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# UCW Library configuration system: pkg-config and friends
# (c) 2008 Martin Mares <mj@ucw.cz>
# (c) 2017 Pavel Charvat <pchar@ucw.cz>
package UCW::Configure::Pkg;
use UCW::Configure;
use strict;
use warnings;
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(&TryCmd &PkgConfig &TrivConfig);
sub TryCmd($) {
my ($cmd) = @_;
my $res = `$cmd`;
defined $res or return;
chomp $res;
return $res unless $?;
return;
}
sub maybe_manually($) {
my ($n) = @_;
if (IsGiven($n)) {
if (Get("$n")) { Log "YES (set manually)\n"; }
else { Log "NO (set manually)\n"; }
return 1;
}
return 0;
}
sub PkgConfigTool() {
Log "Checking for pkg-config ... ";
if (!maybe_manually("CONFIG_HAVE_PKGCONFIG")) {
my $ver = TryCmd("pkg-config --version 2>/dev/null");
if (!defined $ver) {
Log("NONE\n");
Set("CONFIG_HAVE_PKGCONFIG", 0);
} else {
Log("YES: version $ver\n");
Set("CONFIG_HAVE_PKGCONFIG", 1);
Set("CONFIG_VER_PKGCONFIG", $ver);
}
}
return Get("CONFIG_HAVE_PKGCONFIG");
}
sub PkgConfig($@) {
my $pkg = shift @_;
my %opts = @_;
my $upper = $pkg; $upper =~ tr/a-z/A-Z/; $upper =~ s/[^0-9A-Z]+/_/g;
PkgConfigTool() unless IsSet("CONFIG_HAVE_PKGCONFIG");
Log "Checking for package $pkg ... ";
maybe_manually("CONFIG_HAVE_$upper") and return Get("CONFIG_HAVE_$upper");
if (!Get("CONFIG_HAVE_PKGCONFIG")) {
Log("NONE: pkg-config missing\n");
return 0;
}
my $pc = "pkg-config";
if (defined($opts{path})) {
$pc = "PKG_CONFIG_PATH=$opts{path} $pc";
}
if (defined($opts{args})) {
$pc = "$pc $opts{args}";
}
my $ver = TryCmd("$pc --modversion $pkg 2>/dev/null");
if (!defined $ver) {
Log("NONE\n");
return 0;
}
if (defined($opts{minversion})) {
my $min = $opts{minversion};
if (!defined TryCmd("$pc --atleast-version=$min $pkg")) {
Log("NO: version $ver is too old (need >= $min)\n");
return 0;
}
}
Log("YES: version $ver\n");
Set("CONFIG_HAVE_$upper" => 1);
Set("CONFIG_VER_$upper" => $ver);
my $cf = TryCmd("$pc --cflags $pkg");
Set("${upper}_CFLAGS" => $cf) if defined $cf;
my $lf = TryCmd("$pc --libs $pkg");
Set("${upper}_LIBS" => $lf) if defined $lf;
return 1;
}
sub ver_norm($) {
my ($v) = @_;
return join(".", map { sprintf("%05s", $_) } split(/\./, $v));
}
sub TrivConfig($@) {
my $pkg = shift @_;
my %opts = @_;
my $upper = $pkg; $upper =~ tr/a-z/A-Z/; $upper =~ s/[^0-9A-Z]+/_/g;
Log "Checking for package $pkg ... ";
maybe_manually("CONFIG_HAVE_$upper") and return Get("CONFIG_HAVE_$upper");
my $pc = $opts{script};
my $ver = TryCmd("$pc --version 2>/dev/null");
if (!defined $ver) {
Log("NONE\n");
return 0;
}
if (defined($opts{minversion})) {
my $min = $opts{minversion};
if (ver_norm($ver) lt ver_norm($min)) {
Log("NO: version $ver is too old (need >= $min)\n");
return 0;
}
}
Log("YES: version $ver\n");
Set("CONFIG_HAVE_$upper" => 1);
Set("CONFIG_VER_$upper" => $ver);
my $want = $opts{want};
defined $want or $want = ["cflags", "libs"];
for my $w (@$want) {
my $uw = $w; $uw =~ tr/a-z-/A-Z_/;
my $cf = TryCmd("$pc --$w");
Set("${upper}_${uw}" => $cf) if defined $cf;
}
return 1;
}
# We succeeded
1;