#!/bin/sh

# CONFIGURE SCRIPT FOR CITADEL TEXT CLIENT
# This file is part of "conf-IG-ure"
# Copyright (C) 2016-2019 by Art Cancro
#
# This program is open source software.  Use, duplication, and/or
# disclosure are subject to the GNU General Purpose License version 3.

echo 
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
		;;
		--bindir)
			BINDIR=$v
		;;
		--etcdir)
			ETCDIR=$v
		;;
		--ctdldir)
			CTDLDIR=$v
		;;
		--with-ssl)
			SSL=yes
		;;
		--without-ssl)
			SSL=no
		;;
		*)
			echo $0 : unknown option $k
			echo
			echo Valid options are:
			echo '	--prefix=PREFIX		Install files in PREFIX [/usr/local]'
			echo '	--bindir=DIR		Install executables in DIR [PREFIX/bin]'
			echo '  --etcdir=DIR            Install citadel.rc in DIR [PREFIX/etc]'
			echo '	--ctdldir=DIR		Look for Citadel server in DIR [/usr/local/citadel]'
			echo '  --with-ssl              Force build with OpenSSL support [normally autodetected]'
			echo '  --without-ssl           Force build without OpenSSL support [normally autodetected]'
			exit 1
		;;
	esac
	shift
done


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

[ "$PREFIX" = "" ] 	&& PREFIX=/usr/local
[ "$BINDIR" = "" ]	&& BINDIR=${PREFIX}/bin
[ "$CTDLDIR" = "" ]	&& CTDLDIR=/usr/local/citadel
[ "$CFLAGS" = "" ]	&& CFLAGS='-Wformat-truncation=0 -ggdb'
[ "$LDFLAGS" = "" ]	&& LDFLAGS=''


########################################################################
# Test for OpenSSL
########################################################################
[ "$SSL" != "yes" ] && [ "$SSL" != "no" ] && {
	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);
}
!
	SSL='no';
	cc $tempcc -lssl -lcrypto -o $tempfile && $tempfile && SSL='yes'
	rm -f $tempfile 2>/dev/null
	rm -f $tempcc 2>/dev/null
}
echo SSL: $SSL
[ "$SSL" = "yes" ] && {
	CFLAGS=${CFLAGS}' -DHAVE_OPENSSL'
	LDFLAGS=${LDFLAGS}' -lssl -lcrypto -lz'
}


########################################################################
# 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.
		rm -f $tempfile 2>/dev/null
		rm -f $tempcc 2>/dev/null
		exit 1
	}
}
rm -f $tempfile 2>/dev/null
rm -f $tempcc 2>/dev/null


########################################################################
# Output the config.mk
########################################################################

(
	echo "CFLAGS := ${CFLAGS}"
	echo "LDFLAGS := ${LDFLAGS}"
	echo "PREFIX := ${PREFIX}"
	echo "BINDIR := ${BINDIR}"
	echo "CTDLDIR := ${CTDLDIR}"
) >config.mk

cat config.mk
echo