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configure
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	#!/usr/bin/perl -w

	use warnings;
	use Getopt::Long;
	use Cwd 'abs_path';
	use File::Basename;

	print "\nConfiguring Makefiles for your system...\n";

	# Set a bunch of variables

	my @invoke = @ARGV;

	my $ret = 0;

	my %options = (
	help => \$help,
	cc => \$cc,
	debug => \$debug,
	cflags => \$cflags,
	extracflags => \$extracflags,
	ldflags => \$ldflags,
	extraldflags => \$extraldflags,
	objdir => \$objdir,
	incdir => \$incdir,
	libdir => \$libdir,
	ccsincdir => \$ccsincdir,
	ccslibdir => \$ccslibdir,
	cmanincdir => \$cmanincdir,
	cmanlibdir => \$cmanlibdir,
	logtincdir => \$logtincdir,
	logtlibdir => \$logtlibdir,
	openaisincdir => \$openaisincdir,
	openaislibdir => \$openaislibdir,
	virtincdir => \$virtincdir,
	virtlibdir => \$virtlibdir,
	nssincdir => \$nssincdir,
	nsslibdir => \$nsslibdir,
	nsprincdir => \$nsprincdir,
	nsprlibdir => \$nsprlibdir,
	mandir => \$mandir,
	prefix => \$prefix,
	sbindir => \$sbindir,
	initddir => \$initddir,
	docdir => \$docdir,
	logdir => \$logdir,
	syslogfacility => \$syslogfacility,
	sysloglevel => \$sysloglevel,
	snmpbin => \$snmpbin,
	confdir => \$confdir,
	fence_agents => \$fence_agents,
	fenceagentslibdir => \$fenceagentslibdir,
	enable_crack_of_the_day => \$enable_crack_of_the_day,
	enable_legacy_code => \$enable_legacy_code,
	enable_virt => \$enable_virt,
	release_version => \$release_version,
	);

	my $err = &GetOptions (\%options,
	'help',
	'cc=s',
	'debug',
	'cflags=s',
	'extracflags=s',
	'ldflags=s',
	'extraldflags=s',
	'objdir=s',
	'incdir=s',
	'libdir=s',
	'ccsincdir=s',
	'ccslibdir=s',
	'cmanincdir=s',
	'cmanlibdir=s',
	'logtincdir=s',
	'logtlibdir=s',
	'openaisincdir=s',
	'openaislibdir=s',
	'virtincdir=s',
	'virtlibdir=s',
	'nssincdir=s',
	'nsslibdir=s',
	'nsprincdir=s',
	'nsprlibdir=s',
	'mandir=s',
	'prefix=s',
	'sbindir=s',
	'initddir=s',
	'docdir=s',
	'logdir=s',
	'syslogfacility=s',
	'sysloglevel=s',
	'snmpbin=s',
	'confdir=s',
	'release_version=s',
	'fence_agents=s',
	'fenceagentslibdir=s',
	'enable_crack_of_the_day',
	'enable_legacy_code',
	'enable_virt');

