#!/usr/bin/perl
###################################################
# InspIRCd Configuration Script
#
# Copyright 2002-2007 The InspIRCd Development Team
#  http://www.inspircd.org/wiki/index.php/Credits
#
# Licensed under GPL, please see the COPYING file
# for more information
#
# $Id$
#
###################################################

require 5.8.0;
use Socket;
use Cwd;
use Getopt::Long;

# Utility functions for our buildsystem
use make::utilities;
use make::configure;
use make::gnutlscert;
use make::opensslcert;

###############################################################################################
#
#                                   EDITABLE VARIABLES
#
###############################################################################################

# If you wish to ignore a dependency throughout the entire core, add it here.

my @ignoredeps = (
	"inspircd_win32wrapper.h",	# windows has its own configure program
);

# If you wish for all files in the entire core to have a given dependency, insert it here.
# You should keep this to an absolute minimum to avoid rebuilds that are not neccessary.

my @immutabledeps = (
	"inspircd_config.h",		# auto re-generated by configure
	"inspircd.h",
);

###############################################################################################
#
#                                 NON-EDITABLE VARIABLES
#
###############################################################################################

# This is a list of all files in the core. Each cpp file is mapped to a shared object file,
# whos file extension is omitted (these can vary from system to system). Auto detected by
# scanning the src/*.cpp files for files containing /* $Core: */ identifiers.

my %filelist = ();

# If you wish for a file to have special dependencies in the makefile, add an entry here.
# Auto populated by /* $ExtraDeps: */ instruction

my %specialdeps = ();

# If you wish for a file to have extra make lines (in between the compile and link steps)
# then insert them here.
# Auto populated by /* $ExtraBuild: */ instruction
        
my %extrabuildlines = ();

# If you wish for a file to be linked against extra objects or arctives, insert them here.
# Auto populated by /* $ExtraObjects: */ instruction

my %extraobjects = ();

# If you wish to compile extra cpp sources into an object, define them here.
# NOTE: Certain cpp files such as the socket engines have a value auto calculated
# for this table so that their derived class is built.
# Auto populated by /* $ExtraSources: */ instruction

my %extrasources = ();


GetOptions (
	'enable-gnutls' => \$opt_use_gnutls,
	'rebuild' => \$opt_rebuild,
	'enable-openssl' => \$opt_use_openssl,
	'disable-interactive' => \$opt_nointeractive,
	'with-nick-length=i' => \$opt_nick_length,
	'with-channel-length=i' => \$opt_chan_length,
	'with-max-clients=i' => \$opt_maxclients,
	'enable-ports' => \$opt_ports,
	'enable-epoll' => \$opt_epoll,
	'enable-kqueue' => \$opt_kqueue,
	'disable-ports' => \$opt_noports,
	'disable-epoll' => \$opt_noepoll,
	'disable-kqueue' => \$opt_nokqueue,
	'enable-ipv6' => \$opt_ipv6,
	'enable-remote-ipv6' => \$opt_ipv6links,
	'disable-remote-ipv6' => \$opt_noipv6links,
	'with-cc=s' => \$opt_cc,
	'with-ident-length=i' => \$opt_ident,
	'with-quit-length=i' => \$opt_quit,
	'with-topic-length=i' => \$opt_topic,
	'with-maxbuf=i' => \$opt_maxbuf,
	'with-kick-length=i' => \$opt_kick,
	'with-gecos-length=i' => \$opt_gecos,
	'with-away-length=i' => \$opt_away,
	'with-max-modes=i' => \$opt_modes,
	'prefix=s' => \$opt_base_dir,
	'config-dir=s' => \$opt_config_dir,
	'module-dir=s' => \$opt_module_dir,
	'binary-dir=s' => \$opt_binary_dir,
	'library-dir=s' => \$opt_library_dir,
	'disable-debuginfo' => sub { $opt_disable_debug = 1 },
	'help'	=> sub { showhelp(); },
	'modupdate' => sub { modupdate(); },
	'update' => sub { update(); },
	'svnupdate' => sub { svnupdate(); },
	'clean' => sub { clean(); },
);

my $non_interactive = (
	(defined $opt_library_dir) ||
	(defined $opt_base_dir) ||
	(defined $opt_config_dir) ||
	(defined $opt_module_dir) ||
	(defined $opt_base_dir) ||
	(defined $opt_binary_dir) ||
	(defined $opt_nointeractive) ||
	(defined $opt_away) ||
	(defined $opt_gecos) ||
	(defined $opt_kick) ||
	(defined $opt_maxclients) ||
	(defined $opt_modes) ||
	(defined $opt_topic) ||
	(defined $opt_quit) ||
	(defined $opt_ident) ||
	(defined $opt_cc) ||
	(defined $opt_ipv6) ||
	(defined $opt_ipv6links) ||
	(defined $opt_noipv6links) ||
	(defined $opt_kqueue) ||
	(defined $opt_epoll) ||
	(defined $opt_ports) ||
	(defined $opt_maxchans) ||
	(defined $opt_opermaxchans) ||
	(defined $opt_chan_length) ||
	(defined $opt_nick_length) ||
	(defined $opt_use_openssl) ||
	(defined $opt_nokqueue) ||
	(defined $opt_noepoll) ||
	(defined $opt_noports) ||
	(defined $opt_maxbuf) ||
	(defined $opt_use_gnutls)
);
my $interactive = !$non_interactive;


chomp($topdir = getcwd());
$this = resolve_directory($topdir);						# PWD, Regardless.
@modlist = ();							  		# Declare for Module List..
%config = ();						   			# Initiate Configuration Hash..
$config{ME}		 = resolve_directory($topdir);				# Present Working Directory

$config{BASE_DIR}	   = $config{ME};

if (defined $opt_base_dir)
{
	$config{BASE_DIR} = $opt_base_dir;
}

$config{CONFIG_DIR}	 = resolve_directory($config{BASE_DIR}."/conf");	# Configuration Directory
$config{MODULE_DIR}	 = resolve_directory($config{BASE_DIR}."/modules");	# Modules Directory
$config{BINARY_DIR}	 = resolve_directory($config{BASE_DIR}."/bin");		# Binary Directory
$config{LIBRARY_DIR}	= resolve_directory($config{BASE_DIR}."/lib");		# Library Directory

if (defined $opt_config_dir)
{
	$config{CONFIG_DIR} = $opt_config_dir;
}
if (defined $opt_module_dir)
{
	$config{MODULE_DIR} = $opt_module_dir;
}
if (defined $opt_binary_dir)
{
	$config{BINARY_DIR} = $opt_binary_dir;
}
if (defined $opt_library_dir)
{
	$config{LIBRARY_DIR} = $opt_library_dir;
}
chomp($config{HAS_GNUTLS}   = `libgnutls-config --version 2>/dev/null | cut -c 1,2,3`); # GNUTLS Version.
chomp($config{HAS_OPENSSL}  = `pkg-config --modversion openssl 2>/dev/null`);		# Openssl version
chomp($gnutls_ver = $config{HAS_GNUTLS});
chomp($openssl_ver = $config{HAS_OPENSSL});
$config{USE_GNUTLS}	    = "n";
if (defined $opt_use_gnutls)
{
	$config{USE_GNUTLS} = "y";					# Use gnutls.
}
$config{USE_OPENSSL}	= "n";						# Use openssl.
if (defined $opt_use_openssl)
{
	$config{USE_OPENSSL} = "y";
}

# no, let's not change these.
$config{OPTIMITEMP}	 = "0";			      			# Default Optimisation Value
if (!defined $opt_disable_debug)
{
	$config{OPTIMISATI}	 = "-g1";			     	# Optimisation Flag
}
else
{
	$config{OPTIMISATI}	 = "-O2";				# DEBUGGING OFF!
}

