bail("Please install the taglib C++ library first. \nI need the package that has taglib-config")
  unless system('taglib-config --version > /dev/null') == 0;
  
chomp(my $libver = qx{taglib-config --version});
...
chomp(my $libs   = qx{taglib-config --libs});
...
chomp(my $inc = qx{taglib-config --cflags});