Configurations/common.tmpl

   1 {- # -*- Mode: perl -*-
   2
   3      # A cache of objects for which a recipe has already been generated
   4      my %cache;
   5
   6  # resolvedepends and reducedepends work in tandem to make sure
   7  # there are no duplicate dependencies and that they are in the
   8  # right order.  This is especially used to sort the list of
   9  # libraries that a build depends on.
  10  sub resolvedepends {
  11      my $thing = shift;
  12      my @listsofar = @_;    # to check if we're looping
  13      my @list = @{$unified_info{depends}->{$thing}};
  14      my @newlist = ();
  15      if (scalar @list) {
  16          foreach my $item (@list) {
  17              # It's time to break off when the dependency list starts looping
  18              next if grep { $_ eq $item } @listsofar;
  19              push @newlist, $item, resolvedepends($item, @listsofar, $item);
  20          }
  21      }
  22      @newlist;
  23  }
  24  sub reducedepends {
  25      my @list = @_;
  26      my @newlist = ();
  27      while (@list) {
  28          my $item = shift @list;
  29          push @newlist, $item
  30              unless grep { $item eq $_ } @list;
  31      }
  32      @newlist;
  33  }
  34
  35  # dogenerate is responsible for producing all the recipes that build
  36  # generated source files.  It recurses in case a dependency is also a
  37  # generated source file.
  38  sub dogenerate {
  39      my $src = shift;
  40      return "" if $cache{$src};
  41      my $obj = shift;
  42      my $bin = shift;
  43      my %opts = @_;
  44      if ($unified_info{generate}->{$src}) {
  45          $OUT .= generatesrc(src => $src,
  46                              generator => $unified_info{generate}->{$src},
  47                              deps => $unified_info{depends}->{$src},
  48                              incs => [ @{$unified_info{includes}->{$bin}},
  49                                        @{$unified_info{includes}->{$obj}} ],
  50                              %opts);
  51          foreach (@{$unified_info{depends}->{$src}}) {
  52              dogenerate($_, $obj, $bin, %opts);
  53          }
  54      }
  55      $cache{$src} = 1;
  56  }
  57
  58  # doobj is responsible for producing all the recipes that build
  59  # object files as well as dependency files.
  60  sub doobj {
  61      my $obj = shift;
  62      return "" if $cache{$obj};
  63      (my $obj_no_o = $obj) =~ s|\.o$||;
  64      my $bin = shift;
  65      my %opts = @_;
  66      if (@{$unified_info{sources}->{$obj}}) {
  67          $OUT .= src2obj(obj => $obj_no_o,
  68                          srcs => $unified_info{sources}->{$obj},
  69                          deps => $unified_info{depends}->{$obj},
  70                          incs => [ @{$unified_info{includes}->{$bin}},
  71                                    @{$unified_info{includes}->{$obj}} ],
  72                          %opts);
  73          foreach ((@{$unified_info{sources}->{$obj}},
  74                    @{$unified_info{depends}->{$obj}})) {
  75              dogenerate($_, $obj, $bin, %opts);
  76          }
  77      }
  78      $cache{$obj} = 1;
  79  }
  80
  81  # dolib is responsible for building libraries.  It will call
  82  # libobj2shlib is shared libraries are produced, and obj2lib in all
  83  # cases.  It also makes sure all object files for the library are
  84  # built.
  85  sub dolib {
  86      my $lib = shift;
  87      return "" if $cache{$lib};
  88      unless ($disabled{shared}) {
  89          my %ordinals =
  90              $unified_info{ordinals}->{$lib}
  91              ? (ordinals => $unified_info{ordinals}->{$lib}) : ();
  92          $OUT .= libobj2shlib(shlib => $unified_info{sharednames}->{$lib},
  93                               lib => $lib,
  94                               objs => [ map { (my $x = $_) =~ s|\.o$||; $x }
  95                                         (@{$unified_info{sources}->{$lib}},
  96                                          @{$unified_info{shared_sources}->{$lib}}) ],
  97                               deps => [ reducedepends(resolvedepends($lib)) ],
  98                               %ordinals);
  99          foreach (@{$unified_info{shared_sources}->{$lib}}) {
 100              doobj($_, $lib, intent => "lib");
 101          }
 102      }
 103      $OUT .= obj2lib(lib => $lib,
 104                      objs => [ map { (my $x = $_) =~ s|\.o$||; $x }
 105                                @{$unified_info{sources}->{$lib}} ]);
 106      foreach (@{$unified_info{sources}->{$lib}}) {
 107          doobj($_, $lib, intent => "lib");
 108      }
 109      $cache{$lib} = 1;
 110  }
 111
 112  # doengine is responsible for building engines.  It will call
 113  # obj2dso, and also makes sure all object files for the library
 114  # are built.
 115  sub doengine {
 116      my $lib = shift;
 117      return "" if $cache{$lib};
 118      $OUT .= obj2dso(lib => $lib,
 119                      objs => [ map { (my $x = $_) =~ s|\.o$||; $x }
 120                                (@{$unified_info{sources}->{$lib}},
 121                                 @{$unified_info{shared_sources}->{$lib}}) ],
 122                      deps => [ resolvedepends($lib) ]);
 123      foreach ((@{$unified_info{sources}->{$lib}},
 124                @{$unified_info{shared_sources}->{$lib}})) {
 125          doobj($_, $lib, intent => "dso");
 126      }
 127      $cache{$lib} = 1;
 128  }
 129
 130  # dobin is responsible for building programs.  It will call obj2bin,
 131  # and also makes sure all object files for the library are built.
 132  sub dobin {
 133      my $bin = shift;
 134      return "" if $cache{$bin};
 135      my $deps = [ reducedepends(resolvedepends($bin)) ];
 136      $OUT .= obj2bin(bin => $bin,
 137                      objs => [ map { (my $x = $_) =~ s|\.o$||; $x }
 138                                @{$unified_info{sources}->{$bin}} ],
 139                      deps => $deps);
 140      foreach (@{$unified_info{sources}->{$bin}}) {
 141          doobj($_, $bin, intent => "bin");
 142      }
 143      $cache{$bin} = 1;
 144  }
 145
 146  # dobin is responsible for building scripts from templates.  It will
 147  # call in2script.
 148  sub doscript {
 149      my $script = shift;
 150      return "" if $cache{$script};
 151      $OUT .= in2script(script => $script,
 152                        sources => $unified_info{sources}->{$script});
 153      $cache{$script} = 1;
 154  }
 155
 156  # Start with populating the cache with all the overrides
 157  %cache = map { $_ => 1 } @{$unified_info{overrides}};
 158
 159  # Build all known libraries, engines, programs and scripts.
 160  # Everything else will be handled as a consequence.
 161  foreach (@{$unified_info{libraries}}) { dolib($_);    }
 162  foreach (@{$unified_info{engines}})   { doengine($_); }
 163  foreach (@{$unified_info{programs}})  { dobin($_);    }
 164  foreach (@{$unified_info{scripts}})   { doscript($_); }
 165
 166  # Finally, should there be any applicable BEGINRAW/ENDRAW sections,
 167  # they are added here.
 168  $OUT .= $_."\n" foreach @{$unified_info{rawlines}};
 169 -}