s!^CC=.*!CC=$CC -D_BSD!
eof-aix
;;

*)
cat >$tmp <<eof-generic
s!^# Makefile.in\$!# Makefile - configured for generic Unix!
s!^CC=.*!CC=$CC!
eof-generic
;;

esac
cat >>$tmp <<eof-all
s!^LIBS=.*!LIBS=$XLIBS $LIBS!
s!^BINDIR=.*!BINDIR=$BINDIR!
s!^LIBDIR=.*!LIBDIR=$LIBDIR!
eof-all

# Run "Makefile.in" through that sed script, to produce "Makefile"
sed -f $tmp Makefile.in >Makefile && rm $tmp

# Some parting advice
case "$SYS" in
  *solaris*|*sunos*)
	if [ "$GUI_X11" = "define" -a "$WHY" = y ]
	then
		xlibdir=`dirname "$xlib"`
		case "$LD_LIBRARY_PATH" in
		  *X11*|*openwin*)
			# Probably do nothing
			;;
		  "")
			# set path = xlibdir
			echo "You *may* need to..."
			echo
			case "$SHELL" in
			  *csh)
			  	echo "     setenv LD_LIBRARY_PATH=$xlibdir"
				;;
			  *)
				echo "     LD_LIBRARY_PATH=$xlibdir"
				echo "     export LD_LIBRARY_PATH"
				;;
			esac
			echo
			echo "... before you can run elvis, but try running it without doing that first."
			;;
		  *)
			# add xlibdir to path
			echo "You may need to..."
			echo
			echo "     LD_LIBRARY_PATH=\$LD_LIBRARY_PATH:$xlibdir"
			echo "     export LD_LIBRARY_PATH"
			echo
			echo "... before you can run elvis"
			;;
		esac
	fi
	;;
esac