while (1) {
    $exe_path = "$openssl_path/bin/openssl";
    last if -x $exe_path;
    $exe_path = "$openssl_path/bin/openssl.exe";
    last if -x $exe_path;
    $exe_path = "$openssl_path/sbin/openssl";
    last if -x $exe_path;
    $exe_path = "$openssl_path/out32dll/openssl.exe";
    last if -x $exe_path;

    print "I could not find your OpenSSL in `$openssl_path'\n";
    print "Please provide OpenSSL-$openssl_vers or\n"
	. "OpenSSL-$openssl_vers2 installation directory (get from\n"
	." http://www.openssl.org/ if you don't have it; please note that\n"
	    ." SSLeay is no longer supported, see README) (C-c to abort):\n";
    $openssl_path = <STDIN>;
    chomp $openssl_path;
}