#!/bin/sh

# This is a 'configure' script for App.
#
# It looks for a variety of things such as a compiler,
# X-Windows installations, etc and generates a
# Makefile which is appropriate for your system.
# It also compiles and runs a program, apptypes,
# which generates the file apptypes.h which contains
# some important type definitions for your system.
#
# To run this script, type './configure'.


echo "# Configure script for App"

if ( [ "$0" != "./configure" ] ) then
	echo "Please run the configure program while in the src directory"
	echo "usage: ./configure [--help] [paths]"
	exit 2
fi

# PATHS is the default set of directories to search for
# programs such as gcc, ld, libraries, etc.
# If something is missing here you could add it here, or
# just supply it as a command-line parameter to this script.

PATHS="/bin /usr /usr/local /usr/bin /usr/local/bin $HOME/bin /"


# XPATHS is the default set of directories to search for
# X-Windows libraries, header files, etc.
# It automatically searches subdirectories such as lib/ and include/

XPATHS="/usr/X11 /usr/X11R6 /usr/openwin /usr/local/X11 /usr/X /usr/dt /X11 /usr /usr/local"


# Set INFO to true if you want to see what values this script uses.
# Otherwise set it to false.
# The values appear at the top of the generated Makefile anyway.

INFO=false


# Check if the user has asked for help.

if ( [ "$1" = '-?' ] ) then
	SHOW_USAGE=true
elif ( [ "$1" = 'help' ] ) then
	SHOW_USAGE=true
elif ( [ "$1" = '--help' ] ) then
	SHOW_USAGE=true
fi

if ( [ "$1" = '--info' ] ) then
	INFO=true
fi

if ( [ "$SHOW_USAGE" = 'true' ] ) then
	echo 'usage: ./configure [options] [paths]'
	echo
	echo '  Options can be:'
	echo '    -?, --help, help  see this help page'
	echo '    --info            show path to compiler, etc'
	echo '    x11               build the X11 version (default)'
	echo
	echo '  Paths are optional, and point to locations to search for'
	echo '  libraries, compilers, etc, for example:'
	echo '    ./configure /usr/X11 /usr/local/X11 /usr/bin'
	echo
	echo '  By default, paths is set to a variety of likely locations'
	echo '  but if you specify one or more paths, they will be'
	echo '  searched before the default paths.'
	exit 0
fi


# Check target options and path options.

TARGET=x11
EXTRA_PATHS=""

for OPTION in $*
do
	if ( [ "$OPTION" = 'x11' ] ) then
		TARGET=x11
	else
		EXTRA_PATHS="$EXTRA_PATHS $OPTION"
	fi
done


# Find the "which" program.

WHICH=""

if ( [ -x "/usr/bin/which" ] ) then
	WHICH="/usr/bin/which"
elif ( [ -x "/usr/local/bin/which" ] ) then
	WHICH="/usr/local/bin/which"
elif ( [ -x "/bin/which" ] ) then
	WHICH="/bin/which"
fi

# Check if gcc or cc is in the path somewhere.

if ( [ "$CC" = "" ] ) then
	# Try to find gcc

	for DIR in $EXTRA_PATHS $PATHS
	do
		if ( [ -x $DIR/gcc ] ) then
			CC=$DIR/gcc
			break
		fi
	done
fi

if ( [ "$CC" = "" ] ) then
	# Try to find gcc using the which command

	if ( [ "$WHICH" != "" ] ) then
		CC=`$WHICH gcc`
	fi
fi

if ( [ "$CC" = "" ] ) then
	# Try to find cc

	for DIR in $EXTRA_PATHS $PATHS
	do
		if ( [ -x $DIR/cc ] ) then
			CC=$DIR/cc
			break
		fi
	done
fi

if ( [ "$CC" = "" ] ) then
	# Try to find cc using the which command

	if ( [ "$WHICH" != "" ] ) then
		CC=`$WHICH cc`
	fi
fi

if ( [ "$CC" = "" ] ) then
	# Couldn't find a C compiler!
	echo 'configure: error: cannot find a C-compiler to use!'
	echo 'configure: try supplying the directory of your compiler'
	SHOW_USAGE=true
fi


