#! /bin/sh
# @configure_input@
#---------------------------------------------------------------------------#
# Copyright (C) 1995-1997 The University of Melbourne.
# This file may only be copied under the terms of the GNU General
# Public License - see the file COPYING in the Mercury distribution.
#---------------------------------------------------------------------------#

# C2INIT - Convert *.c to *_init.c
#
# This script outputs an appropriate init.c, given the .c files.
# Type `c2init --help' for usage message.
#

# IMPORTANT: the manpage is produced automatically from this help
# message, so if you change the help message, don't forget to check
# that the manpage still looks OK.
Help="\
Name:	c2init - Create Mercury initialization file.
Usage:	c2init [options] modules ...
Options: 
	-l, --library
		Don't generate a \`main()' function.
		Instead, generate a function
			mercury_main(int argc, char **argv);
		(declared in \"init.h\") that can be called from C code.
		(A more fine-grained interface is also available;
		see \"init.h\" for details.)
	-c <n>, --max-calls <n>
		Break up the initialization into groups of at most <n> function
		calls.  (Default value of <n> is 40.)
	-w <label>, --entry-point <label>
		Set entry point to <label>.
		(Default value is \`mercury__main_2_0'.)
Environment variables:
	MERCURY_MOD_LIB_DIR, MERCURY_MOD_LIB_MODS, MERCURY_MKINIT.
"

MERCURY_MOD_LIB_DIR=${MERCURY_MOD_LIB_DIR=@LIBDIR@/modules}
MERCURY_MOD_LIB_MODS=${MERCURY_MOD_LIB_MODS=$MERCURY_MOD_LIB_DIR/*}
MKINIT=${MERCURY_MKINIT=mkinit}

# maximum number of calls to put in a single function
maxcalls=40
defentry=mercury__main_2_0
library_opt=""
while true; do
	case "$1" in
	-c|--max-calls)
		maxcalls="$2"; shift; shift;;
	-w|--entry-point)
		defentry="$2"; shift; shift;;
	-l|--library)
		library_opt="-l"; shift;;
	-l-|--no-library)
		library_opt=""; shift;;
	-h|--help|"-?")
		echo "$Help"
		exit 0;;
	--)
		shift; break;;
	-*)
		echo "`basename $0`: invalid option \`$1'" 1>&2;
		echo "Try \`$0 --help' for help." 1>&2;
		exit 1;;
	*)
		break;;
	esac
done

case $# in
	0) exec $MKINIT -w"$defentry" -c"$maxcalls" $library_opt \
		$MERCURY_MOD_LIB_MODS
	   ;;
	*) exec $MKINIT -w"$defentry" -c"$maxcalls" $library_opt \
		"$@" $MERCURY_MOD_LIB_MODS
	   ;;
esac