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|
{- # -*- Mode: perl -*-
use File::Basename;
# A cache of objects for which a recipe has already been generated
my %cache;
# resolvedepends and reducedepends work in tandem to make sure
# there are no duplicate dependencies and that they are in the
# right order. This is especially used to sort the list of
# libraries that a build depends on.
sub extensionlesslib {
my @result = map { $_ =~ /(\.a)?$/; $` } @_;
return @result if wantarray;
return $result[0];
}
sub resolvedepends {
my $thing = shift;
my $extensionlessthing = extensionlesslib($thing);
my @listsofar = @_; # to check if we're looping
my @list = @{$unified_info{depends}->{$thing} //
$unified_info{depends}->{$extensionlessthing}};
my @newlist = ();
if (scalar @list) {
foreach my $item (@list) {
my $extensionlessitem = extensionlesslib($item);
# It's time to break off when the dependency list starts looping
next if grep { extensionlesslib($_) eq $extensionlessitem } @listsofar;
push @newlist, $item, resolvedepends($item, @listsofar, $item);
}
}
@newlist;
}
sub reducedepends {
my @list = @_;
my @newlist = ();
my %replace = ();
while (@list) {
my $item = shift @list;
my $extensionlessitem = extensionlesslib($item);
if (grep { $extensionlessitem eq extensionlesslib($_) } @list) {
if ($item ne $extensionlessitem) {
# If this instance of the library is explicitly static, we
# prefer that to any shared library name, since it must have
# been done on purpose.
$replace{$extensionlessitem} = $item;
}
} else {
push @newlist, $item;
}
}
map { $replace{$_} // $_; } @newlist;
}
# dogenerate is responsible for producing all the recipes that build
# generated source files. It recurses in case a dependency is also a
# generated source file.
sub dogenerate {
my $src = shift;
return "" if $cache{$src};
my $obj = shift;
my $bin = shift;
my %opts = @_;
if ($unified_info{generate}->{$src}) {
die "$src is generated by Configure, should not appear in build file\n"
if ref $unified_info{generate}->{$src} eq "";
my $script = $unified_info{generate}->{$src}->[0];
$OUT .= generatesrc(src => $src,
product => $bin,
generator => $unified_info{generate}->{$src},
generator_incs => $unified_info{includes}->{$script},
generator_deps => $unified_info{depends}->{$script},
deps => $unified_info{depends}->{$src},
incs => [ @{$unified_info{includes}->{$obj}},
@{$unified_info{includes}->{$bin}} ],
defs => [ @{$unified_info{defines}->{$obj}},
@{$unified_info{defines}->{$bin}} ],
%opts);
foreach (@{$unified_info{depends}->{$src}}) {
dogenerate($_, $obj, $bin, %opts);
}
}
$cache{$src} = 1;
}
# doobj is responsible for producing all the recipes that build
# object files as well as dependency files.
sub doobj {
my $obj = shift;
return "" if $cache{$obj};
my $bin = shift;
my %opts = @_;
if (@{$unified_info{sources}->{$obj}}) {
$OUT .= src2obj(obj => $obj,
product => $bin,
srcs => $unified_info{sources}->{$obj},
deps => $unified_info{depends}->{$obj},
incs => [ @{$unified_info{includes}->{$obj}},
@{$unified_info{includes}->{$bin}} ],
defs => [ @{$unified_info{defines}->{$obj}},
@{$unified_info{defines}->{$bin}} ],
%opts);
foreach ((@{$unified_info{sources}->{$obj}},
@{$unified_info{depends}->{$obj}})) {
dogenerate($_, $obj, $bin, %opts);
}
}
$cache{$obj} = 1;
