@_convert_error<EOL>def exists(package):
pkg_config_exe = os.environ.get('<STR_LIT>', None) or '<STR_LIT>'<EOL>cmd = '<STR_LIT>'.format(pkg_config_exe, package).split()<EOL>return call(cmd) == <NUM_LIT:0><EOL>
Return True if package information is available.

If ``pkg-config`` not on path, raises ``EnvironmentError``.