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#
# general code to read dpkg-cross configuration
#
sub read_config {
my $package;
open( F, "<$conffile" ) || return;
while( <F> ) {
next if /^(\s*#|$)/;
if (/\s*([\w\d_]+)\s*=\s*(.*)\s*$/) {
if ($package) {
${$pkgvars{$package}}{$1} = $2;
}
elsif (grep $_ eq $1, @intern_vars) {
eval "\$$1 = '$2'";
}
else {
warn "$progname: Warning: definition of unknown variable $1 ".
"in $conffile, line $.\n";
next;
}
}
elsif (/^\s*([\w\d.-]+):\s*$/) {
$package = $1;
}
else {
warn "$progname: unrecognized line in $conffile, line $.\n";
}
}
close( F );
}
sub setup {
my( $package, $var );
my @vars = ( "arch", @intern_vars );
# finalize, no subst possible crossbase
$crossbase ||= "/usr/local";
# set defaults for internal vars, if not set
$crossprefix ||= "\$(ARCH)-linux-";
$crossdir ||= "\$(CROSSBASE)/\$(ARCH)-linux";
$crossbin ||= "\$(CROSSDIR)/bin";
$crosslib ||= "\$(CROSSDIR)/lib";
$crossinc ||= "\$(CROSSDIR)/include";
$crossinfo ||= "\$(CROSSLIB)/dpkg-cross-info";
# and substitute references in them
foreach $var ( @intern_vars ) {
next if $var eq "crossbase" || $var eq "maintainer";
subst( eval "\\\$$var", $var, @vars );
}
# substitute variable references in package var definitions
foreach $package ( keys %pkgvars ) {
foreach $var ( keys %{$pkgvars{$package}} ) {
subst( \${$pkgvars{$package}}{$var}, $var, @vars );
}
}
}
sub subst {
my $valref = shift(@_);
my $varname = shift(@_);
my @defined_vars = @_;
my( $fulltext, $name, $newval );
while( $$valref =~ /\$\((\w+)\)/ ) {
$name = $1;
if (grep "\U$_\E" eq $name, @defined_vars ) {
$newval = eval "\"\$\L$name\E\"";
}
elsif (!($newval = $ENV{$name})) {
warn "$progname: Cannot substitute \$($name) in definition ".
"of $varname\n";
$newval = "";
}
$$valref =~ s/\$\($name\)/$newval/;
}
}
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