$config{NICK_LENGT}	 = "31";			     		# Default Nick Length
if (defined $opt_nick_length)
{
	$config{NICK_LENGT} = $opt_nick_length;
}
$config{CHAN_LENGT}	 = "64";			     		# Default Channel Name Length
if (defined $opt_chan_length)
{
	$config{CHAN_LENGT} = $opt_chan_length;
}
$config{MAXI_MODES}	 = "20";			     		# Default Max. Number of Modes set at once.
if (defined $opt_modes)
{
	$config{MAXI_MODES} = $opt_modes;
}
$config{HAS_STRLCPY}	= "false";			  		# strlcpy Check.
$config{HAS_STDINT}	 = "false";					# stdint.h check
$config{USE_KQUEUE}	 = "y";						# kqueue enabled
if (defined $opt_kqueue)
{
	$config{USE_KQUEUE} = "y";
}
if (defined $opt_nokqueue)
{
	$config{USE_KQUEUE} = "n";
}
$config{USE_EPOLL}	  = "y";					# epoll enabled
if (defined $opt_epoll)
{
	$config{USE_EPOLL} = "y";
}
if (defined $opt_noepoll)
{
	$config{USE_EPOLL} = "n";
}
$config{USE_PORTS}	  = "y";					# epoll enabled
if (defined $opt_ports)
{
	$config{USE_PORTS} = "y";
}
if (defined $opt_noports)
{
	$config{USE_PORTS} = "n";
}
$config{IPV6}	       = "n";						# IPv6 support (experimental)
if (defined $opt_ipv6)
{
	$config{IPV6} = "y";
}
$config{SUPPORT_IP6LINKS}   = "y";					# IPv4 supporting IPv6 links (experimental)
if (defined $opt_ipv6links)
{
	$config{SUPPORT_IP6LINKS} = "y";
}
if (defined $opt_noipv6links)
{
	$config{SUPPORT_IP6LINKS} = "n";
}
chomp($config{MAX_CLIENT_T} = `sh -c \"ulimit -n\"`);	   		# FD Limit
chomp($config{MAX_DESCRIPTORS} = `sh -c \"ulimit -n\"`);		# Hard FD Limit
chomp($config{GCCVER}       = `g++ -dumpversion | cut -c 1`);   	# Major GCC Version
$config{_SOMAXCONN} = SOMAXCONN;					# Max connections in accept queue
$config{OSNAME}       	    = $^O;			      		# Operating System Name
$config{IS_DARWIN}	  = "NO";					# Is OSX?
$config{STARTSCRIPT}	  = "inspircd";			# start script?
$config{DESTINATION}	  = "BASE";				# Is target path.
$config{EXTRA_DIR}	  = "";						# Is empty.
if ($config{OSNAME} =~ /darwin/i)
{
	$config{IS_DARWIN} = "YES";
	$config{STARTSCRIPT}	  = "org.inspircd.plist";		# start script for OSX.
	$config{DESTINATION}	  = "LAUNCHDPATH";				# Is OSX target.
	$config{EXTRA_DIR}	    = " launchd_dir";				# Is OSX specific path.
}
$config{CC} 		    = "g++";						# C++ compiler
if (defined $opt_cc)
{
	$config{CC} = $opt_cc;
}
$exec = $config{CC} . " -dumpversion | cut -c 1";
chomp($config{GCCVER}		= `$exec`);				# Major GCC Version
$config{MAKEORDER}		= "ircd mods";				# build order
$config{MAX_IDENT}		= "12";					# max ident size
$config{MAX_QUIT}		= "255";				# max quit message size
$config{MAX_TOPIC}		= "307";				# max topic size
$config{MAX_KICK}		= "255";				# max kick message size
$config{MAX_GECOS}		= "128";				# max GECOS size
$config{MAX_AWAY}		= "200";				# max AWAY size
$config{MAXBUF}			= "512";				# Max buffer size
if (defined $opt_ident)
{
	$config{MAX_IDENT} = $opt_ident;
}
if (defined $opt_quit)
{
	$config{MAX_QUIT} = $opt_quit;
}
if (defined $opt_topic)
{
	$config{MAX_TOPIC} = $opt_topic;
}
if (defined $opt_kick)
{
	$config{MAX_KICK} = $opt_kick;
}
if (defined $opt_gecos)
{
	$config{MAX_GECOS} = $opt_gecos;
}
if (defined $opt_away)
{
	$config{MAX_AWAY} = $opt_away;
}

$config{HAS_OPENSSL} =~ /^([-[:digit:].]+)([a-z])?(\-[a-z][0-9])?$/;
$config{HAS_OPENSSL} = $1;

if ($config{GCCVER} eq "") {
	print $config{CC} . " was not found! You require g++ (the GNU C++ compiler, part of GCC) to build InspIRCd!\n";
	exit;
}

if (!$config{MAX_CLIENT_T}) { 
	$config{MAX_CLIENT_T} = 1024;				 # Set a reasonable 'Default'
	$fd_scan_fail = "true";				       # Used Later
}

# Get and Set some important vars..
getmodules();

sub clean
{
	system("rm -rf .config.cache");
}

sub update
{
	eval {
		chomp($topdir = getcwd());
		$this = resolve_directory($topdir);					     # PWD, Regardless.
		getmodules();
		# Does the cache file exist?
		if (!getcache()) {
			# No, No it doesn't.. *BASH*
			print "You have not run ./configure before. Please do this before trying to run the update script.\n";
			exit 0;
		} else {
			# We've Loaded the cache file and all our variables..
			print "Updating Files..\n";
			getosflags();
			if ($opt_disable_debug == 1)
			{
				print "Disabling debug information (-g).\n";
				$config{OPTIMISATI} = "";
				getosflags();
			}
			$has_epoll = $config{HAS_EPOLL};
			$has_ports = $config{HAS_PORTS};
			$has_kqueue = $config{HAS_KQUEUE};
			writefiles(1);
			makecache();
			print "Complete.\n";
			exit;
		}
	};
	if ($@)
	{
		print "Configure update failed: $@\n";
	}
	exit;
}

sub modupdate
{
	eval {
		chomp($topdir = getcwd());
		$this = resolve_directory($topdir);					     # PWD, Regardless.
		getmodules();
		# Does the cache file exist?
		if (!getcache()) {
			# No, No it doesn't.. *BASH*
			print "You have not run ./configure before. Please do this before trying to run the update script.\n";
			exit 0;
		} else {
			# We've Loaded the cache file and all our variables..
			print "Updating Files..\n";
			getosflags();
			$has_epoll = $config{HAS_EPOLL};
			$has_ports = $config{HAS_PORTS};
			$has_kqueue = $config{HAS_KQUEUE};
			writefiles(0);
			makecache();
			print "Complete.\n";
			exit;
		}
	};
	if ($@)
	{
		print "Module update failed: $@\n";
	}
	exit;
}



sub svnupdate
{
	my $fail = 0;
	open(FH,"<.svn/entries") or $fail = 1;
	if ($fail) {
		print "This is not an SVN copy of InspIRCd.\n";
		exit;
	}
	else
	{
		close(FH);
	}
	system("svn update");
	system("perl configure -update");
	if (defined $opt_rebuild) {
		system("make install");
	}
	exit;
}

print "Running non-interactive configure...\n" unless $interactive;
print "Checking for cache from previous configure... ";
print ((!getcache()) ? "not found\n" : "found\n");
print "Checking operating system version... ";
print getosflags() . "\n";

if (defined $opt_maxclients)
{
	$config{MAX_CLIENT} = $opt_maxclients;
}

if (!$config{MAX_CLIENT}) { 
	# If the cache hasn't set the max clients, copy the variable of MAX_CLIENT_T, this
	# allows us to keep _T for testing purposes. (ie. "Are you sure you want to go
	# higher than the found value" :))
	$config{MAX_CLIENT} = $config{MAX_CLIENT_T};
}