# Try to find the library archiver program "ar"

if ( [ "$AR" = "" ] ) then
	for DIR in $EXTRA_PATHS $PATHS
	do
		if ( [ -x $DIR/ar ] ) then
			AR=$DIR/ar
			break
		fi
	done
fi

if ( [ "$AR" = "" ] ) then
	# Try to find ar using the which command

	if ( [ "$WHICH" != "" ] ) then
		AR=`$WHICH ar`
	fi
fi

if ( [ "$AR" = "" ] ) then
	# Couldn't find the program used to create libraries!
	echo 'configure: error: cannot find a library archiver (ar) to use!'
	echo 'configure: try supplying the ar directory as a parameter'
	SHOW_USAGE=true
fi


# Try to find the linker program "ld"

if ( [ "$LD" = "" ] ) then
	for DIR in $EXTRA_PATHS $PATHS
	do
		if ( [ -x $DIR/ld ] ) then
			LD=$DIR/ld
			break
		fi
	done
fi

if ( [ "$LD" = "" ] ) then
	# Try to find ld using the which command

	if ( [ "$WHICH" != "" ] ) then
		LD=`$WHICH ld`
	fi
fi

if ( [ "$LD" = "" ] ) then
	# Couldn't find the loader/linker!
	echo 'configure: error: cannot find a loader/linker (ld) to use!'
	echo 'configure: try supplying the ld directory as a parameter'
	SHOW_USAGE=true
fi


# Try to find the library archive indexing program "ranlib"

if ( [ "$RANLIB" = "" ] ) then
	for DIR in $EXTRA_PATHS $PATHS
	do
		if ( [ -x $DIR/ranlib ] ) then
			RANLIB=$DIR/ranlib
			break
		fi
	done
fi
if ( [ "$RANLIB" = "" ] ) then
	# no-op
	RANLIB=":"
	echo 'configure: cannot find ranlib program, assuming it is a no-op'
	echo 'configure: if this is not correct, try supplying the ranlib directory'
fi


# Try to find X-Windows libraries and include files.

X11_LIB=""
X11_LIB_DIR=""
X11_INC_DIR=""

for DIR in $EXTRA_PATHS $XPATHS $PATHS
do
	if ( [ -r $DIR/lib/libX11.so ] ) then
		X11_LIB=$DIR/lib/libX11.so
		X11_LIB_DIR=$DIR/lib
		break
	elif ( [ -r $DIR/libX11.so ] ) then
		X11_LIB=$DIR/libX11.so
		X11_LIB_DIR=$DIR
		break
	elif ( [ -r $DIR/lib/libX11.a ] ) then
		X11_LIB=$DIR/lib/libX11.a
		X11_LIB_DIR=$DIR/lib
		break
	elif ( [ -r $DIR/libX11.a ] ) then
		X11_LIB=$DIR/libX11.a
		X11_LIB_DIR=$DIR
		break
	elif ( [ -r $DIR/lib/libX11.dll.a ] ) then
		X11_LIB=$DIR/lib/libX11.dll.a
		X11_LIB_DIR=$DIR/lib
		break
	elif ( [ -r $DIR/libX11.dll.a ] ) then
		X11_LIB=$DIR/libX11.dll.a
		X11_LIB_DIR=$DIR
		break
	fi
done

for DIR in $EXTRA_PATHS $XPATHS $PATHS
do
	if ( [ -r $DIR/include/X11/Xlib.h ] ) then
		X11_INC_DIR=$DIR/include
		break
	elif ( [ -r $DIR/include/Xlib.h ] ) then
		X11_INC_DIR=$DIR/include
		break
	elif ( [ -r $DIR/Xlib.h ] ) then
		X11_INC_DIR=$DIR
		break
	fi
done

if ( [ "$X11_LIB_DIR" = "" ] ) then
	echo 'configure: error: cannot find libX11.so or libX11.a!'
	echo 'configure: try supplying the directory of libX11.a'
	SHOW_USAGE=true
fi

if ( [ "$X11_INC_DIR" = "" ] ) then
	echo 'configure: error: cannot find Xlib.h!'
	echo 'configure: try supplying the X-Windows installation directory'
	SHOW_USAGE=true
fi


