#! /usr/bin/perl

use strict;

my $cfg_prefix   = "CONFIG";
my @arch_opts    = ("IA32", "ARM", "UX" ,"XARCH");
my @abi_opts     = ("V2", "X0", "V4", "ABI");
my @base_opts    = ("INLINE", "NDEBUG", "NO_FRAME_PTR", "FINE_GRAINED_CPUTIME",
                    "FFUN");
my @debug_opts   = ("KDB","JDB","VMEM_ALLOC_TEST","SERIAL", "PERF_CNT");
my @compile_opts = ("VERBOSE", "MAINTAINER_MODE");

my %cfg_files    = ("arch_config.cfg"    => \@arch_opts,
                    "abi_config.cfg"     => \@abi_opts,
		    "base_config.cfg"    => \@base_opts,
		    "debug_config.cfg"   => \@debug_opts,
		    "compile_config.cfg" => \@compile_opts);
my $other_opts   = "other_config.cfg";

my %cfg_files_2;

my $outfile = shift;
my $outhdl;
my $other = 0;

open($outhdl,">$outfile") || die "$outfile: $!";

foreach my $cfg (keys %cfg_files)
{
  my $cfgs = $cfg_files{$cfg};
  for (my $i = 0; $i <= $#$cfgs; $i++)
    {
      $cfgs->[$i] = $cfg_prefix."_".$cfgs->[$i];
    }
}

my $expr;

if ($outfile eq $other_opts)
{
  $other = 1;
  foreach my $cfg (keys %cfg_files)
  {
    my $cfgs = $cfg_files{$cfg};
    if ($expr ne "")
    {
      $expr = join("|", ($expr, @$cfgs));
    } else {
      $expr = join("|", @$cfgs);
    }
  }
} else {
  my $cfgs = $cfg_files{$outfile};
  exit 0 if (!defined $cfgs) ;
  $expr= join("|", @$cfgs);
}

while(<>)
{
  my $written = 0;
  if (/^($expr)/ xor $other)
  {
    print $outhdl $_;
  }
}

close $outhdl;