use strict;
use warnings;

my $state=0;

my ($yacccompile,$sources);

while (<DATA>)
{
  if ($state==0) 
  {
    # Wait until we see SOURCES.
    if ($_=~/^SOURCES/)
    {
      # Move to next state, re-read line
      # in that next state.
      $state=1;        
      redo;           
    } 
    # ...or we see YACCCOMPILE
    elsif ($_=~/^YACCCOMPILE/)
    {
      $state=2;
      redo;
    }
  }
  elsif ($state==1) 
  {
    # See if we have reached another section:
    if ($_=~/^[A-Z]/ && $_!~/^SOURCES/ )
    {
      $state=0;
      redo;
    }
    else
    {
      # Supress blank lines.
      next unless $_=~/\w/;
      # Add the line to what we have so far.
      $sources.=$_;
    }
  }
  elsif ($state==2) 
  {
    # See if we have reached another section:
    if ($_=~/^[A-Z]/ && $_!~/^YACCCOMPILE/ )
    {
      $state=0;
      redo;
    }
    else
    {
      # Supress blank lines.
      next unless $_=~/\w/;
      # Add the line to what we have so far.
      $yacccompile.=$_;
    }
  }
}

# Now print it all out with some titles.
print "SOURCES\n-------\n\n";
print $sources;
print "\n";
print "YACCCOMPILE\n----------\n\n";
print $yacccompile;
print "\n";

__DATA__
YACCCOMPILE = $(YACC) $(YFLAGS) $(AM_YFLAGS)    
LTYACCCOMPILE = $(LIBTOOL) $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS)           \
        --mode=compile $(YACC) $(YFLAGS) $(AM_YFLAGS)
YLWRAP = $(top_srcdir)/ylwrap

SOURCES = $(libpiuserland_la_SOURCES) $(pilot_addresses_SOURCES)        \
        $(pilot_clip_SOURCES) $(pilot_csd_SOURCES)                      \
        $(pilot_debugsh_SOURCES) $(pilot_dedupe_SOURCES)                \
        $(pilot_dlpsh_SOURCES) $(pilot_file_SOURCES)                    \
        $(pilot_foto_SOURCES) $(pilot_foto_treo600_SOURCES)             \
        $(pilot_foto_treo650_SOURCES) $(pilot_getram_SOURCES)           \
        $(pilot_getrom_SOURCES) $(pilot_getromtoken_SOURCES)            \
        $(pilot_hinotes_SOURCES) $(pilot_install_datebook_SOURCES)      \
        $(pilot_install_expenses_SOURCES)                               \
        $(pilot_install_hinote_SOURCES) $(pilot_install_memo_SOURCES)   \
        $(pilot_install_netsync_SOURCES) $(pilot_install_todo_SOURCES)  \
        $(pilot_install_todos_SOURCES) $(pilot_install_user_SOURCES)    \
        $(pilot_memos_SOURCES) $(pilot_nredir_SOURCES)                  \
        $(pilot_read_expenses_SOURCES) $(pilot_read_ical_SOURCES)       \
        $(pilot_read_notepad_SOURCES) $(pilot_read_palmpix_SOURCES)     \
        $(pilot_read_screenshot_SOURCES) $(pilot_read_todos_SOURCES)    \
        $(pilot_read_veo_SOURCES) $(pilot_reminders_SOURCES)            \
        $(pilot_schlep_SOURCES) $(pilot_wav_SOURCES)                    \
        $(pilot_xfer_SOURCES)

YACCCOMPILE = niddle naddle noo

RECURSIVE_TARGETS = all-recursive check-recursive dvi-recursive         \
        html-recursive info-recursive install-data-recursive            \
        install-dvi-recursive install-exec-recursive                    \
        install-html-recursive install-info-recursive                   \
        install-pdf-recursive install-ps-recursive install-recursive    \
        installcheck-recursive installdirs-recursive pdf-recursive      \
        ps-recursive uninstall-recursive
YACCCOMPILE = foo bar baz