	if(!$err) {
	$ret = 1;
	print "* ERROR: Invalid option detected *\n";
	}

	# Check for the --help flag
	if ($help \|\| !$err) {
	$_ = $0;
	s/.\.\/(.)/$1/;
	print "Usage: $_ [flags]\n";
	print "--help\t\tPrints this usage information\n\n";
	print "install flags:\n";
	print "--prefix=\tthe base directory to install into. (Default: /usr)\n";
	print "--sbindir=\tthe base directory for system binaries. (Default: {prefix}/sbin)\n";
	print "--initddir=\tthe base directory for init.d scripts. (Default: /etc/init.d)\n";
	print "--libdir=\tthe base directory for libraries. (Default: {prefix}/lib)\n";
	print "--docdir=\tthe base directory for misc cluster documentation files. (Default: {prefix}/share/doc/cluster)\n";
	print "--logdir=\tthe base directory for cluster logging files. (Default: /var/log/cluster/)\n";
	print "--syslogfacility=\tset the default syslog facility. (Default: LOG_LOCAL4)\n";
	print "--sysloglevel=\tset the default syslog level. (Default: LOG_INFO)\n";
	print "--snmpbin=\tthe base directory for snmp binaries (Ex: /usr/bin/snmpwalk). (Default: {prefix}/bin)\n";
	print "--confdir=\tthe cluster config directory. (Default: /etc/cluster)\n";
	print "--mandir=\tthe base directory for man pages. (Default: {prefix}/share/man)\n";
	print "\nbuild flags:\n";
	print "--cc=\t\tcompiler to use. (Default: gcc)\n";
	print "--debug\t\tEnable debugging build. Changes default CFLAGS to -Wall -O0 -DDEBUG -g.\n";
	print "--cflags=\toverride default CFLAGS settings. (Default: -Wall -O2 -g)\n";
	print "--extracflags=\tadd extra compiler options to default CFLAGS setting. (Default: none)\n";
	print "--ldflags=\toverride default LDFLAGS settings. (Default: none)\n";
	print "--extraldflags=\tadd extra linking options to default LDFLAGS settings. (Default: none)\n";
	print "--objdir=\tspecify directory where to store object files. (Defaults: current build dir)\n";
	print "--incdir=\tthe base directory for include files. (Default: {prefix}/include)\n";
	print "--ccsincdir=\tthe base directory for ccs include files. (Default: ./config/libs/libccsconfdb)\n";
	print "--ccslibdir=\tthe base directory for ccs libraries. (Default: ./config/libs/libccsconfdb)\n";
	print "--cmanincdir=\tthe base directory for cman include files. (Default: ./cman/lib)\n";
	print "--cmanlibdir=\tthe base directory for cman libraries. (Default: ./cman/lib)\n";
	print "--logtincdir=\tthe base directory for logthread include files. (Default: ./common/liblogthread)\n";
	print "--logtlibdir=\tthe base directory for logthread libraries. (Default: ./common/liblogthread)\n";
	print "--openaisincdir=\tthe base directory for openais include files. (Default: {incdir})\n";
	print "--openaislibdir=\tthe base directory for openais libraries. (Default: {libdir}/openais)\n";
	print "--nssincdir=\tthe base directory for libnss include files. (Default: {incdir}/nss3)\n";
	print "--nsslibdir=\tthe base directory for libnss libraries. (Default: {libdir})\n";
	print "--nsprincdir=\tthe base directory for libnspr include files. (Default: {incdir}/nspr4)\n";
	print "--nsprlibdir=\tthe base directory for libnspr libraries. (Default: {libdir})\n";
	print "--virtincdir=\tthe base directory for libvirt include files. (Default: {incdir}/libvirt)\n";
	print "--virtlibdir=\tthe base directory for libvirt libraries. (Default: {libdir})\n";
	print "--fence_agents=\tlist of fence agents to configure. (Default: all)\n";
	print "\t\tUse --fence_agents=help for a list\n";
	print "--fenceagentslibdir=\tspecify directory where to install common fence python lib. (Default: /usr/share/fence)\n";
	print "--enable_crack_of_the_day\tEnable build of highly experimental features that rely on code that is not yet available for general use. (Default: no)\n";
	print "--enable_legacy_code\tEnable build of old/obsolete/unsupported code/tools. (Default: no)\n";
	print "--enable_virt\tEnable building of virtualization code (Default: disabled)\n";
	exit $ret;
	}

	sub symlinks {
	my $dir = shift;
	my $pattern = shift;
	@args = "find $dir -type f -name $pattern";
	open (IFILE, "@args \|");
	while (<IFILE>) {
	chomp;
	s\|\./\|\|g;
	s\|.*make\/defines.mk\|\|g;
	$dirname = dirname($_);
	$filename = basename($_);
	system("mkdir -p $objdir/$dirname");
	symlink("${cdir}/$_","$objdir/$dirname/$filename");
	}
	close IFILE;
	return 0;
	}

	$pwd = `pwd`;
	chomp($pwd);

	if (!$cc) {
	$cc="gcc";
	}
	if (!$cflags) {
	$cflags="-Wall -Wformat=2 -MMD";
	if (!$debug) {
	$cflags="${cflags} -O2";
	} else {
	$cflags="${cflags} -O0 -DDEBUG";
	}
	$cflags="${cflags} -g";
	}
	if ($extracflags) {
	$cflags="${cflags} ${extracflags}";
	}
	if (!$ldflags) {
	$ldflags="";
	}
	if ($extraldflags) {
	$ldflags="${ldflags} ${extraldflags}";
	}
	if (!$prefix) {
	$prefix="/usr";
	}

