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221 lines
8.3 KiB
Perl
221 lines
8.3 KiB
Perl
{- # -*- Mode: perl -*-
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use File::Basename;
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# A cache of objects for which a recipe has already been generated
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my %cache;
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# resolvedepends and reducedepends work in tandem to make sure
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# there are no duplicate dependencies and that they are in the
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# right order. This is especially used to sort the list of
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# libraries that a build depends on.
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sub extensionlesslib {
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my @result = map { $_ =~ /(\.a)?$/; $` } @_;
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return @result if wantarray;
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return $result[0];
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}
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sub resolvedepends {
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my $thing = shift;
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my $extensionlessthing = extensionlesslib($thing);
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my @listsofar = @_; # to check if we're looping
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my @list = @{$unified_info{depends}->{$thing} //
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$unified_info{depends}->{$extensionlessthing}};
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my @newlist = ();
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if (scalar @list) {
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foreach my $item (@list) {
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my $extensionlessitem = extensionlesslib($item);
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# It's time to break off when the dependency list starts looping
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next if grep { extensionlesslib($_) eq $extensionlessitem } @listsofar;
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push @newlist, $item, resolvedepends($item, @listsofar, $item);
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}
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}
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@newlist;
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}
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sub reducedepends {
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my @list = @_;
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my @newlist = ();
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my %replace = ();
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while (@list) {
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my $item = shift @list;
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my $extensionlessitem = extensionlesslib($item);
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if (grep { $extensionlessitem eq extensionlesslib($_) } @list) {
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if ($item ne $extensionlessitem) {
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# If this instance of the library is explicitly static, we
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# prefer that to any shared library name, since it must have
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# been done on purpose.
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$replace{$extensionlessitem} = $item;
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}
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} else {
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push @newlist, $item;
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}
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}
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map { $replace{$_} // $_; } @newlist;
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}
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# is_installed checks if a given file will be installed (i.e. they are
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# not defined _NO_INST in build.info)
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sub is_installed {
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my $product = shift;
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if (grep { $product eq $_ }
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map { (@{$unified_info{install}->{$_}}) }
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keys %{$unified_info{install}}) {
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return 1;
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}
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return 0;
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}
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# dogenerate is responsible for producing all the recipes that build
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# generated source files. It recurses in case a dependency is also a
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# generated source file.
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sub dogenerate {
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my $src = shift;
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return "" if $cache{$src};
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my $obj = shift;
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my $bin = shift;
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my %opts = @_;
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if ($unified_info{generate}->{$src}) {
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die "$src is generated by Configure, should not appear in build file\n"
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if ref $unified_info{generate}->{$src} eq "";
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my $script = $unified_info{generate}->{$src}->[0];
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$OUT .= generatesrc(src => $src,
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generator => $unified_info{generate}->{$src},
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generator_incs => $unified_info{includes}->{$script},
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generator_deps => $unified_info{depends}->{$script},
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deps => $unified_info{depends}->{$src},
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incs => $unified_info{includes}->{$obj},
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%opts);
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foreach (@{$unified_info{depends}->{$src}}) {
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dogenerate($_, $obj, $bin, %opts);
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}
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}
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$cache{$src} = 1;
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}
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# doobj is responsible for producing all the recipes that build
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# object files as well as dependency files.
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sub doobj {
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my $obj = shift;
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return "" if $cache{$obj};
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my $bin = shift;
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my %opts = @_;
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if (@{$unified_info{sources}->{$obj}}) {
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$OUT .= src2obj(obj => $obj,
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product => $bin,
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srcs => $unified_info{sources}->{$obj},
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deps => $unified_info{depends}->{$obj},
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incs => $unified_info{includes}->{$obj},
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%opts);
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foreach ((@{$unified_info{sources}->{$obj}},
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@{$unified_info{depends}->{$obj}})) {
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dogenerate($_, $obj, $bin, %opts);
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}
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}
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$cache{$obj} = 1;
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}
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# dolib is responsible for building libraries. It will call
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# libobj2shlib is shared libraries are produced, and obj2lib in all
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# cases. It also makes sure all object files for the library are
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# built.
