Configurations/common.tmpl

   1 {- # -*- Mode: perl -*-
   2
   3  use File::Basename;
   4
   5  # A cache of objects for which a recipe has already been generated
   6  my %cache;
   7
   8  # resolvedepends and reducedepends work in tandem to make sure
   9  # there are no duplicate dependencies and that they are in the
  10  # right order.  This is especially used to sort the list of
  11  # libraries that a build depends on.
  12  sub extensionlesslib {
  13      my @result = map { $_ =~ /(\.a)?$/; $` } @_;
  14      return @result if wantarray;
  15      return $result[0];
  16  }
  17  sub resolvedepends {
  18      my $thing = shift;
  19      my $extensionlessthing = extensionlesslib($thing);
  20      my @listsofar = @_;    # to check if we're looping
  21      my @list = @{$unified_info{depends}->{$thing} //
  22                       $unified_info{depends}->{$extensionlessthing}};
  23      my @newlist = ();
  24      if (scalar @list) {
  25          foreach my $item (@list) {
  26              my $extensionlessitem = extensionlesslib($item);
  27              # It's time to break off when the dependency list starts looping
  28              next if grep { extensionlesslib($_) eq $extensionlessitem } @listsofar;
  29              push @newlist, $item, resolvedepends($item, @listsofar, $item);
  30          }
  31      }
  32      @newlist;
  33  }
  34  sub reducedepends {
  35      my @list = @_;
  36      my @newlist = ();
  37      my %replace = ();
  38      while (@list) {
  39          my $item = shift @list;
  40          my $extensionlessitem = extensionlesslib($item);
  41          if (grep { $extensionlessitem eq extensionlesslib($_) } @list) {
  42              if ($item ne $extensionlessitem) {
  43                  # If this instance of the library is explicitly static, we
  44                  # prefer that to any shared library name, since it must have
  45                  # been done on purpose.
  46                  $replace{$extensionlessitem} = $item;
  47              }
  48          } else {
  49              push @newlist, $item;
  50          }
  51      }
  52      map { $replace{$_} // $_; } @newlist;
  53  }
  54
  55  # dogenerate is responsible for producing all the recipes that build
  56  # generated source files.  It recurses in case a dependency is also a
  57  # generated source file.
  58  sub dogenerate {
  59      my $src = shift;
  60      return "" if $cache{$src};
  61      my $obj = shift;
  62      my $bin = shift;
  63      my %opts = @_;
  64      if ($unified_info{generate}->{$src}) {
  65          die "$src is generated by Configure, should not appear in build file\n"
  66              if ref $unified_info{generate}->{$src} eq "";
  67          my $script = $unified_info{generate}->{$src}->[0];
  68          $OUT .= generatesrc(src => $src,
  69                              product => $bin,
  70                              generator => $unified_info{generate}->{$src},
  71                              generator_incs => $unified_info{includes}->{$script},
  72                              generator_deps => $unified_info{depends}->{$script},
  73                              deps => $unified_info{depends}->{$src},
  74                              incs => [ @{$unified_info{includes}->{$obj}},
  75                                        @{$unified_info{includes}->{$bin}} ],
  76                              defs => [ @{$unified_info{defines}->{$obj}},
  77                                        @{$unified_info{defines}->{$bin}} ],
  78                              %opts);
  79          foreach (@{$unified_info{depends}->{$src}}) {
  80              dogenerate($_, $obj, $bin, %opts);
  81          }
  82      }
  83      $cache{$src} = 1;
  84  }
  85
  86  # doobj is responsible for producing all the recipes that build
  87  # object files as well as dependency files.
  88  sub doobj {
  89      my $obj = shift;
  90      return "" if $cache{$obj};
  91      my $bin = shift;
  92      my %opts = @_;
  93      if (@{$unified_info{sources}->{$obj}}) {
  94          $OUT .= src2obj(obj => $obj,
  95                          product => $bin,
  96                          srcs => $unified_info{sources}->{$obj},
  97                          deps => $unified_info{depends}->{$obj},
  98                          incs => [ @{$unified_info{includes}->{$obj}},
  99                                    @{$unified_info{includes}->{$bin}} ],
 100                          defs => [ @{$unified_info{defines}->{$obj}},
 101                                    @{$unified_info{defines}->{$bin}} ],
 102                          %opts);
 103          foreach ((@{$unified_info{sources}->{$obj}},
 104                    @{$unified_info{depends}->{$obj}})) {
 105              dogenerate($_, $obj, $bin, %opts);
 106          }
 107      }
 108      $cache{$obj} = 1;
 109  }
 110
 111  # dolib is responsible for building libraries.  It will call
 112  # obj2shlib is shared libraries are produced, and obj2lib in all
 113  # cases.  It also makes sure all object files for the library are
 114  # built.