printf "Checking if stdint.h exists... ";
$config{HAS_STDINT} = "true";
my $fail = 0;
open(STDINT, "</usr/include/stdint.h") or $config{HAS_STDINT} = "false";
if ($config{HAS_STDINT} eq "true") {
	close(STDINT);
}
print "yes\n" if $config{HAS_STDINT} eq "true";
print "no\n" if $config{HAS_STDINT} eq "false";


printf "Checking if strlcpy exists... ";
# Perform the strlcpy() test..
$config{HAS_STRLCPY} = "false";
my $fail = 0;
open(STRLCPY, "</usr/include/string.h") or $fail = 1;
if (!$fail) {
	while (chomp($line = <STRLCPY>)) {
		# try and find the delcaration of:
		# size_t strlcpy(...)
		if ($line =~ /size_t(\0x9|\s)+strlcpy/)	{
			$config{HAS_STRLCPY} = "true";
		}
	}
	close(STRLCPY);
}
print "yes\n" if $config{HAS_STRLCPY} eq "true";
print "no\n" if $config{HAS_STRLCPY} eq "false";


printf "Checking if kqueue exists... ";
$has_kqueue = 0;
$fail = 0;
open(KQUEUE, "</usr/include/sys/event.h") or $fail = 1;
if (!$fail) {
	while (chomp($line = <KQUEUE>)) {
		# try and find the delcaration of:
		# int kqueue(void);
		if ($line =~ /int(\0x9|\s)+kqueue/) {
			$has_kqueue = 1;
		}
	}
	close(KQUEUE);
}
print "yes\n" if $has_kqueue == 1;
print "no\n" if $has_kqueue == 0;

printf "Checking if epoll exists... ";
$has_epoll = 0;
$fail = 0;
open(EPOLL, "</usr/include/sys/epoll.h") or $fail = 1;
if (!$fail) {
	$has_epoll = 1;
	close(EPOLL);
}
if ($has_epoll) {
	my $kernel = `uname -r`;
	chomp($kernel);
	if (($kernel =~ /^2\.0\./) || ($kernel =~ /^2\.2\./) || ($kernel =~ /^2\.4\./)) {
		$has_epoll = 0;
	}
	else
	{
		# Suggestion from nenolod, weed out odd systems which have glibc built
		# against 2.4 kernels (ick)
		my $kernel_arch = `uname -p`;
		chomp($kernel_arch);
		$libcv = 0.0;
		$kernelv = 0.0;
		if ($kernel_arch =~ /x86_64/) {
			open (FH,"/lib64/libc.so.6|") or $has_epoll = 0;
		}
		else {
			open (FH,"/lib/libc.so.6|") or $has_epoll = 0;
		}
		if ($has_epoll)
		{
			while (chomp($line = <FH>))
			{
				if ($line =~ /GNU C Library .* version (.*?) /)
				{
					$libcv = $1;
					$libcv =~  /(\d+\.\d+)/;
					$libcv = $1;
				}
				elsif ($line =~ /Compiled on a Linux (.*?\..*?)\.* system/)
				{
					$kernelv = $1;
					# Fix for some retarded libc builds, strip off >> and << etc.
					$kernelv =~ /(\d+\.\d+)/;
					$kernelv = $1;
				}
			}
			close FH;
			if ($libcv < 2.3)
			{
				$has_epoll = 0;
				printf "libc too old: $libcv... ";
			}
			if ($kernelv < 2.6)
			{
				$has_epoll = 0;
				printf "libc built against older kernel $kernelv... ";
			}
		}
	}
}
print "yes\n" if $has_epoll == 1;
print "no\n" if $has_epoll == 0;

printf "Checking if Solaris I/O completion ports are available... ";
$has_ports = 0;
my $system = `uname -s`;
chomp ($system);
$has_ports = 1 if ($system eq "SunOS");

if ($has_ports) {
	my $kernel = `uname -r`;
	chomp($kernel);
	if (($kernel !~ /^5\.1./)) {
		$has_ports = 0;
	}
}
print "yes\n" if $has_ports == 1;
print "no\n" if $has_ports == 0;

$config{HAS_EPOLL} = $has_epoll;
$config{HAS_KQUEUE} = $has_kqueue; 

printf "Checking for libgnutls... ";
if (($config{HAS_GNUTLS}) && (($config{HAS_GNUTLS} >= 1.2) || ($config{HAS_GNUTLS} eq "y"))) {
	print "yes\n";
	$config{HAS_GNUTLS} = "y";
} else {
	print "no\n";
	$config{HAS_GNUTLS} = "n";
}

printf "Checking for openssl... ";
if (($config{HAS_OPENSSL}) && (($config{HAS_OPENSSL} >= 0.8) || ($config{HAS_OPENSSL} eq "y"))) {
	print "yes\n";
	$config{HAS_OPENSSL} = "y";
} else {
	print "no\n";
	$config{HAS_OPENSSL} = "n";
}

printf "Checking if you are running an ancient, unsupported OS... ";
if ($config{OSNAME} =~ /FreeBSD/i)
{
	$version = `uname -r`;
	if ($version =~ /^4\./)
	{
		$foundit = `ls -l /usr/local/lib/libgnugetopt* | wc -l`;
		if ($foundit > 0)
		{
			# ICKY ICKY ICK, FREEBSD 4.x! GET AN UPGRADE!
			$config{CRAQ} = "-L/usr/local/lib -lgnugetopt -DHAVE_DECL_GETOPT=1";
			print "yes\n";
		}
		else
		{
			print "\n\nERROR: You require libgnugetopt (from ports or packages) to build InspIRCd on FreeBSD 4.11.\n";
		}
 	}
	else
	{
		$config{CRAQ} = " ";
		print "no ($version)\n";
	}
}
else
{
	$config{CRAQ} = " ";
	print "no ($config{OSNAME})\n";
}

################################################################################
#			  BEGIN INTERACTIVE PART			      #
################################################################################

# Clear the Screen..
if ($interactive)
{
	system("clear");
	$wholeos = $^O;

	my $rev = getrevision();
	# Display Introduction Message..
	print "
Welcome to the \033[1mInspIRCd\033[0m Configuration program! (\033[1minteractive mode\033[0m)
\033[1mPackage maintainers: Type ./configure --help for non-interactive help\033[0m

*** If you are unsure of any of these values, leave it blank for    ***
*** standard settings that will work, and your server will run      ***
*** using them. Please consult your IRC network admin if in doubt.  ***

Press \033[1m<RETURN>\033[0m to accept the default for any option, or enter
a new value. Please note: You will \033[1mHAVE\033[0m to read the docs
dir, otherwise you won't have a config file!

Your operating system is: \033[1;32m$config{OSNAME}\033[0m ($wholeos)
Maximum file descriptors: \033[1;32m$config{MAX_CLIENT_T}\033[0m
Your InspIRCd revision ID is \033[1;32mr$rev\033[0m";
	if ($rev eq "r0") {
		print " (Non-SVN build)";
	}
	print ".\n\n";

	$config{CHANGE_COMPILER} = "n";
	print "I have detected the following compiler: \033[1;32m$config{CC}\033[0m (version \033[1;32m$config{GCCVER}.x\033[0m)\n";

	while (($config{GCCVER} < 3) || ($config{GCCVER} eq "")) {
		print "\033[1;32mIMPORTANT!\033[0m A GCC 2.x compiler has been detected, and
should NOT be used. You should probably specify a newer compiler.\n\n";
		yesno(CHANGE_COMPILER,"Do you want to change the compiler?");
		if ($config{CHANGE_COMPILER} =~ /y/i) {
			print "What command do you want to use to invoke your compiler?\n";
			print "[\033[1;32m$config{CC}\033[0m] -> ";
			chomp($config{CC} = <STDIN>);
			if ($config{CC} eq "") {
				$config{CC} = "g++";
			}
			chomp($foo = `$config{CC} -dumpversion | cut -c 1`);
			if ($foo ne "") {
				chomp($config{GCCVER}       = `$config{CC} -dumpversion | cut -c 1`); # we must redo these if we change compilers
				print "Queried compiler: \033[1;32m$config{CC}\033[0m (version \033[1;32m$config{GCCVER}.x\033[0m)\n";
				if ($config{GCCVER} < 3) {
					print "\033[1;32mGCC 2.x WILL NOT WORK!\033[0m. Let's try that again, shall we?\n";
				}
			}
			else {
				print "\033[1;32mWARNING!\033[0m Could not execute the compiler you specified. You may want to try again.\n";
			}
		}
	}

	print "\n";