	print "\nChecking tree: ";
	if (!$objdir) {
	$objdir="${pwd}";
	}
	$objdir = abs_path( $objdir );
	$cdir = dirname ( abs_path( $0 ) );
	unless ("$cdir" eq "$objdir") {
	chdir "$cdir";
	}

	if (! -d "$objdir/make") {
	print "setting up $objdir\n";
	mkdir "$objdir";
	symlinks(".","Makefile");
	symlinks(".","*.mk");
	} else {
	print "nothing to do\n";
	}

	if (!$incdir) {
	$incdir="${prefix}/include";
	}
	if (!$libdir) {
	$libdir="${prefix}/lib";
	}
	if (!$ccsincdir) {
	$ccsincdir="${incdir}";
	}
	if (!$ccslibdir) {
	$ccslibdir="${libdir}";
	}
	if (!$cmanincdir) {
	$cmanincdir="${incdir}";
	}
	if (!$cmanlibdir) {
	$cmanlibdir="${libdir}";
	}
	if (!$logtincdir) {
	$logtincdir="${incdir}";
	}
	if (!$logtlibdir) {
	$logtlibdir="${libdir}";
	}
	if (!$openaisincdir) {
	$openaisincdir="${incdir}";
	}
	if (!$openaislibdir) {
	$openaislibdir="${libdir}/openais";
	}
	if (!$nssincdir) {
	$nssincdir="${incdir}/nss3";
	}
	if (!$nsslibdir) {
	$nsslibdir="${libdir}";
	}
	if (!$nsprincdir) {
	$nsprincdir="${incdir}/nspr4";
	}
	if (!$nsprlibdir) {
	$nsprlibdir="${libdir}";
	}
	if (!$virtincdir) {
	$virtincdir="${incdir}/libvirt";
	}
	if (!$virtlibdir) {
	$virtlibdir="${libdir}";
	}
	if (!$mandir) {
	$mandir="${prefix}/share/man";
	}
	if (!$sbindir) {
	$sbindir="${prefix}/sbin";
	}
	if (!$initddir) {
	$initddir="/etc/init.d";
	}
	if (!$docdir) {
	$docdir="${prefix}/share/doc/cluster";
	}
	if (!$logdir) {
	$logdir="/var/log/cluster";
	}
	if (!$syslogfacility) {
	$syslogfacility="LOG_LOCAL4";
	}
	if (!$sysloglevel) {
	$sysloglevel="LOG_INFO";
	}
	if (!$snmpbin) {
	$snmpbin="${prefix}/bin";
	}
	if (!$confdir) {
	$confdir="/etc/cluster";
	}
	if (!$fence_agents) {
	$fence_agents="all";
	}
	if (!$fenceagentslibdir) {
	$fenceagentslibdir="/usr/share/fence";
	}
	if (!$enable_crack_of_the_day) {
	$enable_crack_of_the_day="";
	} else {
	print "\n********************************************************************************************\n";
	print "WARNING: you have explicitly enabled all possible experimental features under development!\n";
	print " This code will have no mercy for your data and your machines. You have been warned!\n";
	print "\n********************************************************************************************\n";
	$cflags="${cflags} -DEXPERIMENTAL_BUILD";
	}
	if (!$enable_legacy_code) {
	$enable_legacy_code="";
	} else {
	print "\n********************************************************************************************\n";
	print "WARNING: you have explicitly enabled the build of old/obsoleted/unsupported code/tools\n";
	print " This code is provided only for backward compatibility\n";
	print "\n********************************************************************************************\n";
	$cflags="${cflags} -DLEGACY_CODE";
	}
	if (!$enable_virt) {
	$enable_virt="";
	}
	if (defined($release_version) && not length $release_version) {
	$release_version="";
	}

	if ((!$fence_agents) \|\| ($fence_agents eq "all") \|\| ($fence_agents eq "help")) {
	@args = "find fence/agents -mindepth 2 -maxdepth 2 -name Makefile -printf '%h'";
	open (IFILE, "@args \|");
	while (<IFILE>) {
	chomp;
	s\|fence\/agents\/\| \|g;
	s\|lib \|\|g;
	$all_fence = $_;
	}
	close IFILE;
	}

	if ($fence_agents eq "help") {
	print "Available fence agents:\n$all_fence\n";
	exit 0;
	}

	if ((!$fence_agents) \|\| ($fence_agents eq "all")) {
	print "\nThe following fence agents will be build on this system:\n$all_fence\n";
	print "\nNOTE: xvm will build only if --enable_virt has been specified\n\n";
	$fence_agents = $all_fence
	}