 115  sub dolib {
 116      my $lib = shift;
 117      return "" if $cache{$lib};
 118      unless ($disabled{shared} || $lib =~ /\.a$/) {
 119          my $obj2shlib = defined &obj2shlib ? \&obj2shlib : \&libobj2shlib;
 120          $OUT .= $obj2shlib->(lib => $lib,
 121                               attrs => $unified_info{attributes}->{$lib},
 122                               objs => $unified_info{shared_sources}->{$lib},
 123                               deps => [ reducedepends(resolvedepends($lib)) ]);
 124          foreach ((@{$unified_info{shared_sources}->{$lib}},
 125                    @{$unified_info{sources}->{$lib}})) {
 126              # If this is somehow a compiled object, take care of it that way
 127              # Otherwise, it might simply be generated
 128              if (defined $unified_info{sources}->{$_}) {
 129                  doobj($_, $lib, intent => "shlib",
 130                        attrs => $unified_info{attributes}->{$lib});
 131              } else {
 132                  dogenerate($_, undef, undef, intent => "lib");
 133              }
 134          }
 135      }
 136      $OUT .= obj2lib(lib => $lib,
 137                      attrs => $unified_info{attributes}->{$lib},
 138                      objs => [ @{$unified_info{sources}->{$lib}} ]);
 139      foreach (@{$unified_info{sources}->{$lib}}) {
 140          doobj($_, $lib, intent => "lib",
 141                attrs => $unified_info{attributes}->{$lib});
 142      }
 143      $cache{$lib} = 1;
 144  }
 145
 146  # domodule is responsible for building modules.  It will call
 147  # obj2dso, and also makes sure all object files for the library
 148  # are built.
 149  sub domodule {
 150      my $lib = shift;
 151      return "" if $cache{$lib};
 152      $OUT .= obj2dso(lib => $lib,
 153                      attrs => $unified_info{attributes}->{$lib},
 154                      objs => $unified_info{sources}->{$lib},
 155                      deps => [ resolvedepends($lib) ]);
 156      foreach (@{$unified_info{sources}->{$lib}}) {
 157          # If this is somehow a compiled object, take care of it that way
 158          # Otherwise, it might simply be generated
 159          if (defined $unified_info{sources}->{$_}) {
 160              doobj($_, $lib, intent => "dso",
 161                    attrs => $unified_info{attributes}->{$lib});
 162          } else {
 163              dogenerate($_, undef, $lib, intent => "dso");
 164          }
 165      }
 166      $cache{$lib} = 1;
 167  }
 168
 169  # dobin is responsible for building programs.  It will call obj2bin,
 170  # and also makes sure all object files for the library are built.
 171  sub dobin {
 172      my $bin = shift;
 173      return "" if $cache{$bin};
 174      my $deps = [ reducedepends(resolvedepends($bin)) ];
 175      $OUT .= obj2bin(bin => $bin,
 176                      attrs => $unified_info{attributes}->{$bin},
 177                      objs => [ @{$unified_info{sources}->{$bin}} ],
 178                      deps => $deps);
 179      foreach (@{$unified_info{sources}->{$bin}}) {
 180          doobj($_, $bin, intent => "bin",
 181                attrs => $unified_info{attributes}->{$bin});
 182      }
 183      $cache{$bin} = 1;
 184  }
 185
 186  # dobin is responsible for building scripts from templates.  It will
 187  # call in2script.
 188  sub doscript {
 189      my $script = shift;
 190      return "" if $cache{$script};
 191      $OUT .= in2script(script => $script,
 192                        attrs => $unified_info{attributes}->{$script},
 193                        sources => $unified_info{sources}->{$script});
 194      $cache{$script} = 1;
 195  }
 196
 197  sub dodir {
 198      my $dir = shift;
 199      return "" if !exists(&generatedir) or $cache{$dir};
 200      $OUT .= generatedir(dir => $dir,
 201                          deps => $unified_info{dirinfo}->{$dir}->{deps},
 202                          %{$unified_info{dirinfo}->{$_}->{products}});
 203      $cache{$dir} = 1;
 204  }
 205
 206  # Start with populating the cache with all the overrides
 207  %cache = map { $_ => 1 } @{$unified_info{overrides}};
 208
 209  # Build mandatory generated headers
 210  foreach (@{$unified_info{depends}->{""}}) { dogenerate($_); }
 211
 212  # Build all known libraries, modules, programs and scripts.
 213  # Everything else will be handled as a consequence.
 214  foreach (@{$unified_info{libraries}}) { dolib($_);    }
 215  foreach (@{$unified_info{modules}})   { domodule($_); }
 216  foreach (@{$unified_info{programs}})  { dobin($_);    }
 217  foreach (@{$unified_info{scripts}})   { doscript($_); }
 218
 219  foreach (sort keys %{$unified_info{dirinfo}})  { dodir($_); }
 220 -}