	# Directory Settings..
	my $tmpbase = $config{BASE_DIR};
	dir_check("do you wish to install the InspIRCd base", "BASE_DIR");
	if ($tmpbase ne $config{BASE_DIR}) {
		$config{CONFIG_DIR}	 = resolve_directory($config{BASE_DIR}."/conf");	   # Configuration Dir
		$config{MODULE_DIR}	 = resolve_directory($config{BASE_DIR}."/modules");	# Modules Directory
		$config{BINARY_DIR}	 = resolve_directory($config{BASE_DIR}."/bin");	    # Binary Directory
		$config{LIBRARY_DIR}	= resolve_directory($config{BASE_DIR}."/lib");	    # Library Directory
	}

	dir_check("are the configuration files", "CONFIG_DIR");
	dir_check("are the modules to be compiled to", "MODULE_DIR");
	dir_check("is the IRCd binary to be placed", "BINARY_DIR");
	dir_check("are the IRCd libraries to be placed", "LIBRARY_DIR");

	if ($has_kqueue) {
		yesno(USE_KQUEUE,"You are running a BSD operating system, and kqueue\nwas detected. Would you like to enable kqueue support?\nThis is likely to increase performance.\nIf you are unsure, answer yes.\n\nEnable kqueue?");
		print "\n";
	}
	if ($has_epoll) {
		yesno(USE_EPOLL,"You are running a Linux 2.6+ operating system, and epoll\nwas detected. Would you like to enable epoll support?\nThis is likely to increase performance.\nIf you are unsure, answer yes.\n\nEnable epoll?");
		print "\n";
	}
	if ($has_ports) {
		yesno(USE_PORTS,"You are running Solaris 10.\nWould you like to enable I/O completion ports support?\nThis is likely to increase performance.\nIf you are unsure, answer yes.\n\nEnable support for I/O completion ports?");
		print "\n";
	}
	$chose_hiperf = (($config{USE_EPOLL} eq "y") || ($config{USE_KQUEUE} eq "y") || ($config{USE_PORTS} eq "y"));
	if (!$chose_hiperf) {
		print "No high-performance socket engines are available, or you chose\n";
		print "not to enable one. Defaulting to select() engine.\n\n";
	}

	yesno(IPV6,"Would you like to build InspIRCd with IPv6 support?");
	print "\n";

	if ($config{IPV6} eq "y") {
		print "You have chosen to build an \033[1;32mIPV6-enabled\033[0m server.\nTo accept IPV4 users, you can still use IPV4 addresses\nin your port bindings..\n\n";
		$config{SUPPORT_IP6LINKS} = "y";
	} else {
		yesno(SUPPORT_IP6LINKS,"You have chosen to build an \033[1;32mIPV4-only\033[0m server.\nWould you like to enable support for linking to IPV6-enabled\nInspIRCd servers?\nIf you are using a recent operating\nsystem and are unsure, answer yes.\nIf you answer 'no' here, your InspIRCd server will be unable\nto parse IPV6 addresses (e.g. for CIDR bans)");
		print "\n";
	}

	if (($config{HAS_GNUTLS} eq "y") && ($config{HAS_OPENSSL} eq "y")) {
		print "I have detected both \033[1;32mGnuTLS\033[0m and \033[1;32mOpenSSL\033[0m on your system.\n";
		print "I will default to GnuTLS. If you wish to use OpenSSL\n";
		print "instead, you should enable the OpenSSL module yourself\n";
		print "by copying it from src/modules/extra to src/modules.\n\n";
		print "Detected GnuTLS version: \033[1;32m" . $gnutls_ver . "\033[0m\n";
		print "Detected OpenSSL version: \033[1;32m" . $openssl_ver . "\033[0m\n\n";
	}

	if ($config{HAS_GNUTLS} eq "y") {
		yesno(USE_GNUTLS, "Would you like to enable SSL Support?");
		if ($config{USE_GNUTLS} eq "y") {
			print "\nUsing GnuTLS SSL module.\n";
		}
	} elsif	($config{HAS_OPENSSL} eq "y") {
			yesno(USE_OPENSSL, "Would you like to enable SSL Support?");
	if ($config{USE_OPENSSL} eq "y") {
			print "\nUsing OpenSSL SSL module.\nYou will get better performance if you move to GnuTLS in the future.\n";
		}
	}
	else {
		print "\nCould not detect OpenSSL or GnuTLS. Make sure pkg-config is installed if\nyou intend to use OpenSSL, or that GnuTLS is in your path if you intend\nto use GnuTLS.\n\n";
	}

	print "\nThe following questions will ask you for various figures relating\n";
	print "To your IRCd install. Please note that these should usually be left\n";
	print "as defaults unless you have a real reason to change them. If they\n";
	print "changed, then the values must be identical on all servers on your\n";
	print "network, or malfunctions and/or crashes may occur, with the exception\n";
	print "of the 'maximum number of clients' setting which may be different on\n";
	print "different servers on the network.\n\n";

	# File Descriptor Settings..
	promptnumeric("number of clients at any one time", "MAX_CLIENT_T");
	$config{MAX_CLIENT} = $config{MAX_CLIENT_T};
	$config{MAX_DESCRIPTORS} = $config{MAX_CLIENT_T};

	promptnumeric("length of nicknames", "NICK_LENGT");
	promptnumeric("length of channel names", "CHAN_LENGT");
	promptnumeric("number of mode changes in one line", "MAXI_MODES");
	promptnumeric("length of an ident (username)", "MAX_IDENT");
	promptnumeric("length of a quit message", "MAX_QUIT");
	promptnumeric("length of a channel topic", "MAX_TOPIC");
	promptnumeric("length of a kick message", "MAX_KICK");
	promptnumeric("length of a GECOS (real name)", "MAX_GECOS");
	promptnumeric("length of an away message", "MAX_AWAY");
}

dumphash();

if (($config{USE_GNUTLS} eq "y") && ($config{HAS_GNUTLS} ne "y"))
{
	print "Sorry, but i couldn't detect gnutls. Make sure gnutls-config is in your path.\n";
	exit(0);
}
if (($config{USE_OPENSSL} eq "y") && ($config{HAS_OPENSSL} ne "y"))
{
	print "Sorry, but i couldn't detect openssl. Make sure openssl is in your path.\n";
	exit(0);
}