	open IFILE, "<make/defines.mk.input" or die "Can't redirect stdin";
	open OFILE, ">${objdir}/make/defines.mk" or die "Can't redirect stdout";

	print OFILE "# This file was generated by configure from defines.mk.input\n";

	while (<IFILE>) {
	chomp;
	$_ =~ s/\@SRCDIR\@/$cdir/;
	$_ =~ s/\@CC\@/$cc/;
	$_ =~ s/\@CFLAGS\@/$cflags/;
	$_ =~ s/\@LDFLAGS\@/$ldflags/;
	$_ =~ s/\@OBJDIR\@/$objdir/;
	$_ =~ s/\@INCDIR\@/$incdir/;
	$_ =~ s/\@LIBDIR\@/$libdir/;
	$_ =~ s/\@CCSINCDIR\@/$ccsincdir/;
	$_ =~ s/\@CCSLIBDIR\@/$ccslibdir/;
	$_ =~ s/\@CMANINCDIR\@/$cmanincdir/;
	$_ =~ s/\@CMANLIBDIR\@/$cmanlibdir/;
	$_ =~ s/\@LOGTINCDIR\@/$logtincdir/;
	$_ =~ s/\@LOGTLIBDIR\@/$logtlibdir/;
	$_ =~ s/\@OPENAISINCDIR\@/$openaisincdir/;
	$_ =~ s/\@OPENAISLIBDIR\@/$openaislibdir/;
	$_ =~ s/\@NSSINCDIR\@/$nssincdir/;
	$_ =~ s/\@NSSLIBDIR\@/$nsslibdir/;
	$_ =~ s/\@NSPRINCDIR\@/$nsprincdir/;
	$_ =~ s/\@NSPRLIBDIR\@/$nsprlibdir/;
	$_ =~ s/\@VIRTINCDIR\@/$virtincdir/;
	$_ =~ s/\@VIRTLIBDIR\@/$virtlibdir/;
	$_ =~ s/\@MANDIR\@/$mandir/;
	$_ =~ s/\@SBINDIR\@/$sbindir/;
	$_ =~ s/\@INITDDIR\@/$initddir/;
	$_ =~ s/\@CONFDIR\@/$confdir/;
	$_ =~ s/\@DOCDIR\@/$docdir/;
	$_ =~ s/\@LOGDIR\@/$logdir/;
	$_ =~ s/\@SYSLOGFACILITY\@/$syslogfacility/;
	$_ =~ s/\@SYSLOGLEVEL\@/$sysloglevel/;
	$_ =~ s/\@SNMPBIN\@/$snmpbin/;
	$_ =~ s/\@FENCE_AGENTS\@/$fence_agents/;
	$_ =~ s/\@FENCEAGENTSLIBDIR\@/$fenceagentslibdir/;
	$_ =~ s/\@ENABLE_CRACK_OF_THE_DAY\@/$enable_crack_of_the_day/;
	$_ =~ s/\@ENABLE_LEGACY_CODE\@/$enable_legacy_code/;
	$_ =~ s/\@ENABLE_VIRT\@/$enable_virt/;

	print OFILE "$_\n";
	}

	close IFILE;

	if (not defined($release_version)) {

	my $current_version;
	if ( -f 'make/official_release_version' ) {
	open OFFICIAL_VERSION, '<', "make/official_release_version";
	while (<OFFICIAL_VERSION>) {
	if ($_ =~ /VERSION/) {
	$current_version = $_;
	}
	}
	close OFFICIAL_VERSION;
	}

	if (not defined($release_version)) {
	if (not defined($current_version)) {
	$release_version = `date +%s`;
	chomp $release_version;
	} else {
	$release_version = $current_version;
	$release_version =~ s/."(.)"\n/$1/;
	}
	}
	}

	print OFILE "RELEASE_VERSION = $release_version\n";
	print OFILE "CFLAGS += -DRELEASE_VERSION=\\\"$release_version\\\"\n";

	close OFILE;

	open OFILE, ">${objdir}/.configure.sh.tmp" or die "Can't redirect stdout";
	print OFILE "#!/bin/bash\n";
	print OFILE "$0 @invoke \$@\n";
	print OFILE "exit \$?\n";
	close OFILE;

	system("mv ${objdir}/.configure.sh.tmp ${objdir}/.configure.sh");

	print "Completed Makefile configuration\n\n";

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