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  # is_installed checks if a given file will be installed (i.e. they are
  56  # not defined _NO_INST in build.info)
  57  sub is_installed {
  58      my $product = shift;
  59      if (grep { $product eq $_ }
  60          map { (@{$unified_info{install}->{$_}}) }
  61          keys %{$unified_info{install}}) {
  62          return 1;
  63      }
  64      return 0;
  65  }
  66
  67  # dogenerate is responsible for producing all the recipes that build
  68  # generated source files.  It recurses in case a dependency is also a
  69  # generated source file.
  70  sub dogenerate {
  71      my $src = shift;
  72      return "" if $cache{$src};
  73      my $obj = shift;
  74      my $bin = shift;
  75      my %opts = @_;
  76      if ($unified_info{generate}->{$src}) {
  77          die "$src is generated by Configure, should not appear in build file\n"
  78              if ref $unified_info{generate}->{$src} eq "";
  79          my $script = $unified_info{generate}->{$src}->[0];
  80          $OUT .= generatesrc(src => $src,
  81                              generator => $unified_info{generate}->{$src},
  82                              generator_incs => $unified_info{includes}->{$script},
  83                              generator_deps => $unified_info{depends}->{$script},
  84                              deps => $unified_info{depends}->{$src},
  85                              incs => $unified_info{includes}->{$obj},
  86                              %opts);
  87          foreach (@{$unified_info{depends}->{$src}}) {
  88              dogenerate($_, $obj, $bin, %opts);
  89          }
  90      }
  91      $cache{$src} = 1;
  92  }
  93
  94  # doobj is responsible for producing all the recipes that build
  95  # object files as well as dependency files.
  96  sub doobj {
  97      my $obj = shift;
  98      return "" if $cache{$obj};
  99      my $bin = shift;
 100      my %opts = @_;
 101      if (@{$unified_info{sources}->{$obj}}) {
 102          $OUT .= src2obj(obj => $obj,
 103                          product => $bin,
 104                          srcs => $unified_info{sources}->{$obj},
 105                          deps => $unified_info{depends}->{$obj},
 106                          incs => $unified_info{includes}->{$obj},
 107                          %opts);
 108          foreach ((@{$unified_info{sources}->{$obj}},
 109                    @{$unified_info{depends}->{$obj}})) {
 110              dogenerate($_, $obj, $bin, %opts);
 111          }
 112      }
 113      $cache{$obj} = 1;
 114  }
 115
 116  # dolib is responsible for building libraries.  It will call
 117  # libobj2shlib is shared libraries are produced, and obj2lib in all
 118  # cases.  It also makes sure all object files for the library are
 119  # built.
 120  sub dolib {
 121      my $lib = shift;
 122      return "" if $cache{$lib};
 123      unless ($disabled{shared} || $lib =~ /\.a$/) {
 124          $OUT .= libobj2shlib(shlib => $unified_info{sharednames}->{$lib},
 125                               lib => $lib,
 126                               objs => [ @{$unified_info{shared_sources}->{$lib}},
 127                                         @{$unified_info{sources}->{$lib}} ],
 128                               deps => [ reducedepends(resolvedepends($lib)) ],
 129                               installed => is_installed($lib));
 130          foreach ((@{$unified_info{shared_sources}->{$lib}},
 131                    @{$unified_info{sources}->{$lib}})) {
 132              # If this is somehow a compiled object, take care of it that way
 133              # Otherwise, it might simply be generated
 134              if (defined $unified_info{sources}->{$_}) {
 135                  doobj($_, $lib, intent => "lib", installed => is_installed($lib));
 136              } else {
 137                  dogenerate($_, undef, undef, intent => "lib");
 138              }
 139          }
 140      }
 141      $OUT .= obj2lib(lib => $lib,
 142                      objs => [ @{$unified_info{sources}->{$lib}} ]);
 143      foreach (@{$unified_info{sources}->{$lib}}) {
 144          doobj($_, $lib, intent => "lib", installed => is_installed($lib));
 145      }
 146      $cache{$lib} = 1;
 147  }
 148
 149  # doengine is responsible for building engines.  It will call
 150  # obj2dso, and also makes sure all object files for the library
 151  # are built.
 152  sub doengine {
 153      my $lib = shift;
 154      return "" if $cache{$lib};
 155      $OUT .= obj2dso(lib => $lib,
 156                      objs => [ @{$unified_info{sources}->{$lib}},
 157                                @{$unified_info{shared_sources}->{$lib}} ],
 158                      deps => [ resolvedepends($lib) ],
 159                      installed => is_installed($lib));
 160      foreach ((@{$unified_info{sources}->{$lib}},
 161                @{$unified_info{shared_sources}->{$lib}})) {
 162          doobj($_, $lib, intent => "dso", installed => is_installed($lib));
 163      }
 164      $cache{$lib} = 1;
 165  }
 166
 167  # dobin is responsible for building programs.  It will call obj2bin,
 168  # and also makes sure all object files for the library are built.
 169  sub dobin {
 170      my $bin = shift;
 171      return "" if $cache{$bin};
 172      my $deps = [ reducedepends(resolvedepends($bin)) ];
 173      $OUT .= obj2bin(bin => $bin,
 174                      objs => [ @{$unified_info{sources}->{$bin}} ],
 175                      deps => $deps,
 176                      installed => is_installed($bin));
 177      foreach (@{$unified_info{sources}->{$bin}}) {
 178          doobj($_, $bin, intent => "bin", installed => is_installed($bin));
 179      }
 180      $cache{$bin} = 1;
 181  }
 182
 183  # dobin is responsible for building scripts from templates.  It will
 184  # call in2script.
 185  sub doscript {
 186      my $script = shift;
 187      return "" if $cache{$script};
 188      $OUT .= in2script(script => $script,
 189                        sources => $unified_info{sources}->{$script},
 190                        installed => is_installed($script));
 191      $cache{$script} = 1;
 192  }
 193
 194  sub dodir {
 195      my $dir = shift;
 196      return "" if !exists(&generatedir) or $cache{$dir};
 197      $OUT .= generatedir(dir => $dir,
 198                          deps => $unified_info{dirinfo}->{$dir}->{deps},
 199                          %{$unified_info{dirinfo}->{$_}->{products}});
 200      $cache{$dir} = 1;
 201  }
 202
 203  # Start with populating the cache with all the overrides
 204  %cache = map { $_ => 1 } @{$unified_info{overrides}};
 205
 206  # Build mandatory generated headers
 207  foreach (@{$unified_info{depends}->{""}}) { dogenerate($_); }
 208
 209  # Build all known libraries, engines, programs and scripts.
 210  # Everything else will be handled as a consequence.
 211  foreach (@{$unified_info{libraries}}) { dolib($_);    }
 212  foreach (@{$unified_info{engines}})   { doengine($_); }
 213  foreach (@{$unified_info{programs}})  { dobin($_);    }
 214  foreach (@{$unified_info{scripts}})   { doscript($_); }
 215
 216  foreach (sort keys %{$unified_info{dirinfo}})  { dodir($_); }
 217
 218  # Finally, should there be any applicable BEGINRAW/ENDRAW sections,
 219  # they are added here.
 220  $OUT .= $_."\n" foreach @{$unified_info{rawlines}};
 221 -}