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sub dolib {
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my $lib = shift;
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return "" if $cache{$lib};
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unless ($disabled{shared} || $lib =~ /\.a$/) {
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$OUT .= libobj2shlib(shlib => $unified_info{sharednames}->{$lib},
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lib => $lib,
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objs => [ @{$unified_info{shared_sources}->{$lib}},
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@{$unified_info{sources}->{$lib}} ],
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deps => [ reducedepends(resolvedepends($lib)) ],
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installed => is_installed($lib));
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foreach ((@{$unified_info{shared_sources}->{$lib}},
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@{$unified_info{sources}->{$lib}})) {
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# If this is somehow a compiled object, take care of it that way
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# Otherwise, it might simply be generated
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if (defined $unified_info{sources}->{$_}) {
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doobj($_, $lib, intent => "lib", installed => is_installed($lib));
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} else {
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dogenerate($_, undef, undef, intent => "lib");
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}
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}
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}
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$OUT .= obj2lib(lib => $lib,
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objs => [ @{$unified_info{sources}->{$lib}} ]);
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foreach (@{$unified_info{sources}->{$lib}}) {
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doobj($_, $lib, intent => "lib", installed => is_installed($lib));
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}
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$cache{$lib} = 1;
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}
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# doengine is responsible for building engines. It will call
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# obj2dso, and also makes sure all object files for the library
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# are built.
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sub doengine {
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my $lib = shift;
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return "" if $cache{$lib};
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$OUT .= obj2dso(lib => $lib,
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objs => [ @{$unified_info{sources}->{$lib}},
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@{$unified_info{shared_sources}->{$lib}} ],
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deps => [ resolvedepends($lib) ],
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installed => is_installed($lib));
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foreach ((@{$unified_info{sources}->{$lib}},
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@{$unified_info{shared_sources}->{$lib}})) {
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doobj($_, $lib, intent => "dso", installed => is_installed($lib));
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}
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$cache{$lib} = 1;
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}
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# dobin is responsible for building programs. It will call obj2bin,
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# and also makes sure all object files for the library are built.
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sub dobin {
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my $bin = shift;
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return "" if $cache{$bin};
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my $deps = [ reducedepends(resolvedepends($bin)) ];
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$OUT .= obj2bin(bin => $bin,
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objs => [ @{$unified_info{sources}->{$bin}} ],
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deps => $deps,
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installed => is_installed($bin));
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foreach (@{$unified_info{sources}->{$bin}}) {
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doobj($_, $bin, intent => "bin", installed => is_installed($bin));
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}
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$cache{$bin} = 1;
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}
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# dobin is responsible for building scripts from templates. It will
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# call in2script.
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sub doscript {
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my $script = shift;
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return "" if $cache{$script};
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$OUT .= in2script(script => $script,
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sources => $unified_info{sources}->{$script},
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installed => is_installed($script));
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$cache{$script} = 1;
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}
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sub dodir {
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my $dir = shift;
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return "" if !exists(&generatedir) or $cache{$dir};
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$OUT .= generatedir(dir => $dir,
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deps => $unified_info{dirinfo}->{$dir}->{deps},
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%{$unified_info{dirinfo}->{$_}->{products}});
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$cache{$dir} = 1;
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}
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# Start with populating the cache with all the overrides
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%cache = map { $_ => 1 } @{$unified_info{overrides}};
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# Build mandatory generated headers
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foreach (@{$unified_info{depends}->{""}}) { dogenerate($_); }
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# Build all known libraries, engines, programs and scripts.
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# Everything else will be handled as a consequence.
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foreach (@{$unified_info{libraries}}) { dolib($_); }
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foreach (@{$unified_info{engines}}) { doengine($_); }
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foreach (@{$unified_info{programs}}) { dobin($_); }
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foreach (@{$unified_info{scripts}}) { doscript($_); }
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foreach (sort keys %{$unified_info{dirinfo}}) { dodir($_); }
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# Finally, should there be any applicable BEGINRAW/ENDRAW sections,
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# they are added here.
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$OUT .= $_."\n" foreach @{$unified_info{rawlines}};
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-}
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