my $path=`pkg-config libucw --variable=build_system`;
if($? || not defined $path) {
Fail("Not found (is libUCW installed and PKG_CONFIG_PATH set?)");
my $path=`pkg-config libucw --variable=build_system`;
if($? || not defined $path) {
Fail("Not found (is libUCW installed and PKG_CONFIG_PATH set?)");