if ($config{USE_GNUTLS} eq "y") {
	$failed = 0;
	open(TMP, "<src/modules/m_ssl_gnutls.cpp") or $failed = 1;
	close(TMP);
	if ($failed) {
		print "Symlinking src/modules/m_ssl_gnutls.cpp from extra/\n";
		chdir("src/modules");
		system("ln -s extra/m_ssl_gnutls.cpp");
		chdir("../..");
	}
	getmodules();
	if ($interactive)
	{
		$failed = 0;
		open(TMP, "<$config{CONFIG_DIR}/key.pem") or $failed = 1;
		close(TMP);
		open(TMP, "<$config{CONFIG_DIR}/cert.pem") or $failed = 1;
		close(TMP);
		if ($failed) {
			print "SSL Certificates Not found, Generating.. \n\n
*************************************************************
* Generating the Private Key may take some time, go grab a  *
* Coffee. Even better, to generate some more entropy if it  *
* is taking a while, open another console and type du / a   *
* few times and get that HD going :) Then answer the        *
* Questions which follow. If you are unsure, just hit enter *
*************************************************************\n\n";
			$failed = make_gnutls_cert();
			if ($failed) {
				print "\n\033[1;32mCertificate generation failed!\033[0m\n\n";
			} else {
				print "\nCertificate generation complete, copying to config directory... ";
				system("mv key.pem $config{CONFIG_DIR}/key.pem");
				system("mv cert.pem $config{CONFIG_DIR}/cert.pem");
				print "Done.\n\n";
			}
		}
		else {
			print "SSL Certificates found, skipping.\n\n";
		}
	}
	else
	{
		print "Skipping SSL certificate generation\nin non-interactive mode.\n\n";
	}
} elsif ($config{USE_OPENSSL} eq "y") {
	$failed = 0;
	open(TMP, "<src/modules/m_ssl_openssl.cpp") or $failed = 1;
	close(TMP);
	if ($failed) {
		print "Symlinking src/modules/m_ssl_openssl.cpp from extra/\n";
		chdir("src/modules");
		system("ln -s extra/m_ssl_openssl.cpp");
		chdir("../..");
	}
	getmodules();
	$failed = 0;
	if ($interactive)
	{
		open(TMP, "<$config{CONFIG_DIR}/key.pem") or $failed = 1;
		close(TMP);
		open(TMP, "<$config{CONFIG_DIR}/cert.pem") or $failed = 1;
		close(TMP);
		if ($failed) {
			print "SSL Certificates Not found, Generating.. \n\n
*************************************************************
* Generating the certificates may take some time, go grab a *
* coffee, or something.	                                    *
*************************************************************\n\n";
			make_openssl_cert();
			print "\nCertificate generation complete, copying to config directory... ";
			system("mv key.pem $config{CONFIG_DIR}/key.pem");
			system("mv cert.pem $config{CONFIG_DIR}/cert.pem");
			system("mv dhparams.pem $config{CONFIG_DIR}/dhparams.pem");
			print "Done.\n\n";
		} else {
			print "SSL Certificates found, skipping.\n\n"
		}
	}
	else
	{
		print "Skipping SSL certificate generation\nin non-interactive mode.\n\n";
	}
}
if (($config{USE_GNUTLS} eq "n") && ($config{USE_OPENSSL} eq "n")) {
	print "Skipping SSL Certificate generation, SSL support is not available.\n\n";
}

getosflags();
writefiles(1);
makecache();

print "\n\n";
print "To build your server with these settings, please type '\033[1;32m$config{MAKEPROG}\033[0m' now.\n";
if (($config{USE_GNUTLS} eq "y") || ($config{USE_OPENSSL} eq "y")) {
	print "Please remember that to enable \033[1;32mSSL support\033[0m you must\n";
	print "load the required modules in your config. This configure process\n";
	print "has just prepared these modules to be compiled for you, and has not\n";
	print "configured them to be compiled into the core of the ircd.\n";
}
print "*** \033[1;32mRemember to edit your configuration files!!!\033[0m ***\n\n\n";
if (($config{OSNAME} eq "OpenBSD") && ($config{CC} ne "eg++")) {
	print "\033[1;32mWARNING!\033[0m You are running OpenBSD but you are using the base gcc package\nrather than eg++. This compile will most likely fail, but i'm letting you\ngo ahead with it anyway, just in case i'm wrong :-)\n";
}

if ($config{GCCVER} < "3") {
	print <<FOO2;
\033[1;32mWARNING!\033[0m You are attempting to compile InspIRCd on GCC 2.x!
GCC 2.x series compilers only had partial (read as broken) C++ support, and
your compile will most likely fail horribly! If you have any problems, do NOT
report them to the bugtracker or forums without first upgrading your compiler
to a newer 3.x or 4.x (or whatever is available currently) version.
FOO2
}

################################################################################
#			      HELPER FUNCTIONS				#
################################################################################
sub getcache {
	# Retrieves the .config.cache file, and loads values into the main config hash.
	open(CACHE, ".config.cache") or return 0;
	while (<CACHE>) {
		chomp;
		# Ignore Blank lines, and comments..
		next if /^\s*$/;
		next if /^\s*#/;
		my ($key, $value) = split("=", $_, 2);
		$value =~ /^\"(.*)\"$/;
		# Do something with data here!
		$config{$key} = $1;
	}
	close(CONFIG);
	return 1;
}

sub makecache {
	# Dump the contents of %config
	print "Writing \033[1;32mcache file\033[0m for future ./configures ...\n";
	open(FILEHANDLE, ">.config.cache");
	foreach $key (keys %config) {
		print FILEHANDLE "$key=\"$config{$key}\"\n";
	}
	close(FILEHANDLE);
}

sub dir_check {
	my ($desc, $hash_key) = @_;
	my $complete = 0;
	while (!$complete) {
		print "In what directory $desc?\n";
		print "[\033[1;32m$config{$hash_key}\033[0m] -> ";
		chomp($var = <STDIN>);
		if ($var eq "") {
			$var = $config{$hash_key};
		}
		if ($var =~ /^\~\/(.+)$/) {
			# Convert it to a full path..
			$var = resolve_directory($ENV{HOME} . "/" . $1);
		}
		elsif ((($config{OSNAME} =~ /MINGW32/i) and ($var !~ /^[A-Z]{1}:\\.*/)) and (substr($var,0,1) ne "/"))
		{
			# Assume relative Path was given.. fill in the rest.
			$var = $this . "/$var";
		}
		
		$var = resolve_directory($var); 
		if (! -e $var) {
			print "$var does not exist. Create it?\n[\033[1;32my\033[0m] ";
			chomp($tmp = <STDIN>);
			if (($tmp eq "") || ($tmp =~ /^y/i)) {
				# Attempt to Create the Dir..
				
				system("mkdir -p \"$var\" >> /dev/null 2>&1");
				$chk = system("mkdir -p \"$var\" >> /dev/null 2>&1") / 256;
				if ($chk != 0) {
					print "Unable to create directory. ($var)\n\n";
					# Restart Loop..
					next;
				}
			} else {
				# They said they don't want to create, and we can't install there.
				print "\n\n";
				next;
			}
		} else {
			if (!is_dir($var)) {
				# Target exists, but is not a directory.
				print "File $var exists, but is not a directory.\n\n";
				next;
			}
		}
		# Either Dir Exists, or was created fine.
		$config{$hash_key} = $var;
		$complete = 1;
		print "\n";
	}
}

sub getosflags {

	$config{LDLIBS} = "-lstdc++";
	$config{FLAGS}  = "-fno-strict-aliasing -fPIC -Wall -Woverloaded-virtual -Wno-deprecated $config{OPTIMISATI}";
	$config{DEVELOPER} = "-fno-strict-aliasing -fPIC -Wall -Woverloaded-virtual -Wno-deprecated -g";
	$SHARED = "-Wl,--rpath -Wl,$config{LIBRARY_DIR} -shared";
	$config{MAKEPROG} = "make";

	if ($config{OSNAME} =~ /darwin/i) {
		$config{FLAGS}  = "-DDARWIN -frtti -fPIC -Wall -Woverloaded-virtual -Wno-deprecated $config{OPTIMISATI}";
		$SHARED = "-bundle -twolevel_namespace -undefined dynamic_lookup";
		$config{LDLIBS} = "-ldl -lstdc++";
	}

	if ($config{OSNAME} =~ /OpenBSD/i) {
		$config{MAKEPROG} = "gmake";
		$config{LDLIBS} = $config{LDLIBS} . " -lunwind";
		chomp($foo = `eg++ -dumpversion | cut -c 1`);
		# theyre running the package version of gcc (eg++)... detect it and set up its version numbers.
		# if theyre not running this, configure lets the build continue but they probably wont manage to
		# compile as this standard version is 2.95.3!
		if ($foo ne "") {
			$config{CC} = "eg++";
			chomp($config{GCCVER}       = `eg++ -dumpversion | cut -c 1`); # we must redo these if we change the compiler path
		}
		return "OpenBSD";
	}