# Operating-system specific stuff

if ( [ "`uname`" = "Linux" ] ) then
	DLL_FLAGS="-shared -fPIC -Bdynamic -o"
elif ( [ "`uname`" = "SunOS" ] ) then
	DLL_FLAGS="-B dynamic -o"
elif ( [ "`uname`" = "Solaris" ] ) then
	DLL_FLAGS="-B dynamic -o"
else
	# default
	DLL_FLAGS="-shared -o"
fi


# Debugging printing

if ( [ "$INFO" != "false" ] ) then
	echo "# Settings:"
	echo "CC               = $CC"
	echo "AR               = $AR"
	echo "RANLIB           = $RANLIB"
	echo "LD               = $LD"
	echo "MAKE_STATIC_LIB  = $AR rc"
	echo "MAKE_DYNAMIC_LIB = $LD $DLL_FLAGS"
	echo "X11_LIB          = $X11_LIB"
	echo "X11_LIB_DIR      = $X11_LIB_DIR"
	echo "X11_INC_DIR      = $X11_INC_DIR"
fi

# in the case of error, show usage options.

if ( [ "$SHOW_USAGE" = 'true' ] ) then
	echo
	echo 'usage: ./configure [options] [paths]'
	echo
	echo '  Options can be:'
	echo '    -?, --help, help  see this help page'
	echo '    x11               build the X11 version (default)'
	echo
	echo '  Paths are optional, and point to locations to search for'
	echo '  libraries, compilers, etc, for example:'
	echo '    ./configure /usr/X11 /usr/local/X11 /usr/bin'
	echo
	echo '  By default, paths is set to a variety of likely locations'
	echo '  but if you specify one or more paths, they will be'
	echo '  searched before the default paths.'
	exit 2
fi

# Build any utility programs that are needed.

echo "# Generating apptypes.h"
/bin/rm -f ./apptypes.h

echo "$CC apptypes.c -o apptypes"
$CC apptypes.c -o apptypes

echo "./apptypes"
./apptypes

echo "/bin/rm ./apptypes"
/bin/rm -f ./apptypes

if ( [ -r "./apptypes.h" ] ) then
	echo "# apptypes.h generated."
else
	echo 'configure: error: apptypes.h does not exist - did apptypes.c compile?'
	exit 2
fi


# Now create a Makefile.

echo "# Creating Makefile"

MAKEFILE="./Makefile"

echo                                       > "$MAKEFILE"
echo "# Makefile for App:"                >> "$MAKEFILE"
echo                                      >> "$MAKEFILE"
echo "CC               = $CC"             >> "$MAKEFILE"
echo "AR               = $AR"             >> "$MAKEFILE"
echo "RANLIB           = $RANLIB"         >> "$MAKEFILE"
echo "LD               = $LD"             >> "$MAKEFILE"
echo "MAKE_STATIC_LIB  = $AR rc"          >> "$MAKEFILE"
echo "MAKE_DYNAMIC_LIB = $LD $DLL_FLAGS"  >> "$MAKEFILE"
echo "X11_LIB          = $X11_LIB"        >> "$MAKEFILE"
echo "X11_LIB_DIR      = $X11_LIB_DIR"    >> "$MAKEFILE"
echo "X11_INC_DIR      = $X11_INC_DIR"    >> "$MAKEFILE"
echo                                      >> "$MAKEFILE"
cat ./rules/x11rules.txt                  >> "$MAKEFILE"

echo "# Makefile created."
echo "# You will need to edit utility/fontutil.c to set the font path,"
echo "# if the font path is neither /apps/app/fonts nor $HOME/apps/app/fonts"
echo "# Now type make."