#!/bin/sh

# CONFIGURE SCRIPT FOR CITADEL SERVER
# This file is part of "conf-IG-ure"
# Copyright (C) 2016-2022 by Art Cancro
#
# This program is open source software.  Use, duplication, and/or
# disclosure are subject to the GNU General Purpose License version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

echo 
echo Running the configure script to create config.mk
echo

########################################################################
# Parse the command line arguments
########################################################################
for x in $*
do
	a=$1
	k=`echo $a | awk -F= ' { print $1 } '`
	v=`echo $a | awk -F= ' { print $2 } '`

	case $k in
		--prefix)
			PREFIX=$v
		;;
		--ctdldir)
			CTDLDIR=$v
		;;
		*)
			echo $0 : unknown option $k
			echo
			echo Valid options are:
			echo '	--ctdldir=DIR		Install Citadel server to DIR [/usr/local/citadel]'
			exit 1
		;;
	esac
	shift
done


########################################################################
# Set any missing values
########################################################################

# Accept PREFIX as a substitute for CTDLDIR, but only if CTDLDIR is not already set
[ "$CTDLDIR" = "" ] && [ "$PREFIX" != "" ] && CTDLDIR=$PREFIX

# Configure the directory into which Citadel Server will be installed.
[ "$CTDLDIR" = "" ] && CTDLDIR=/usr/local/citadel

# Permit override of CFLAGS and LDFLAGS using environment variables
[ "$CFLAGS" = "" ]	&& CFLAGS='-ggdb -Wno-discarded-qualifiers'
[ "$LDFLAGS" = "" ]	&& LDFLAGS=''


########################################################################
# Test for OpenSSL
########################################################################
echo Testing for OpenSSL...
tempfile=`tempfile 2>/dev/null` || tempfile=/tmp/configure.$$
tempcc=${tempfile}.c
cat >$tempcc <<!
#include <openssl/ssl.h>
int main(int argc, char **argv) {
	SSL_load_error_strings();
	exit(0);
}
!
cc $tempcc -lssl -lcrypto -o $tempfile && $tempfile && {
	CFLAGS=${CFLAGS}' -DHAVE_OPENSSL'
	LDFLAGS=${LDFLAGS}' -lssl -lcrypto -lz'
} || {
	echo Citadel Server requires OpenSSL which is not present.
	exit 2
}


########################################################################
# Test for iconv
########################################################################
echo Testing for iconv...
tempfile=`tempfile 2>/dev/null` || tempfile=/tmp/configure.$$
tempcc=${tempfile}.c
cat >$tempcc <<!
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <iconv.h>
int main(int argc, char **argv) {
	size_t wow = iconv(NULL, NULL, NULL, NULL, NULL);
	return(0);
}
!

cc $tempcc -o $tempfile && {
	ICONV='yes'
	echo iconv.h is present and requires no additional libraries
} || {
	echo Trying again with -liconv...
	cc $tempcc -liconv -o $tempfile && {
		ICONV='yes'
		LDFLAGS=${LDFLAGS}' -liconv'
	} || {
		echo Citadel Server requires iconv character set conversion.
		exit 1
	}
}


########################################################################
# FIXME do a real build id here
########################################################################
CFLAGS=${CFLAGS}' -DBUILD_ID=\"unknown\"'
CFLAGS=${CFLAGS}' -DCTDLDIR=\"'${CTDLDIR}'\"'


########################################################################
# Output the config.mk
########################################################################
(
	echo '# config.mk is generated by configure'
	echo "CTDLDIR := ${CTDLDIR}"
	echo "CFLAGS := ${CFLAGS}"
	echo "LDFLAGS := ${LDFLAGS}"
) >config.mk

cat config.mk
echo