	if ($config{OSNAME} =~ /Linux/i) {
		$config{LDLIBS} = "-ldl -lstdc++";
		$config{FLAGS}  = "-fno-strict-aliasing -fPIC -Wall -Woverloaded-virtual -Wno-deprecated $config{OPTIMISATI}";
		$config{FLAGS}  .= " " . $ENV{CXXFLAGS} if exists($ENV{CXXFLAGS});
		$config{LDLIBS} .= " " . $ENV{LDLIBS} if exists($ENV{LDLIBS});
		$config{MAKEPROG} = "make";
	}

	if ($config{OSNAME} =~ /FreeBSD/i) {
		$config{FLAGS}  .= " " . $ENV{CXXFLAGS} if exists($ENV{CXXFLAGS});
		$config{LDLIBS} .= " " . $ENV{LDLIBS} if exists($ENV{LDLIBS});
	}

	if ($config{OSNAME} =~ /SunOS/i or $config{OSNAME} =~ /solaris/i)
	{
		# solaris/sunos needs these
		# socket = bsd sockets api
		# nsl = dns stuff
		# rt = POSIX realtime extensions
		# resolv = inet_aton only (why isnt this in nsl?!)
		$config{MAKEPROG} = "gmake";
		$config{LDLIBS} .= " -lsocket -lnsl -lrt -lresolv";
		return "Solaris";
	}
	
	if($config{OSNAME} =~ /MINGW32/i)
	{
		# All code is position-independent on windows
		$config{FLAGS} =~ s/-fPIC //;
		return "MinGW";
	}

	return $config{OSNAME};
}

sub writefiles {
	my($writeheader) = @_;
	# First File.. inspircd_config.h
	chomp(my $incos = `uname -n -s -r`);
	chomp($version = `sh src/version.sh`);
	chomp(my $revision2 = getrevision());
	if ($writeheader == 1)
	{
		print "Writing \033[1;32minspircd_config.h\033[0m\n";
		open(FILEHANDLE, ">include/inspircd_config.h");
		my $NL = $config{NICK_LENGT}+1;
		my $CL = $config{CHAN_LENGT}+1;
		print FILEHANDLE <<EOF;
/* Auto generated by configure, do not modify! */
#ifndef __CONFIGURATION_AUTO__
#define __CONFIGURATION_AUTO__

/* this is for windows support. */
#define CoreExport /**/
#define DllExport /**/

#define CONFIG_FILE "$config{CONFIG_DIR}/inspircd.conf"
#define MOD_PATH "$config{MODULE_DIR}"
#define VERSION "$version"
#define REVISION "$revision2"
#define MAXCLIENTS $config{MAX_CLIENT}
#define MAXCLIENTS_S "$config{MAX_CLIENT}"
#define SOMAXCONN_S "$config{_SOMAXCONN}"
#define MAX_DESCRIPTORS $config{MAX_DESCRIPTORS}
#define NICKMAX $NL
#define CHANMAX $CL
#define MAXMODES $config{MAXI_MODES}
#define IDENTMAX $config{MAX_IDENT}
#define MAXQUIT $config{MAX_QUIT}
#define MAXTOPIC $config{MAX_TOPIC}
#define MAXKICK $config{MAX_KICK}
#define MAXGECOS $config{MAX_GECOS}
#define MAXAWAY $config{MAX_AWAY}
#define OPTIMISATION $config{OPTIMITEMP}
#define LIBRARYDIR "$config{LIBRARY_DIR}"
#define SYSTEM "$incos"
EOF
print FILEHANDLE "#define MAXBUF " . ($config{MAXBUF}+2) . "\n";

		if ($config{OSNAME} =~ /SunOS/i) {
			print FILEHANDLE "#define IS_SOLARIS\n";
		}
		if ($config{OSNAME} =~ /MINGW32/i) {
			print FILEHANDLE "#define IS_MINGW\n";
		}
		if ($config{GCCVER} >= 3) {
			print FILEHANDLE "#define GCC3\n";
		}
		if ($config{HAS_STRLCPY} eq "true") {
			print FILEHANDLE "#define HAS_STRLCPY\n";
		}
		if ($config{HAS_STDINT} eq "true") {
			print FILEHANDLE "#define HAS_STDINT\n";
		}
		if ($config{IPV6} =~ /y/i) {
			print FILEHANDLE "#define IPV6\n";
		}
		if ($config{SUPPORT_IP6LINKS} =~ /y/i) {
			print FILEHANDLE "#define SUPPORT_IP6LINKS\n";
		}
		my $use_hiperf = 0;
		if (($has_kqueue) && ($config{USE_KQUEUE} eq "y")) {
			print FILEHANDLE "#define USE_KQUEUE\n";
			$se = "socketengine_kqueue";
			$use_hiperf = 1;
		}
		if (($has_epoll) && ($config{USE_EPOLL} eq "y")) {
			print FILEHANDLE "#define USE_EPOLL\n";
			$se = "socketengine_epoll";
			$use_hiperf = 1;
		}
		if (($has_ports) && ($config{USE_PORTS} eq "y")) {
			print FILEHANDLE "#define USE_PORTS\n";
			$se = "socketengine_ports";
			$use_hiperf = 1;
		}
		# user didn't choose either epoll or select for their OS.
		# default them to USE_SELECT (ewwy puke puke)
		if (!$use_hiperf) {
			print FILEHANDLE "#define USE_SELECT\n";
			$se = "socketengine_select";
		}
		print FILEHANDLE "\n#endif\n";
		close(FILEHANDLE);
	}

	if ($writeheader)
	{
		open(FILEHANDLE, ">include/inspircd_se_config.h");
		print FILEHANDLE <<EOF;
/* Auto generated by configure, do not modify or commit to svn! */
#ifndef __CONFIGURATION_SOCKETENGINE__
#define __CONFIGURATION_SOCKETENGINE__

#include "$se.h"

#endif
EOF
		close(FILEHANDLE);
	}


	# Create a Modules List..
	my $modules = "";
	foreach $i (@modlist)
	{
		$modules .= "m_".$i.".so ";
	}
	chomp($modules);   # Remove Redundant whitespace..

	opendir(DIRHANDLE, "src/modules");
	foreach $name (sort readdir(DIRHANDLE)) {
		if ($name =~ /^m_(.+?)$/) {
			if (opendir(MDIRHANDLE, "src/modules/$name") != 0) {
				closedir(MDIRHANDLE);
				$modules .= "$name.so ";
			}
		}
	}
	closedir(DIRHANDLE);


	# Write all .in files.
	my $tmp = "";
	my $file = "";
	my $exe = "inspircd";

	opendir(DIRHANDLE, $this);

	# Do this once here, and cache it in the .*.inc files,
	# rather than attempting to read src/version.sh from
	# compiled code -- we might not have the source to hand.
	# Fix for bug#177 by Brain.

	chomp(my $version = `sh ./src/version.sh`);
	chomp(my $revision = getrevision());
	$version = "$version(r$revision)";

	my $LIBEXT = "so";
	if ($config{IS_DARWIN} eq "YES")
	{
		$LIBEXT = "dylib";
	}
	# We can actually parse any file starting with . and ending with .inc,
	# but right now we only parse .inspircd.inc to form './inspircd'

	foreach $name (sort readdir(DIRHANDLE)) {
		if ($name =~ /^\.(.+)\.inc$/) {
			$file = $1;

			# Bug #353, omit this on non-darwin
			next if (($config{OSNAME} !~ /darwin/) && ($file eq "org.inspircd.plist"));

			# All .name.inc files need parsing!
			$tmp = "";
			open(FILEHANDLE, ".$file.inc");
			while (<FILEHANDLE>) {
				$tmp .= $_;
			}
			close(FILEHANDLE);