}
# dolib is responsible for building libraries. It will call
# obj2shlib is shared libraries are produced, and obj2lib in all
# cases. It also makes sure all object files for the library are
# built.
sub dolib {
my $lib = shift;
return "" if $cache{$lib};
unless ($disabled{shared} || $lib =~ /\.a$/) {
my $obj2shlib = defined &obj2shlib ? \&obj2shlib : \&libobj2shlib;
$OUT .= $obj2shlib->(lib => $lib,
attrs => $unified_info{attributes}->{libraries}->{$lib},
objs => $unified_info{shared_sources}->{$lib},
deps => [ reducedepends(resolvedepends($lib)) ]);
foreach ((@{$unified_info{shared_sources}->{$lib}},
@{$unified_info{sources}->{$lib}})) {
# If this is somehow a compiled object, take care of it that way
# Otherwise, it might simply be generated
if (defined $unified_info{sources}->{$_}) {
doobj($_, $lib, intent => "shlib",
attrs => $unified_info{attributes}->{libraries}->{$lib});
} else {
dogenerate($_, undef, undef, intent => "lib");
}
}
}
$OUT .= obj2lib(lib => $lib,
attrs => $unified_info{attributes}->{libraries}->{$lib},
objs => [ @{$unified_info{sources}->{$lib}} ]);
foreach (@{$unified_info{sources}->{$lib}}) {
doobj($_, $lib, intent => "lib",
attrs => $unified_info{attributes}->{libraries}->{$lib});
}
$cache{$lib} = 1;
}
# domodule is responsible for building modules. It will call
# obj2dso, and also makes sure all object files for the library
# are built.
sub domodule {
my $module = shift;
return "" if $cache{$module};
$OUT .= obj2dso(module => $module,
attrs => $unified_info{attributes}->{modules}->{$module},
objs => $unified_info{sources}->{$module},
deps => [ resolvedepends($module) ]);
foreach (@{$unified_info{sources}->{$module}}) {
# If this is somehow a compiled object, take care of it that way
# Otherwise, it might simply be generated
if (defined $unified_info{sources}->{$_}) {
doobj($_, $module, intent => "dso",
attrs => $unified_info{attributes}->{modules}->{$module});
} else {
dogenerate($_, undef, $module, intent => "dso");
}
}
$cache{$module} = 1;
}
# dobin is responsible for building programs. It will call obj2bin,
# and also makes sure all object files for the library are built.
sub dobin {
my $bin = shift;
return "" if $cache{$bin};
my $deps = [ reducedepends(resolvedepends($bin)) ];
$OUT .= obj2bin(bin => $bin,
attrs => $unified_info{attributes}->{programs}->{$bin},
objs => [ @{$unified_info{sources}->{$bin}} ],
deps => $deps);
foreach (@{$unified_info{sources}->{$bin}}) {
doobj($_, $bin, intent => "bin",
attrs => $unified_info{attributes}->{$bin});
}
$cache{$bin} = 1;
}
# dobin is responsible for building scripts from templates. It will
# call in2script.
sub doscript {
my $script = shift;
return "" if $cache{$script};
$OUT .= in2script(script => $script,
attrs => $unified_info{attributes}->{$script},
sources => $unified_info{sources}->{$script});
$cache{$script} = 1;
}
sub dodir {
my $dir = shift;
return "" if !exists(&generatedir) or $cache{$dir};
$OUT .= generatedir(dir => $dir,
deps => $unified_info{dirinfo}->{$dir}->{deps},
%{$unified_info{dirinfo}->{$_}->{products}});
$cache{$dir} = 1;
}
# Start with populating the cache with all the overrides
%cache = map { $_ => 1 } @{$unified_info{overrides}};
# Build mandatory generated headers
foreach (@{$unified_info{depends}->{""}}) { dogenerate($_); }
# Build all known libraries, modules, programs and scripts.
# Everything else will be handled as a consequence.
foreach (@{$unified_info{libraries}}) { dolib($_); }
foreach (@{$unified_info{modules}}) { domodule($_); }
foreach (@{$unified_info{programs}}) { dobin($_); }
foreach (@{$unified_info{scripts}}) { doscript($_); }
foreach (sort keys %{$unified_info{dirinfo}}) { dodir($_); }
-}
|