			$tmp =~ s/\@CC\@/$config{CC}/;
			$tmp =~ s/\@MAKEPROG\@/$config{MAKEPROG}/;
			$tmp =~ s/\@FLAGS\@/$config{FLAGS}/;
			$tmp =~ s/\@DEVELOPER\@/$config{DEVELOPER}/;
			$tmp =~ s/\@LDLIBS\@/$config{LDLIBS}/;
			$tmp =~ s/\@BASE_DIR\@/$config{BASE_DIR}/;
			$tmp =~ s/\@CONFIG_DIR\@/$config{CONFIG_DIR}/;
			$tmp =~ s/\@MODULE_DIR\@/$config{MODULE_DIR}/;
			$tmp =~ s/\@BINARY_DIR\@/$config{BINARY_DIR}/;
			$tmp =~ s/\@LIBRARY_DIR\@/$config{LIBRARY_DIR}/;
			$tmp =~ s/\@LIBRARY_EXT\@/$LIBEXT/;
			$tmp =~ s/\@MODULES\@/$modules/;
			$tmp =~ s/\@STARTSCRIPT\@/$config{STARTSCRIPT}/;
			$tmp =~ s/\@DESTINATION\@/$config{DESTINATION}/;
			$tmp =~ s/\@EXTRA_DIR\@/$config{EXTRA_DIR}/;
			$tmp =~ s/\@EXECUTABLE\@/$exe/;
			$tmp =~ s/\@MAKEORDER\@/$config{MAKEORDER}/;
			$tmp =~ s/\@VERSION\@/$version/;

			print "Writing \033[1;32m$file\033[0m\n";
			open(FILEHANDLE, ">$file");
			print FILEHANDLE $tmp;
		}
	}
	closedir(DIRHANDLE);

	# Make inspircd executable!
	chmod 0744, 'inspircd';

	print "Writing dynamic-build \033[1;32msrc/Makefile\033[0m\n";
	write_dynamic_makefile();
	write_dynamic_modules_makefile();
}

sub write_dynamic_modules_makefile {
	# Modules Makefile..
	print "Writing \033[1;32msrc/modules/Makefile\033[0m\n";
	open(FILEHANDLE, ">src/modules/Makefile");

###
# Module Makefile Header
###
	print FILEHANDLE <<EOF;
###################################################
# Copyright 2002-2007 The InspIRCd Development Team
#  http://www.inspircd.org/wiki/index.php/Credits
#
# Thanks to Andrew Church <achurch\@achurch.org>
#   for assisting with making this work right.
#
# Automatically Generated by ./configure to add a
#  modules please run ./configure -modupdate
###################################################

all: \$(MODULES)

EOF

if ($config{OSNAME} =~ /darwin/) {
		print FILEHANDLE <<EOCHEESE;

PICLDFLAGS = -twolevel_namespace -undefined dynamic_lookup \$(FLAGS) -bundle

EOCHEESE
} else {
		print FILEHANDLE <<EOCHEESE;

PICLDFLAGS = -fPIC -DPIC -shared \$(FLAGS)

EOCHEESE
}

	###
	# End Module Makefile Header
	###

	# Create a Modules List..
	my $modules = "";
	my $cmflags = "";
	my $liflags = "";
	my $crud = "";

	foreach $i (@modlist) {
		###
		# Write Entry to the MakeFile
		###
		$cmflags = getcompilerflags("src/modules/m_".$i.".cpp");
		$liflags = getlinkerflags("src/modules/m_".$i.".cpp");
		$deps = getdependencies("src/modules/m_".$i.".cpp");
	
		#print "file: $i: cmflags=$cmflags; liflags=$liflags; deps=$deps\n";
	
		print FILEHANDLE <<EOCHEESE;
m_$i.so: m_$i.cpp ../../include/modules.h ../../include/users.h ../../include/channels.h ../../include/base.h ../../include/inspircd_config.h ../../include/inspircd.h ../../include/configreader.h $deps
	\$(CC) -pipe -I../../include \$(FLAGS) $cmflags \$(PICLDFLAGS) $liflags -export-dynamic -o m_$i.so m_$i.cpp
EOCHEESE
		$crud = $crud . "	install -m \$(INSTMODE) m_$i.so \$(MODPATH)\n";
###
		# End Write Entry to the MakeFile
		###
	}

	opendir(DIRHANDLE, "src/modules");
	foreach $name (sort readdir(DIRHANDLE)) {
		if ($name =~ /^m_(.+?)$/) {
			$mfrules = "";
			$mobjs = "";
			$mliflags = "";
			$mfcount = 0;
			# A module made of multiple files, in a dir, e.g. src/modules/m_spanningtree/
			if (opendir(MDIRHANDLE, "src/modules/$name") != 0) {
				read_module_directory("src/modules/$name", $name);
				print "Composing Makefile rules for directory \033[1;32m$name\033[0m... (\033[1;32m$mfcount files found\033[0m)\n";
				print FILEHANDLE "$name.so: ../../include/modules.h ../../include/users.h ../../include/channels.h ../../include/base.h ../../include/inspircd_config.h ../../include/inspircd.h ../../include/configreader.h $mobjs\n"; 
				if ($config{IS_DARWIN} eq "YES") {
					print FILEHANDLE "	\$(CC) -pipe -twolevel_namespace -undefined dynamic_lookup \$(FLAGS) $mliflags -bundle -o $name.so $mobjs\n"; 
				} else {
					print FILEHANDLE "	\$(CC) -pipe \$(FLAGS) -shared $mliflags -o $name.so $mobjs\n";
				}
				print FILEHANDLE "\n$mfrules\n";
				closedir(MDIRHANDLE);
				$crud = $crud . "	install -m \$(INSTMODE) $name.so \$(MODPATH)\n";
			}
		}
	}
	closedir(DIRHANDLE);

	print FILEHANDLE "modinst:\n	\@echo \"Installing modules...\"\n" . $crud;
}

sub read_module_directory {
	my ($dpath, $reldpath) = @_;
	
	if (opendir(MDIRHANDLE, $dpath) == 0) {
		return;
	}
	
	foreach $fname (sort readdir(MDIRHANDLE)) {
		if ($fname =~ /\.cpp$/) {
			$cmflags = getcompilerflags("$dpath/$fname");
			$mliflags = $mliflags . " " . getlinkerflags("$dpath/$fname");
			$deps = getdependencies("$dpath/$fname");
			$oname = $fname;
			$oname =~ s/\.cpp$/.o/g;
			$mfrules = $mfrules .  "$reldpath/$oname: $reldpath/$fname ../../include/modules.h ../../include/users.h ../../include/channels.h ../../include/base.h ../../include/inspircd_config.h ../../include/inspircd.h ../../include/configreader.h $deps\n";
			$mfrules = $mfrules .  "	\$(CC) -pipe -I../../include -I. \$(FLAGS) $cmflags -export-dynamic -o $reldpath/$oname -c $reldpath/$fname\n\n";
			$mobjs = $mobjs . " $reldpath/$oname";
			$mfcount++;
		}
		elsif ((-d "$dpath/$fname") && !($fname eq ".") && !($fname eq "..")) {
			read_module_directory($dpath."/".$fname, $reldpath."/".$fname);
		}
	}
}

sub calcdeps($)
{
	# Yes i know we could use gcc -M but it seems to ideneify a lot of 'deep'
	# dependencies which are not relevent in C++.

	my $file = $_[0];

	open (CPP, "<$file") or die("Can't open $file for reading!");

	my %dupe = ();
	my $retlist = "";

	foreach my $d (@ignoredeps)
	{
		$dupe{$d} = 1;
	}

	my $immutable = "";
	foreach my $dep (@immutabledeps)
	{
		$immutable = $immutable . "../include/$dep ";
	}
	$immutable =~ s/ $//g;

	while (chomp($line = <CPP>))
	{
		if ($line =~ /#include "(.+\.h)"/)
		{
			if (!exists($dupe{$1}))
			{
				$retlist = $retlist . "../include/$1 ";
				$dupe{$1} = 1;
			}
		}
	}
	close CPP;
	return length($immutable) ? $immutable . " " . $retlist : $retlist;
}

sub write_dynamic_makefile
{
	my $i = 0;
	my @cmdlist = ();
	opendir(DIRHANDLE, "src/commands");
	foreach $name (sort readdir(DIRHANDLE))
	{
		if ($name =~ /^cmd_(.+)\.cpp$/)
		{
			$cmdlist[$i++] = $1;
	    	}
	}
	closedir(DIRHANDLE);

	if (!$has_epoll)
	{
		$config{USE_EPOLL} = 0;
	}
	if (!$has_kqueue)
	{
		$config{USE_KQUEUE} = 0;
	}
	if (!$has_ports)
	{
		$config{USE_PORTS} = 0;
	}

	print "Scanning src folder for core files";
	opendir(DIRHANDLE, "src");
	foreach $name (sort readdir(DIRHANDLE))
	{
		if ($name =~ /\.cpp$/)
		{
			open (CPP, "<src/$name") or die("Can't open src/$name to scan it! oh bugger");
			while (chomp($line = <CPP>))
			{
				if ($line =~ /\/\* \$Core: (\w+) \*\//i)
				{
					$filelist{$name} = $1;
					print ".";
				}
				elsif ($line =~ /\/\* \$ExtraDeps: (.*?) \*\//i)
				{
					$specialdeps{$name} = $1;
				}
				elsif ($line =~ /\/\* \$ExtraObjects: (.*?) \*\//i)
				{
					$extraobjects{$name} = $1;
				}
				elsif ($line =~ /\/\* \$ExtraBuild: (.*?) \*\//i)
				{
					$extrabuildlines{$name} = $1;
				}
				elsif ($line =~ /\/\* \$ExtraSources: (.*?) \*\//i)
				{
					$extrasources{$name} = $1;
				}
				elsif ($line =~ /\/\* \$If: (\w+) \*\//i)
				{
					if (($config{$1} !~ /y/i) and ($config{$1} ne "1"))
					{
						# Skip to 'endif'
						while (chomp($line = <CPP>))
						{
							die ("\$If buildsystem instruction within another \$If in file src/$name") if ($line =~ /\/\* \$If: (\w+) \*\//i);
							last if ($line =~ /\/\* \$EndIf \*\//i);
						}
					}
				}
			}
			close CPP;
		}
	}
	closedir(DIRHANDLE);
	print " done!\n";

	$freebsd4libs = $config{CRAQ};

	my $all = "all: ";
	$all_libsonly = "";

	if ($config{IS_DARWIN} eq "YES")
	{
		$libraryext = "dylib";
		$othercrap = "	\$(CC) -pipe -I../include \$(FLAGS) -export-dynamic -c inspircd.cpp\n	\$(CC) -pipe -dynamic -bind_at_load -L. -o inspircd \$(LDLIBS) inspircd.o "
	}
	else
	{
		$libraryext = "so";
		$othercrap = "	\$(CC) -pipe -I../include -Wl,--rpath -Wl,$config{LIBRARY_DIR} \$(FLAGS) $freebsd4libs -rdynamic -L. inspircd.cpp -o inspircd \$(LDLIBS) ";
	}

	foreach my $cpp (sort keys %filelist)
	{
		$all = $all . $filelist{$cpp} . "." . $libraryext . " ";
		$all_libsonly = $all_libsonly . $filelist{$cpp} . "." . $libraryext . " ";
	}
	$all = $all . "moo inspircd\n";

	$othercrap = $othercrap . " $all_libsonly\n\n";

	open(FH,">src/Makefile") or die("Could not write src/Makefile");
	print FH <<EOM;

CC = im a cheezeball
CXXFLAGS = -I../include \${FLAGS}
CPPFILES = \$(shell /bin/ls -l modes/ | grep '\\.cpp' | sed 's/^.* //' | grep -v svn)
RELCPPFILES = \$(shell /bin/ls -l modes/ | grep '\\.cpp' | sed 's/^.* /modes\\//' | grep -v svn)

EOM

	print FH "$all\n\n";

	$deps = calcdeps("src/inspircd.cpp");
	print FH "inspircd: inspircd.cpp $deps $all_libsonly\n";
	print FH "$othercrap\n";

	foreach my $cpp (sort keys %filelist)
	{
		my $thislib = $filelist{$cpp} . "." . $libraryext; 
		my $objs = $cpp;
		my $rawcpp = $cpp;
		$objs =~ s/\.cpp$/.o/;
		if (exists($extraobjects{$cpp}))
		{
			$objs = $objs . " " . $extraobjects{$cpp};
		}
		if (exists($extrasources{$cpp}))
		{
			$rawcpp = $rawcpp . " " . $extrasources{$cpp};
		}
		if ($config{IS_DARWIN} eq "YES")
		{
			$libcrap = "-install_name " . $config{LIBRARY_DIR} . "/" . $thislib . " -dynamiclib -twolevel_namespace -undefined dynamic_lookup";
		}
		else
		{
			$libcrap = "-Wl,--rpath -Wl," . $config{LIBRARY_DIR} . " -shared";
		}
		$deps = calcdeps("src/$cpp");
		if (exists($extrasources{$cpp}))
		{
			foreach my $seperate (sort split(' ',$extrasources{$cpp}))
			{
				$d = calcdeps("src/$extrasources{$cpp}") . " ";
				if ($d ne "")
				{
					$deps = $deps . $d . " ";
				}
			}
		}
		print FH $thislib . ": $cpp $deps ". $specialdeps{$cpp} . "\n";
		print FH "	\$(CC) -pipe -I../include \$(FLAGS) -export-dynamic -c $rawcpp\n";
		if (exists($extrabuildlines{$cpp}))
		{
			print FH "	" . $extrabuildlines{$cpp} . "\n";
		}
		print FH "	\$(CC) -pipe $libcrap -o " . $thislib . " " . $objs . "\n\n";
	}

	print FH "moo:\n	\${MAKE} -C \"commands\" DIRNAME=\"src/commands\" CC=\"\$(CC)\" \$(MAKEARGS)\n\n";

	# close main makefile
	close(FH);

	# generate a list of .so
	foreach my $cmd (@cmdlist) {
		$cmdobjs = $cmdobjs . "cmd_$cmd.so ";
	}

	# and now reopen the commands makefile
	open(FH,">src/commands/Makefile") or die("Could not write src/commands/Makefile");
	print FH <<ITEM;
CC = i am cornholio
CXXFLAGS = -I../../include ${FLAGS}

all: $cmdobjs


ITEM

	# now print the command file details.
	foreach my $cmd (@cmdlist) {
		print FH <<ITEM;
cmd_$cmd.so: cmd_$cmd.cpp ../../include/base.h ../../include/modules.h ../../include/inspircd.h ../../include/channels.h ../../include/users.h ../../include/globals.h ../../include/inspircd_config.h ../../include/commands/cmd_$cmd.h
	\$(CC) -pipe -I../../include \$(FLAGS) -export-dynamic -c cmd_$cmd.cpp
	\$(CC) -pipe $SHARED -o cmd_$cmd.so cmd_$cmd.o

ITEM
	}
#try build a .so, no intermediate .o
#	\$(CC) -pipe -I../../include \$(FLAGS) -export-dynamic $SHARED -o cmd_$cmd.so

#this works for sure
#	\$(CC) -pipe -I../../include \$(FLAGS) -export-dynamic -c cmd_$cmd.cpp
#	\$(CC) -pipe $SHARED -o cmd_$cmd.so cmd_$cmd.o
}